Full references

Meta-analysis of randomised trials of balloon dilation of the eustachian tube (BDET). Across three trials (315 participants) BDET raised the chance of a postoperative type A tympanogram (relative risk 4.68, 95% CI 2.88-7.51) versus control, and improved air-bone gap closure when combined with cartilage tympanoplasty in adhesive otitis media. Best current evidence that eustachian-tube dysfunction is becoming directly treatable. Verified on PubMed (PMID 40944547) and CrossRef.

Cited in: Future Perspectives and Unmet Needs in Hearing Restoration

Bayesian network meta-analysis of 17 studies and 1,273 patients comparing autologous, titanium, hydroxyapatite, Teflon and other prostheses through direct and indirect comparisons. Hydroxyapatite and titanium performed similarly for air-bone-gap closure (mean effect about 16 dB), while autologous and Teflon ranked highest for air- and bone-conduction outcomes. No single prosthesis was definitively superior across all endpoints, supporting individualised, patient-specific selection. DOI 10.1007/s12070-025-05605-2 verified via Springer.

Cited in: Systematic Reviews and Meta-Analyses of Ossiculoplasty

Systematic review and meta-analysis of 273 patients across seven studies (149 heat-activated, 124 superelastic nitinol). Pooled mean air-bone gap reduction was 20.2 dB (95% CI 19.5-21.0); ABG <=10 dB ranged 64.5-83.3% (heat-activated) and 32.3-83.3% (superelastic) with no significant difference. Overall complication rates were low (6.0% heat-activated, 5.6% superelastic); late incus necrosis (about 1.3%) was more frequent with heat-activated devices, possibly from crimping pressure, while superelastic designs showed better long-term predictability. Best pooled evidence for nitinol stapes outcomes. Verified PMID 40004599, DOI 10.3390/jcm14041069.

Cited in: Self-Crimping and Smart Stapes Prosthesis Systems

Comparative ergonomic study in otologic surgery: the operating microscope produced a higher mean RULA postural-risk score (5.9) than a 3D exoscope (4.0), with surgeons reporting greater physical strain and effort at the microscope. Verified on PubMed/PMC (PMC12484397).

Cited in: Patient Positioning, Draping, and Microscope Setup

Pediatric series comparing autologous incus interposition with TORP; ABG <=20 dB achieved in 72.5% of incus-interposition ears versus 39.5% of TORP ears at medium-term follow-up. Verified via PubMed and CrossRef.

Cited in: Patient Selection in Pediatric and Bilateral Disease

Meta-analysis of 44 studies and 4,582 patients. Cartilage achieved a significantly higher graft take rate than temporalis fascia, while fascia gave a marginally smaller mean postoperative air-bone gap; overall hearing gains were comparable. Quantifies the take-rate versus acoustic-transparency trade-off between soft-tissue and cartilage grafts. Verified PMID 36300279.

Cited in: Tympanic Membrane Reconstruction and Prosthesis Coupling, Temporalis Fascia and Perichondrium Grafts

Prospective series of 27 cholesteatoma ears reconstructed with primary autologous malleus head interposition during canal wall down surgery: postoperative air-bone gap of roughly 9-11 dB across speech frequencies, with the technique judged simple, low-cost and low-complication when the incus is absent but the malleus head remains.

Cited in: Remodeling and Repositioning Native Ossicular Remnants

Three-centre retrospective series of 292 endoscopic ossiculoplasties; mean air-bone gap fell from 26.9 dB to 19.9 dB at a mean 20.7 months, with a 94.2 percent graft success rate, supporting the technique across mixed ossicular pathology. Verified against the Springer and PMC records.

Cited in: Endoscopic Ossiculoplasty: Technique and Evidence

1679 ossiculoplasties; derives the Ear Environment Risk (EER) scale (0-12) and quantifies how revision, canal-wall-down cavities, drainage and a lateralised/blunted drum widen the postoperative air-bone gap. Verified PubMed/CrossRef.

Cited in: The Ossiculoplasty Outcome Parameter Staging (OOPS) Index, Comparing Risk Scores: MERI, OOPS, and the EER, Preoperative Evaluation and Patient Selection: Chapter Overview, Absolute and Relative Contraindications, Surgical Principles, Anaesthesia and Approaches: Chapter Overview, The Surgical Philosophy of Ossicular Chain Reconstruction, Material Science of the Middle Ear Environment, An Evidence-Based Prosthesis Selection Algorithm, Air-Bone Gap as the Core Outcome Measure, Applying and Validating Prognostic Scoring Systems, Future Perspectives and Unmet Needs in Hearing Restoration

Systematic review of graft materials, predictors of ossicular necrosis and residual-cholesteatoma risk in autologous incus ossiculoplasty across literature from 1950-2021. Concludes the available evidence is heterogeneous and insufficient to crown an ideal prosthesis, calling for larger standardised studies. The methodological caution at the heart of this module: the pooled signal is real but the underlying trials are small and inconsistent. DOI 10.1007/s12070-025-05327-5 verified via Springer.

Cited in: Systematic Reviews and Meta-Analyses of Ossiculoplasty

Case-based workflow describing 3D modelling, reconstruction and printing of a total ossicular replacement prosthesis (TORP) from imaging of a cholesteatoma-affected middle ear, with attention to obtaining precise measurements and reproducing the individual anatomy to shorten complex, prolonged surgery and improve fit. Supports the TORP end of the pipeline and the disease-specific (cholesteatoma) use case. Verified PMID 40245921, DOI 10.1088/1748-605X/adce68.

Cited in: From CT to Custom Implant: The Digital Pipeline

Workflow case study for a patient-specific total ossicular replacement prosthesis (TORP) in cholesteatoma. Detailed 3D modelling and reconstruction of the middle-ear bones yielded precise anatomical measurements and a printed prototype whose form and dimensions were validated by radiologists and traumatologists as meeting clinical requirements. The authors stress that further testing and regulatory approval are required before clinical use, illustrating both the promise and the translational gap. Verified PMID 40245921, DOI 10.1088/1748-605X/adce68.

Cited in: 3D-Printed Patient-Specific Prostheses

Meta-analysis of 5 studies (504 patients) showing comparable air-bone gap closure, postoperative pure-tone average and surgical success between endoscopic and microscopic ossicular chain reconstruction, with shorter operative duration favouring the endoscopic approach. Verified against PubMed record.

Cited in: The Transcanal Approach to the Middle Ear, Recent Advances and Future Directions: Chapter Overview, Endoscopic Ossiculoplasty: Technique and Evidence, Endoscopic Versus Microscopic Reconstruction

Systematic review of 808 temporal bones; round window membrane surface area ranges ~0.32-2.89 mm2 with a smallest dimension of ~0.5-2.1 mm, framing the small, variable target relevant to niche clearance and round window stimulation.

Cited in: The Round Window, Oval Window, and Cochlear Interface

Design-and-bench evaluation of a titanium prosthetic incus that anatomically resembles the native incus rather than a straight columella. Using contralateral-ear CT imaging, finite-element analysis, 3D printing and experimental laser-Doppler testing, the anatomic incus gave superior sound transmission at low frequencies (below 1000 Hz) versus a conventional PORP and comparable performance at higher frequencies, with the potential for improved stability and reduced displacement from its precise anatomical fit. Frames the rationale for biomimetic, patient-specific design. Verified DOI 10.1016/j.bprint.2025.e00393 (CrossRef).

Cited in: 3D-Printed Patient-Specific Prostheses

Systematic review confirming ossicular discontinuity is the commonest cause of conductive hearing loss, that 40 to 90 percent of tympanoplasties need reconstruction, and addressing the residual-cholesteatoma risk of reusing an eroded autologous incus. Verified on PMC.

Cited in: Indications for Ossiculoplasty: When to Reconstruct

Review of 11 stapedotomy studies; fenestration 0.5-0.8 mm and prosthesis 0.4-0.6 mm, with air-bone-gap closure to within 10 dB in 57-88.9% of cases. Verified via PubMed Central.

Cited in: The Stapes and Oval Window: Superstructure, Crura, and Footplate

Endoscopic revision cohort cataloguing the late findings that explain failure: adhesive tissue tethering the chain (37%), tympanosclerosis (37%), prosthesis dislocation (33%), ossicular erosion (33%) and residual cholesteatoma (11%). Confirms that granulation, adhesions and recurrent disease, not simple slippage alone, dominate the delayed-failure field. Verified PMID 39549077.

Cited in: Revision Ossiculoplasty for Failed Reconstruction, Delayed Complications and Late Failure

Developed and validated a deep-learning model for automatic 3D reconstruction of the ossicular chain and bony labyrinth on high-resolution temporal-bone CT. The model produced reconstructions in 17.7 +/- 10.1 seconds versus 1080.5 +/- 149.8 seconds for manual reconstruction (P < .001), with Dice similarity coefficients of 0.98-0.99 across diverse pathologies (otitis media, mastoiditis, otosclerosis, malformations, Meniere disease). Supplies the imaging front-end that an AI planning pipeline depends on. Verified DOI 10.1093/radadv/umaf004 (Oxford Academic).

Cited in: Artificial Intelligence in Ossiculoplasty Planning

In primary cholesteatoma ossiculoplasty with an intact stapes, closed (canal wall up) cavities achieved a better mean postoperative air-bone gap (about 19 dB) than open cavities (about 23 dB), and incus interposition (19 dB) outperformed type III tympanoplasty (26 dB). Verified on PubMed.

Cited in: Mastoidectomy as a Platform for Reconstruction

CT-versus-operative correlation in chronic otitis media: malleus sensitivity 92.5% / specificity 100%, incus 93.5% / 94.7%, stapes 76% / 100%. The stapes superstructure is the least reliably imaged ossicle. Verified against the PubMed record.

Cited in: Preoperative Evaluation and Patient Selection: Chapter Overview, Imaging Ossicular Erosion, Fixation, and Dehiscence

Developed an explainable AI system using 3D convolutional neural networks for automatic CT-based evaluation of chronic otitis media. The system reached 81.8% accuracy in pre-operative diagnosis for 121 patients, contributed to clinical decision-making in 90.1% of cases, outperformed a 2D approach (notably for cholesteatoma detection) and matched senior clinicians, with heat maps highlighting the middle ear and mastoid that aligned with human interpretation. Illustrates the value of explainability for surgical adoption. Verified PMID 39116439, DOI 10.2196/51706.

Cited in: Artificial Intelligence in Ossiculoplasty Planning

Updated TRIPOD reporting guideline covering regression and machine-learning prediction models, emphasising transparent reporting, external validation, calibration and fairness. The governance benchmark any clinical ossiculoplasty model should meet. Verified PubMed/CrossRef.

Cited in: AI-Driven Outcome Prediction and Risk Modeling

Comparative series of transcanal endoscopic versus microscopic surgery for ossicular chain disruption showing endoscopic ossiculoplasty was appropriate even in the early adoption phase, with comparable hearing results. Verified against PubMed record (PMID 38745291).

Cited in: Endoscopic Versus Microscopic Reconstruction

Narrative review of AI across otologic imaging, treatment-outcome prediction (including tympanoplasty and cochlear implants) and hearing-aid optimisation; contextualises the move from legacy indices to data-driven models. Verified PubMed/CrossRef.

Cited in: AI-Driven Outcome Prediction and Risk Modeling

Prospective study of 214 middle-ear operations: taste disturbance in 42.7% at 10 days, 23.3% at 4 months and 9.2% at 1 year. In initially healthy nerves, transection caused more lasting dysgeusia than stretching; when the nerve was diseased, stretching fared worse. Verified on PubMed (Wiley OHN).

Cited in: Raising the Tympanomeatal Flap Safely, Principles of Complication Avoidance in Ear Surgery, Immediate Postoperative Complications

Training application of the same printing technology. A transparent photopolymer middle-ear phantom built from micro-CT was used by 20 participants (10 experienced otosurgeons, 10 ORL-HNS residents) for ossiculoplasty simulation with a 3D-printed PORP. Landmarks were clearly identifiable, drilling and ossicular-chain movement were rated realistic by most otosurgeons, and the model was judged suitable for low-threshold training as a cheaper, more available alternative to cadaveric temporal bone. Shows the same CT-to-print pipeline also yields patient-specific rehearsal models. Verified PMID 38658934, DOI 10.1186/s12909-024-05436-9.

Cited in: 3D-Printed Patient-Specific Prostheses

Review linking finite-element analysis of middle-ear prostheses to additive manufacturing (3D printing). Argues that FE-based virtual testing can guide patient-specific prosthesis geometry and material selection, which 3D printing can then realise, and surveys the materials and modeling approaches used in ossicular-chain reconstruction. Connects computational prediction to the emerging custom-prosthesis pipeline. Verified DOI 10.1016/j.bprint.2023.e00328 (Bioprinting, vol 38, 2024).

Cited in: Finite Element Modeling of the Reconstructed Ear

Contemporary review of tissue-engineering progress across the ear, nose, larynx and facial skeleton, summarising scaffold and cell strategies and emphasising that most ear applications remain preclinical. Provides the field-level context and maturity assessment cited in the module. Verified on PubMed (PMID 39017827) and CrossRef.

Cited in: Stem Cell Approaches to Middle Ear Reconstruction

Swedish nationwide register study; postoperative air-bone gap <=20 dB achieved in about 62% overall, with bone and titanium prostheses yielding similar hearing outcomes for PORP and TORP. Verified via Wiley and the journal record.

Cited in: Preoperative Evaluation and Patient Selection: Chapter Overview, Surgical Principles, Anaesthesia and Approaches: Chapter Overview

Built and compared four machine-learning models (Lasso, Ridge, k-nearest neighbour, random forest) to predict post-operative hearing after stapedotomy from pre-operative hearing and other features. Best predictions were at air-conduction frequencies of 1000-3000 Hz, with mean absolute errors of about 6 dB. A worked example of frequency-specific, individual-patient outcome prediction in middle-ear surgery, transferable in principle to ossiculoplasty. Verified DOI 10.3390/app142411882 (MDPI, open access).

Cited in: Artificial Intelligence in Ossiculoplasty Planning

Modern synthesis of middle-ear mechanics: impedance matching through ossicular coupling, the area-ratio/lever transformer, and the biomechanical aim of reconstruction to restore a stable low-loss pathway. Verified via PubMed (PMC11052546).

Cited in: The Surgical Philosophy of Ossicular Chain Reconstruction

Dynamic synchrotron X-ray imaging of seven stimulated ex-vivo human temporal bones quantified the 3D rigid-body motion of the ossicles, confirming the lever-like motion of malleus and incus and revealing more intricate, multi-axis stapes behaviour. Illustrates next-generation imaging informing prosthesis biomechanics. Verified on PubMed (PMID 38326549) and CrossRef.

Cited in: Recent Advances and Future Directions: Chapter Overview

Prospective randomised trial of 60 Austin type A ears comparing partial and total prostheses. Hearing gain and air-bone gap closure were comparable (mean postoperative gap ~32-33 dB in both arms); the authors favoured TORP for greater construct stability, illustrating how the Austin type frames but does not dictate prosthesis choice.

Cited in: The Austin-Kartush Classification of Ossicular Defects, Reconstruction Techniques by Defect Pattern: Chapter Overview

Contemporary review of rhBMP-2 in spinal fusion that catalogues the dose-dependent adverse effects of supraphysiologic growth-factor delivery: ectopic and heterotopic bone formation, soft-tissue swelling, endplate resorption and other complications, with higher doses (>8.4 mg/level) carrying ~18% complication rates. The cautionary template for any plan to deliver osteoinductive protein into the confined, neurovascular-rich middle ear. Verified PMID 39188335.

Cited in: Regenerative Medicine for Ossicular Tissue

Systematic review and meta-analysis of 43 studies (3,712 patients): endoscopic and microscopic type I tympanoplasty give similar graft success and air-bone gap improvement, while endoscopic surgery has shorter operative time (mean difference about -20 min), less need for canalplasty, better cosmesis and lower pain. Supports that access route is chosen for exposure and morbidity, not hearing outcome. Verified via PubMed.

Cited in: Surgical Principles, Anaesthesia and Approaches: Chapter Overview

Current StatPearls review of ossiculoplasty. States that prostheses must remain inert in the middle ear to prevent foreign-body reactions, summarises the acoustic targets for an ideal prosthesis (low mass, proper tension between drum and stapes, a shallow angle to the tympanic membrane, and accommodation of the malleus), and frames material selection around biocompatibility, stability, safety and availability. Last updated 11 December 2024; NCBI Bookshelf NBK563162. Verified.

Cited in: Surgical Principles, Anaesthesia and Approaches: Chapter Overview, Criteria for the Ideal Ossicular Prosthesis

Meta-analysis of 8 RCTs (989 patients) comparing dried (rigid) and wet temporalis fascia grafts. No significant difference in surgical success, audiological success, post-operative pure-tone average or graft-placement time. Settles the wet-versus-dry fascia debate as a matter of surgeon preference. Verified PMID 36350366.

Cited in: Harvesting Cartilage, Fascia, and Bone Grafts

Systematic review and meta-analysis of 27 studies (5,848 cases): pooled prevalence of facial canal dehiscence at cholesteatoma surgery 24.67% (95% CI 21.51-27.84%); the tympanic segment accounted for 93.79% of dehiscences. Verified on the journal record (DOI 10.21037/ajo-23-1).

Cited in: The Facial Nerve in the Middle Ear: Course and Surgical Hazards

Current operative reference describing the tympanomeatal flap: radial canal incisions, the safe distance of the curved incision from the annulus, posterior-quadrant elevation, and identification of the chorda tympani during entry to the middle ear. Verified on NCBI Bookshelf (updated 2023).

Cited in: Raising the Tympanomeatal Flap Safely

Literature review of titanium ossicular prostheses: average extrusion or dislocation rate about 5.2% (range 0-35%), higher in children (about 13.7%); cartilage interposition between prosthesis head and tympanic membrane reduces extrusion to roughly 1-2%. Grounds the figures on prosthesis extrusion, displacement and the protective role of cartilage. Verified PubMed/CrossRef.

Cited in: The Surgical Philosophy of Ossicular Chain Reconstruction, Prosthesis Extrusion: Mechanisms and Prevention, Prosthesis Displacement, Tilting, and Refixation, Immediate Postoperative Complications

Meta-analysis of machine-learning and deep-learning models classifying middle-ear disorders from tympanic-membrane images, reporting accuracy of 76.0-98.3% across diagnostic categories. Quantifies the diagnostic performance underpinning AI-assisted preoperative assessment. Verified on PubMed (PMID 35848851) and CrossRef.

Cited in: Recent Advances and Future Directions: Chapter Overview

Comparative study concluding the endoscopic approach is as reliable as the microscopic one across incus interposition, bone cement and prosthetic reconstructions, with the type of ossiculoplasty having no effect on functional success of either approach. Verified against PubMed record (PMID 35428604).

Cited in: Endoscopic Versus Microscopic Reconstruction

Consecutive cohort of 157 ossiculoplasties (50 transcanal endoscopic, 107 microscopic/combined); an air-bone gap within 20 dB was achieved in 72 percent of endoscopic and 73 percent of microscopic cases, with no significant difference. Verified against PubMed record.

Cited in: Endoscopic Ossiculoplasty: Technique and Evidence, Endoscopic Versus Microscopic Reconstruction

Meta-analysis restricted to randomised trials finding endoscopic and microscopic type-1 tympanoplasty have comparable graft success (85.1% vs 86.4%) and hearing improvement, with shorter operative time for the endoscopic approach. Provides the strongest comparative evidence base for transcanal endoscopic middle-ear surgery. Verified against PubMed record (PMID 36349835).

Cited in: Endoscopic Versus Microscopic Reconstruction

Micro-CT, histomorphometry and nanoindentation of cholesteatoma-affected incudes showing increased porosity, raised osteoclast indices, impaired mineralisation and degraded biomechanics; corroborates that ossicles undergo essentially no remodelling and cannot self-repair an ischaemic insult.

Cited in: Blood Supply of the Ossicles and Ischemic Necrosis

Bench and cadaveric feasibility study of vat-photopolymerised partial ossicular replacement prostheses (PORP) modelled on a commercial titanium design, printed in lengths 1.5-3.0 mm from liquid photopolymer (Clear V4). Print reproducibility was good once the shaft diameter was 0.6 mm; the printed PORPs were easy to manipulate (though slightly stiffer than titanium) and their acoustic transfer measured by laser-Doppler vibrometry was similar to a commercial titanium PORP. Concludes that functional individualised middle-ear prostheses can be printed with good accuracy/reproducibility, currently best suited to surgical training pending clinical study. Source for design parameters, shaft diameter, and acoustic equivalence. Verified PMID 37323487, DOI 10.18063/ijb.727.

Cited in: Recent Advances and Future Directions: Chapter Overview, 3D-Printed Patient-Specific Prostheses, From CT to Custom Implant: The Digital Pipeline

Historical perspective contrasting Lempert's endaural approach with the postauricular route favoured by other otologists, and the lineage of modern ear surgery. Verified on PubMed.

Cited in: The Endaural Approach: Incisions and Exposure

Study of postoperative vertigo after stapes surgery: early vertigo is common and usually settles, but persistent or delayed vertigo should raise concern for an over-long prosthesis, perilymph fistula or labyrinthine injury, and is associated with poorer hearing outcomes. Supports the discussion of early vertigo, its benign majority and its alarm features. Verified PubMed/CrossRef.

Cited in: Immediate Postoperative Complications

Retrospective cohort of 135 ossicular chain reconstructions (96% titanium PORP/TORP). Primary procedures succeeded significantly more often than revisions (72.3% vs 52.0%, p=0.032), and it was the fact of revision rather than the number of prior operations that drove the worse result. The best outcomes were in primary PORP reconstructions without cholesteatoma. Verified PMID 36806910.

Cited in: Revision Ossiculoplasty for Failed Reconstruction

Open review of cortical and modified mastoidectomy. Confirms the depth landmarks of cortical drilling: the spine of Henle and temporal line at the cortex, the antrum at the deepest anterior point, and the lateral semicircular canal warning that dissection has reached the level of the facial nerve. Verified on NCBI Bookshelf.

Cited in: The Postauricular Approach and Wide Exposure, Mastoidectomy as a Platform for Reconstruction

Current review of ossiculoplasty indications and technique. States the core indication is a documented conductive hearing loss from known or suspected ossicular pathology, that a loss under about 15 dB is usually not offered surgery, and that 40 to 90 percent of tympanoplasties require ossicular reconstruction. Verified on NCBI Bookshelf.

Cited in: Indications for Ossiculoplasty: When to Reconstruct

Systematic review and meta-analysis of 40 articles on titanium ossicular reconstruction. Pooled air-bone-gap improvement was 12.1 dB for PORP and 16.7 dB for TORP; pure-tone average improved 13.5 dB (PORP) and 17.0 dB (TORP). A postoperative ABG within 20 dB was achieved in 70% of PORP and 57% of TORP ears. PORP ears began with a 7.0 dB smaller preoperative gap, and TORP ears showed a larger raw improvement from a worse baseline. The headline pooled figures used throughout this module. Verified PMID 36624585, DOI 10.1097/MAO.0000000000003772.

Cited in: Titanium Ossicular Prostheses: Light, Stiff, and MRI-Safe, Outcomes, Prognosis and Complications: Chapter Overview, Air-Bone Gap as the Core Outcome Measure, Sensorineural Hearing Loss After Ossiculoplasty, Systematic Reviews and Meta-Analyses of Ossiculoplasty

Retrospective series (114 ears) comparing random forest, SVM and kNN against the MERI and OOPS scores for predicting postoperative air-bone gap. Random forest reached 81.5% binary accuracy (ABG <=15 vs >15 dB) versus 62.3% for MERI and 72.8% for OOPS. Verified PubMed/CrossRef.

Cited in: Artificial Intelligence in Ossiculoplasty Planning, AI-Driven Outcome Prediction and Risk Modeling

Observational HRCT series of 50 chronic otitis media ears: 100% sensitivity and specificity for scutum and malleus erosion, with the epitympanum involved in 78%, supporting CT for soft-tissue extent and surgical planning. Verified against the PubMed record.

Cited in: Imaging Ossicular Erosion, Fixation, and Dehiscence

Review of eighty articles on titanium PORP and TORP extrusion and dislocation. The pooled average extrusion or dislocation rate was 5.2% (range 0-35%), with mean air-bone-gap improvements of 12.1 dB (PORP) and 13.8 dB (TORP). Quantifies the residual extrusion problem of bare titanium that bioactive coatings and cartilage caps are designed to mitigate. DOI verified via CrossRef.

Cited in: Bioactive and Composite Prosthesis Coatings, Systematic Reviews and Meta-Analyses of Ossiculoplasty, Regenerative Medicine for Ossicular Tissue

484 chronic otitis media ears; LightGBM and a multilayer perceptron outperformed a logistic-regression baseline for postoperative air-bone gap and air-conduction gain (LightGBM mean AUROC ~0.811). Preoperative hearing status was the most influential feature. Verified PubMed/CrossRef.

Cited in: Artificial Intelligence in Ossiculoplasty Planning, AI-Driven Outcome Prediction and Risk Modeling

Chronological review of every material class tried for ossicular chain reconstruction: autografts (incus, cortical bone, cartilage), homografts, and successive generations of alloplasts (polyethylene/Plastipore, PTFE, Proplast, Ceravital and other bioactive glass-ceramics, hydroxyapatite, titanium and hybrids). Documents the historical rise and fall of each, the move from sculpted autografts toward biocompatible synthetics, and the criteria (biocompatibility, rigidity, low mass, non-resorption, ease of handling) used to judge an ideal prosthesis. Also notes Wullstein's 1952 first synthetic (Palavit vinyl-acryl) strut. Verified PMID 36875817, DOI 10.3892/mi.2023.73.

Cited in: Autograft Versus Alloplast: Choosing the Material, Criteria for the Ideal Ossicular Prosthesis, Titanium Ossicular Prostheses: Light, Stiff, and MRI-Safe, Choosing Autograft Versus Prosthesis by Defect Pattern

Literature review concluding that the postauricular approach is not reliably associated with lasting auricular protrusion, and that transient protrusion usually settles. Verified on PubMed.

Cited in: The Postauricular Approach and Wide Exposure

First feasibility study of a biohybrid ossicular prosthesis: human adipose-derived mesenchymal stem cells were seeded on titanium and, in osteogenic medium, adhered, proliferated and differentiated into osteoblasts with upregulated Bglap, Col1a1 and Alp and abundant collagen-rich matrix deposited on the metal. The explicit goal was a living bone matrix grown over the metallic core to convert a bioinert prosthesis into an osseointegrating, extrusion-resistant one. In vitro only; in vivo work is still required. Verified PMID 38132815, DOI via CrossRef.

Cited in: Regenerative Medicine for Ossicular Tissue, Biomimetic Scaffolds for Ossicular Regeneration

Systematic review and meta-analysis of 14 studies; dexmedetomidine for controlled hypotension produced a significantly drier operative field (better Fromme-Boezaart score) than placebo and higher surgeon and patient satisfaction than comparator agents in middle-ear surgery. Verified PubMed/CrossRef.

Cited in: Anaesthesia for Middle Ear Surgery: General and Local

Meta-analysis of 11 studies and 449 children (247 PORP, 202 TORP). A postoperative air-bone gap within 20 dB was reached in 62.5% of PORP versus 48.3% of TORP recipients. PORP ears had a smaller preoperative gap (by 6.3 dB) and a smaller postoperative gap (by 1.8 dB). Critically, extrusion rates did not differ between PORP and TORP (odds ratio 1.08, p=0.90), showing the PORP advantage reflects defect severity, not prosthesis design. Verified PMID 36347062, DOI 10.1016/j.amjoto.2022.103658.

Cited in: Patient Selection in Pediatric and Bilateral Disease, Systematic Reviews and Meta-Analyses of Ossiculoplasty

Applied the Belfast 15/30 dB rule to mucosal and squamosal chronic otitis media; concordance between the rule and patient self-assessment of benefit was 73.4%, with the rule performing better in mucosal than squamosal disease. Verified via PubMed.

Cited in: Belfast, Glasgow, and AAO-HNS Reporting Standards

Narrative review of AI applications in temporal-bone imaging across diagnosis, segmentation and outcome prediction. Summarises the gains (time saving, reduced inter-observer variability, improved diagnostic accuracy) and the recurring barriers to clinical translation: small and single-centre datasets, lack of external validation, the black-box problem and regulatory/medicolegal uncertainty. Used here for the balanced appraisal of current limitations. Verified PMID 37795060, DOI 10.7759/cureus.44591.

Cited in: Artificial Intelligence in Ossiculoplasty Planning

Systematic review and meta-analysis (19 studies, 3563 participants): roughly 79% of otolaryngologists report any work-related musculoskeletal symptom, 54% neck symptoms and 49% back symptoms, with microscope and operating posture identified as drivers. Verified on PubMed (PMID 35575629).

Cited in: Patient Positioning, Draping, and Microscope Setup

20-year referral series of iatrogenic facial nerve injuries: the tympanic segment was the most frequently injured site (around three-quarters of cases), the second genu next, and nearly half involved more than one segment. Verified on PubMed.

Cited in: The Facial Nerve in the Middle Ear: Course and Surgical Hazards, Principles of Complication Avoidance in Ear Surgery

Review framing the human MEMR as a bilateral stapedius-driven contraction to moderate-to-high intensity sound, with thresholds, latency, adaptation, and limits as a protective and diagnostic measure.

Cited in: Tensor Tympani and Stapedius: Protective Muscle Reflexes

Meta-analysis of non-echo-planar diffusion-weighted MRI for residual or recurrent cholesteatoma, with pooled sensitivity 92.2% and specificity 91.7%. Supports non-EPI DWI as a non-invasive alternative to routine second-look surgery for surveillance of the canal-wall-up ear after reconstruction, with small (2-4 mm) lesions the main source of false negatives. Verified PMID 36582564.

Cited in: Delayed Complications and Late Failure

Narrative review of how the finite-element method is used to design and optimize auditory (middle-ear) prostheses. Summarizes how FE simulation explores prosthesis mass, stiffness, material, length, contact position and coupling on a computer before manufacture, overcoming the cost and limited adjustability of cadaveric experiments, and outlines validation needs and future directions. Useful synthesis of the prosthesis-design application of FE modeling. Verified PMID 35845520, DOI 10.21037/atm-22-2792.

Cited in: Finite Element Modeling of the Reconstructed Ear

Materials/biofabrication study. Anatomically correct, size- and shape-personalised ossicle models were extrusion-printed as solid, porous or soft constructs from a plottable calcium-phosphate/hydroxyapatite paste, either on a solid support or embedded in a Carbopol hydrogel support bath, then temperature-hardened. Demonstrates that personalised ossicle geometry can be reproduced in a bioactive, bone-mimicking material rather than only in resin or titanium, supporting the materials half of the digital pipeline. Verified DOI 10.3390/app122111015.

Cited in: From CT to Custom Implant: The Digital Pipeline

Narrative review synthesising the evidence that higher MERI predicts poorer graft uptake and audiological gain, and summarising the weighted scoring scheme. Verified PubMed/CrossRef.

Cited in: The Middle Ear Risk Index (MERI) Explained, Middle Ear Pathology, Atelectasis, and Outcome, Applying and Validating Prognostic Scoring Systems

Review of tensor tympani anatomy and proposed functions, including stiffening of the tympanic membrane, low-frequency attenuation, and desensitisation to self-generated sounds such as mastication and vocalisation.

Cited in: Tensor Tympani and Stapedius: Protective Muscle Reflexes

Systematic review and meta-analysis of AI computer-vision algorithms classifying otoscopic images: 90.7% accuracy for normal versus abnormal and 97.6% for a normal/AOM/OME triage, with AI outperforming human assessors (93.4% vs 73.2%) in pooled studies. Highlights both promise and the data-quality caveats of clinical AI. Verified on PubMed (PMID 35253378) and CrossRef.

Cited in: Recent Advances and Future Directions: Chapter Overview

Meta-analysis of chronic otitis media surgery in the only hearing ear. Air-conduction and bone-conduction thresholds were stable or improved in ~88% and ~95% of ears; deterioration in air conduction was expected in roughly 13-15% and in bone conduction in roughly 3-5%. Verified via PubMed and CrossRef.

Cited in: Patient Selection in Pediatric and Bilateral Disease

Micro-CT reconstruction of intraosseous vascular channels confirming the sparse internal supply that predisposes the incus long process to resorption.

Cited in: Foundations and Anatomy of the Middle Ear: Chapter Overview, Blood Supply of the Ossicles and Ischemic Necrosis

Prospective study showing graft success falls steeply with worsening preoperative eustachian function by pressure-equalisation testing: 97% (normal), 80% (partial), 20% (gross dysfunction). Verified on PubMed (PMC9988816).

Cited in: The Eustachian Tube and Middle Ear Ventilation, Assessing Eustachian Tube Function Before Surgery, The Transcanal Approach to the Middle Ear

Historical analysis from primary sources showing that Urban Ortegren (Lund, 1957) and Hans Heermann (Essen, 1958) introduced temporalis fascia for tympanic membrane reconstruction before its wider Anglo-American adoption, correcting the common attribution. Useful for the historical framing of soft-tissue grafts. Verified DOI 10.1177/15533506211031445.

Cited in: Tympanic Membrane Elevation and Annulus Management, Temporalis Fascia and Perichondrium Grafts

Contemporary review framing the field. Confirms the trilaminar drum (squamous epithelium, fibrous lamina propria, mucosa), that most acute perforations close spontaneously (77-94%) whereas chronic perforations and ~20% graft failures motivate engineered alternatives, and that scaffolds (collagen, silk fibroin, acellular matrices, printed polymers), cell sheets and growth factors are being combined to regenerate native tissue while avoiding donor-tissue harvest and its iatrogenic complications. Verified PMID 36824158.

Cited in: Tissue-Engineered Tympanic Membranes

Animal model using hyaluronate laminas as a delivery vehicle for mesenchymal stem cells over delayed-healing perforations, demonstrating a clinically tractable, office-deliverable construct and confirming the scaffold's role as both carrier and matrix. Supports the delivery-system discussion in the module. Verified on PubMed (PMID 35287155) and CrossRef.

Cited in: Stem Cell Approaches to Middle Ear Reconstruction

Comprehensive review of biomaterials used in otorhinolaryngology (cochlear implants, middle-ear prostheses, voice prostheses, osteosynthesis materials, nasal packing) with emphasis on antimicrobial strategies including silver, antibiotic elution, surface bioactivity and anti-adhesive coatings. Useful framing reference for the spectrum of antibacterial surface approaches and their trade-offs. Verified PMID 35269718.

Cited in: Bioactive and Antibacterial Prosthesis Coatings

Modern review summarising area-ratio, ossicular lever and buckling contributions and their measured magnitudes. DOI and PMID verified.

Cited in: The Ossicular Lever and Catenary Mechanisms

CBCT study of 130 adults classifying sinus tympani depth and relating a deep (type C) sinus to the need for a retrofacial approach. Verified on PubMed (PMC9899740).

Cited in: Temporal Bone Surgical Anatomy for the Otologist

Randomised controlled trial showing the alpha-2 agonist dexmedetomidine, used for controlled hypotension, improves the visibility of the microsurgical field in middle ear surgery (intravenous route best at 30 min). Illustrates the role of a bloodless field and hypotensive anaesthesia in otomicrosurgery. Verified via PubMed/PMC.

Cited in: Surgical Principles, Anaesthesia and Approaches: Chapter Overview

Observational cohort of 81 ears with posterosuperior pars tensa retractions followed for a median of 64 months. Over watchful waiting the mean air-bone gap was roughly stable (17.9 to 15.5 dB), but 12% of ears deteriorated by 10 dB or more, and progression to cholesteatoma (1%), perforation (6%) and ossicular damage (6%) occurred, documenting that retraction is a slow, sometimes silent, late threat to a reconstructed ear. Verified PMID 32890292.

Cited in: Delayed Complications and Late Failure

Shows that severing both the anterior malleal and posterior incudal attachments raises air-conduction thresholds by ~20 dB, while one alone is largely compensated, highlighting redundancy in ligamentous support.

Cited in: Suspensory Ligaments and Synovial Joints of the Ossicles

Long-term (mean ~100 month) comparison of canal-wall-up (CWU) and canal-wall-down (CWD) surgery for paediatric cholesteatoma. CWU carried substantially higher residual (21%) and recurrent (22.9%) cholesteatoma than CWD (7.6% and 2.3%), illustrating why a retained canal wall mandates years of surveillance for delayed recurrence after ossiculoplasty. Verified PMID 34425355.

Cited in: Delayed Complications and Late Failure

Randomised trial in 38 ears with incudostapedial joint erosion (a malleus-to-stapes, type A geometry) comparing a sculpted incus autograft PORP against a titanium angular-clip PORP. Mean ABG reduction was 14.95 dB (incus) vs 12.13 dB (titanium) and success (ABG closed by 20 dB) was 66.7% vs 61.5%, with no statistically significant difference. Confirms that for the short type A gap the autograft matches the alloplast. Verified PMID 35070929, DOI 10.1007/s12070-021-02605-w.

Cited in: Choosing Autograft Versus Prosthesis by Defect Pattern

Illustrative account of total ossicular replacement prosthesis displacement after reconstruction, showing how loss of stable footplate seating and lateral coupling produces delayed conductive relapse and a tilted prosthesis on imaging, the principal mechanical target of revision. Verified PMID 32819141.

Cited in: Revision Ossiculoplasty for Failed Reconstruction, Prosthesis Displacement, Tilting, and Refixation

Eighteen operated ears: hearing improved in 94.4%, air-bone gap closed to within 20 dB in 44.4% and serviceable hearing (AC 30 dB or less) reached in 55.6%; isolated stapes fixation cases did best (100% success, mean AC gain 19.4 dB). No surgical sensorineural hearing loss. Verified via PubMed and PMC.

Cited in: Reconstructing Congenital Ossicular Anomalies

Comparative cohort: postauricular graft take 91.4% (32/35) vs transcanal 97.1% (34/35), not significantly different (p=0.61); both closed the mean air-bone gap to ~13.7 dB. Verified on PubMed/PMC8266074.

Cited in: The Postauricular Approach and Wide Exposure

Comparative series finding less chorda tympani manipulation and fewer taste symptoms with endoscopic than microscopic type I tympanoplasty (4% vs 24% CTN-related symptoms in 66 patients). Verified on PubMed.

Cited in: Tympanic Membrane Elevation and Annulus Management

Comparison of OOPS and MERI as predictors of tympanoplasty hearing outcome; both indices showed only modest discrimination (OOPS ROC ~0.637, MERI ~0.551 at 12 months), illustrating the ceiling of fixed-weight legacy scores. Verified PubMed/CrossRef.

Cited in: The Ossiculoplasty Outcome Parameter Staging (OOPS) Index, Limits of Classification: Toward International Outcome Comparison, Prognostic Factors Revisited: What Drives Outcome, Middle Ear Pathology, Atelectasis, and Outcome, Applying and Validating Prognostic Scoring Systems, Artificial Intelligence in Ossiculoplasty Planning, AI-Driven Outcome Prediction and Risk Modeling

Retrospective series of staged canal-wall-up surgery with temporary Silastic; cholesteatoma cases showed 4% recurrent and 30% residual disease with mean postoperative pure-tone average 36 dB and air-bone gap 21 dB, supporting a continued hearing benefit from staging with sheeting. Verified on PubMed.

Cited in: Maintaining Middle Ear Aeration and Preventing Adhesions

Retrospective comparison of transcanal endoscopic vs post-auricular microscopic ossiculoplasty in children; air-bone gap closed significantly in both groups with similar hearing, but the transcanal endoscopic group had lower postoperative pain and reduced opioid use. Verified on PubMed.

Cited in: The Transcanal Approach to the Middle Ear

HRCT-versus-operative study of ossicular fixation/tympanosclerosis: HRCT showed about 96.8% sensitivity and 98% specificity for ossicular chain fixation, but high-density tympanosclerotic foci can be inferred more confidently than mobility itself, which remains an operative judgement. Verified on PubMed (PMID 34195376).

Cited in: High-Resolution CT of the Temporal Bone

Embryologic and imaging account of the regressing stapedial artery, grounding the developmental vascular anatomy of the middle ear.

Cited in: Foundations and Anatomy of the Middle Ear: Chapter Overview

Retrospective series of 48 patients reconstructing incus long-process defects with hydroxyapatite cement over 15 years. Mean air-bone gap fell from 21.4 dB to 11.8 dB at middle-term follow-up, with an air-bone gap of 20 dB or less in 83% by 6 months, supporting cement for small focal incus defects with an intact, mobile stapes. Verified PMID 33780899.

Cited in: The Incus: Long Process Vulnerability and the Lenticular Joint, Blood Supply of the Ossicles and Ischemic Necrosis, Indications and Pitfalls of Glass Ionomer and HA Cement

Case series of 12 ears reconstructed with a TORP in a tympanic-membrane/malleus-to-footplate configuration even where the stapes superstructure was present. Mean pre-operative air-bone gap 39.8 dB; surgical success (ABG <= 20 dB) in 83.3%, mean ABG closure 27.1 dB. Demonstrates that a footplate-seated TORP is feasible independent of superstructure status, although the superstructure normally favours a PORP. Verified PMID 33221637, DOI 10.1016/j.amjoto.2020.102831.

Cited in: PORP Versus TORP: Matching Prosthesis to Residual Chain

End-to-end convolutional-neural-network solution for automated segmentation of temporal-bone CT, comparing AH-Net, U-Net and ResNet architectures. Achieved human-level accuracy in segmenting the cochlear labyrinth, ossicular chain and facial nerve from clinical (not just micro-) CT. Foundational evidence that the structures relevant to ossiculoplasty can be delineated automatically and reproducibly. Verified PMID 33462998, DOI 10.1038/s41598-020-80619-0.

Cited in: Artificial Intelligence in Ossiculoplasty Planning

Prospective randomised study of overlay tympanoplasty with versus without middle-ear Gelfoam packing. The non-Gelfoam group showed earlier epithelialisation and faster air-bone-gap recovery, with no difference in closure rate, illustrating that absorbable gelatin packing should be used sparingly and only where mechanical support is needed, since it can slow healing and aeration. Verified PMID 33166858.

Cited in: Intraoperative Tricks for Prosthesis Stabilization

Systematic review finding no statistically significant difference in audiometric outcomes between endoscopic and microscopic ossiculoplasty; endoscopic surgery trended toward fewer complications and shorter operative time without reaching significance. Verified against PubMed record.

Cited in: The Transcanal Approach to the Middle Ear, Recent Advances and Future Directions: Chapter Overview, Endoscopic Ossiculoplasty: Technique and Evidence, Endoscopic Versus Microscopic Reconstruction

Retrospective case series of 37 consecutive patients operated with endoscopic exposure and RobOtol-based robotic endoscope holding combined with a microscope, including partial and total ossiculoplasty (tympanoplasty). Complete healing with no tympanic-membrane perforation was achieved in all patients; robot holding the endoscope freed both surgeon hands for bimanual dissection. Source for robot-as-endoscope-holder enabling two-handed endoscopic ossicular reconstruction. Verified PMID 34692763, DOI 10.3389/fsurg.2021.740935.

Cited in: Robotics and Navigation in Middle Ear Surgery

First clinical report of the RobOtol teleoperated robot (Collin, France) used in 32 patients as either an endoscope holder (11 cases of chronic otitis) or a micro-instrument holder (21 cases: 9 otosclerosis, 2 ventilation tube, 10 cochlear implantation). No complication related to robot manipulation occurred intra- or post-operatively; the system could be used safely and with accurate control. Source for the first-in-human clinical feasibility and safety of robot-assisted middle ear/ossicular surgery. Verified PMID 32458123, DOI 10.1007/s00405-020-06070-z.

Cited in: Robotics and Navigation in Middle Ear Surgery

TORP placed tympanic-membrane-to-footplate even with an intact superstructure; ABG <=20 dB in 83.3%, mean ABG closure 27.1 dB. Shows a fallback construct that is independent of remnant ossicular arrangement. Verified via PubMed.

Cited in: Planning for Intraoperative Surprises and Prosthesis Readiness

Endoscopic PORP series stratified by malleus handle: success rate 65.6% with the handle present versus 52% absent, supporting that a malleus-engaging head improves stability and outcome. Verified on PubMed.

Cited in: Malleus-Coupling and Notched Prosthesis Designs

Prospective measurement of auriculo-mastoid distance before and 1 year after postauricular tympanoplasty in 36 patients; no significant protrusion at 1 year despite division of the postauricular soft tissues. Verified on PubMed.

Cited in: The Postauricular Approach and Wide Exposure

Series on intraoperative facial nerve monitoring during otologic surgery; monitoring aids localisation of the nerve and confirms its position, reinforcing the disease-control principle that the facial nerve must be identified and protected during middle ear and mastoid work. Verified via PubMed.

Cited in: Surgical Principles, Anaesthesia and Approaches: Chapter Overview

469 cholesteatoma operations over two decades: facial canal dehiscence higher with disease longer than 5 years and in revision surgery (>40%); the tympanic segment was involved in 92-97% of dehiscent cases and was strongly associated with semicircular-canal fistula. Verified on PubMed.

Cited in: The Facial Nerve in the Middle Ear: Course and Surgical Hazards

234 patients (257 ears) comparing scapha and tragus as auricular cartilage donor sites. Neither site caused cosmetic dissatisfaction or measurable anthropometric change, but clinical sensory changes in the donor skin were significantly less common with the scapha than the tragus, particularly after a retroauricular approach. Evidence on donor-site morbidity of cartilage harvest. Verified PMID 32401205.

Cited in: Harvesting Cartilage, Fascia, and Bone Grafts

Comparative cohort of children showing no advantage of the postauricular microscopic approach over transcanal totally endoscopic surgery for clearance of cholesteatoma limited to the middle ear and attic, supporting the endoscope's value in hidden recesses. Verified against PubMed record.

Cited in: Otoendoscopy and Otomicroscopy of the Diseased Ear

Head-to-head comparison of MERI, SPITE and OOPS in 179 ears; all correlated weakly with hearing outcome, with SPITE the only independent predictor of postoperative air-bone gap, though none strongly superior. Verified PubMed/CrossRef.

Cited in: Bellucci and SPITE: Grading Disease and Surgical Difficulty, Comparing Risk Scores: MERI, OOPS, and the EER, Limits of Classification: Toward International Outcome Comparison, An Evidence-Based Prosthesis Selection Algorithm

Anatomic and clinical study; the great auricular and lesser occipital nerve branches cross the postauricular groove and are at risk in a standard incision, and a modified incision that spares them reduces postoperative numbness. Verified on PubMed.

Cited in: The Postauricular Approach and Wide Exposure

Low-temperature deposition 3D printing of biodegradable PLGA / beta-tricalcium phosphate scaffolds shaped as ossicular columellae (1.5 mm diameter, 6.0 mm long) with interconnected 100-400 micrometre pores and roughly 83% porosity, loaded with about 0.7 micrograms/mm3 of BMP-2. The constructs withstood compression and stretching without permanent deformation, demonstrating that a degradable osteoinductive ossicular scaffold can be fabricated to physiological geometry. Chinese article with English abstract. Verified PMID 32791775.

Cited in: Biomimetic Scaffolds for Ossicular Regeneration

Review of mesenchymal stem cell strategies for tympanic-membrane regeneration, detailing the rationale for combining MSCs with scaffolds and growth factors and their paracrine, pro-angiogenic and pro-collagen effects on healing perforations. Primary source for the eardrum-regeneration section. Verified on PubMed (PMID 32126416) and CrossRef.

Cited in: Stem Cell Approaches to Middle Ear Reconstruction

Prospective HRCT-versus-surgery correlation in chronic otitis media with cholesteatoma. HRCT detection of cholesteatoma showed sensitivity 100%, specificity 88.1%, PPV 92.1%, NPV 100% and accuracy 95%; ossicular-erosion detection was accurate but correlation varied by ossicle (strong for malleus, good for incus and stapes, weakest for the stapes superstructure and fallopian canal). Used to ground the claim that segmentation/measurement is only as good as the underlying CT, which images bony erosion well but can under-call subtle stapes and soft-tissue disease. Verified DOI 10.1007/s12070-020-01892-z.

Cited in: From CT to Custom Implant: The Digital Pipeline

Broad clinical review of regenerative medicine across otolaryngology, framing the scaffold-cells-signals triad of tissue engineering and the current translational gap between preclinical promise and routine practice. Used to situate middle-ear regeneration within the wider field. Verified on PubMed (PMID 32349978) and CrossRef.

Cited in: Stem Cell Approaches to Middle Ear Reconstruction

Retrospective study of 127 pars flaccida cholesteatoma ears after primary intact canal wall tympanoplasty; postoperative aeration ratio in the mastoid cavity (measured on CT at the lateral semicircular canal level) was an independent predictor of satisfactory hearing, higher in the successful than the unsuccessful group. Verified on PubMed.

Cited in: Mastoidectomy as a Platform for Reconstruction

Longitudinal study of 103 patients completing the ZCMEI-21 before and after surgery for chronic middle ear disease; using an anchor-based global-rating-of-change method the minimal clinically important difference was estimated at about 5 points (mean preoperative 28.6, postoperative 21.8). A change of >=5 points is therefore needed for an alteration to be clinically meaningful, not merely statistically significant. Verified via PubMed.

Cited in: Patient-Reported Outcomes and Quality of Life

Conventional pure-tone-average air-bone gap reporting is weighted toward low frequencies; this series shows residual high-frequency (4-8 kHz) air-bone gaps persist after ossiculoplasty even when the standard four-frequency gap appears closed, so success thresholds can mask a high-frequency conductive deficit. Verified via PubMed.

Cited in: Pitfalls in Reporting and Comparing Hearing Results

Prospective study of 50 ears with unsafe CSOM comparing HRCT with operative findings. HRCT correlated well overall for ossicular erosion, scutum and tegmen erosion and mastoid status, but was least reliable for facial canal dehiscence (low sensitivity) and for soft-tissue characterisation. Verified on PubMed (PMID 33110811).

Cited in: High-Resolution CT of the Temporal Bone

Prospective study: ~67% of patients reported auricular numbness immediately after a postauricular incision, attributed to great auricular and lesser occipital nerve branches, with most recovering within months. Verified on PubMed/PMC9411327.

Cited in: The Postauricular Approach and Wide Exposure

Series of 141 patients, all with an intact stapes superstructure, reconstructed with a classic PORP, a ball-joint PORP, or a TORP bypassing the superstructure to the footplate. Compares hearing outcomes of partial versus total prostheses placed on the same favourable (superstructure-present) anatomy, informing whether to bridge to the stapes head or to the footplate when both options are mechanically available. Verified PMID 31077404, DOI 10.1002/lary.28060.

Cited in: PORP Versus TORP: Matching Prosthesis to Residual Chain

Comparison of preoperative temporal-bone HRCT with surgical findings in 145 ears: HRCT identified an anomaly in 62.1% but 37.9% read as normal still required exploratory tympanotomy; stapes fixation (alone or combined) accounted for 53.1% of cases. Establishes that a normal CT does not exclude a surgically correctable anomaly. Verified via PubMed.

Cited in: Reconstructing Congenital Ossicular Anomalies

Meta-analysis of 14 case series: the overall incidence of delayed facial palsy after middle-ear surgery was about 0.65%, mean onset 8.5 days postoperatively, and 95.3% of patients recovered completely. Supports the distinction between immediate and delayed palsy, the typical onset window, and the favourable prognosis of delayed palsy managed conservatively. Verified PubMed/CrossRef.

Cited in: Immediate Postoperative Complications

Operative series confirming the incus is the most susceptible ossicle to erosion in chronic otitis media, with the long and lenticular processes the most frequent sites.

Cited in: The Incus: Long Process Vulnerability and the Lenticular Joint

First-in-man report of image-guided robotic drilling of a keyhole tunnel through the temporal bone to the round window for cochlear implantation (the HEARO workflow). A CT-planned trajectory through the facial recess was drilled robotically with micrometre-precise navigation that safely bypassed the facial nerve and chorda tympani; all patients were implanted with no change in facial-nerve function. Source for the convergence of preoperative planning, navigation and robotics for submillimetric inner/middle ear access. Verified PMID 31374097, DOI 10.1371/journal.pone.0220543.

Cited in: Robotics and Navigation in Middle Ear Surgery

Retrospective comparison in 42 paediatric type 1 tympanoplasties found both temporalis fascia and tragal perichondrium suitable, each with about 83% anatomical success and no significant difference in functional results; perichondrium was favoured for reliability in the paediatric ear. Verified PMID 30878559 and DOI.

Cited in: Temporalis Fascia and Perichondrium Grafts

Micro-CT and synchrotron phase-contrast 3D reconstruction localising intraosseous lenticular vessels and implicating disrupted lenticular blood flow in post-stapedectomy incus necrosis.

Cited in: The Incus: Long Process Vulnerability and the Lenticular Joint, Blood Supply of the Ossicles and Ischemic Necrosis

Retrospective analysis of ossicular chain lesions in non-cholesteatomatous chronic otitis media. Both ossicular discontinuity and ossicular fixation produced larger preoperative air-bone gaps than an intact chain, and the type of lesion did not significantly alter the rate of successful gap closure after reconstruction, supporting the view that a fixed component can be addressed at the same operation as a discontinuity. Verified PMID 30924779.

Cited in: Combined Stapedotomy and Ossiculoplasty

Demonstrates RANKL expression by cholesteatoma perimatrix fibroblasts and an excess of osteoclasts on adjacent eroded bone, establishing the active cellular pathway of ossicular bone resorption.

Cited in: Blood Supply of the Ossicles and Ischemic Necrosis

Editorial review of transcanal endoscopic ear surgery summarising its wide-angle close-up advantages and its core limitations: obligatory one-handed instrumentation and intolerance of brisk bleeding. Verified on PubMed.

Cited in: The Transcanal Approach to the Middle Ear

Retrospective comparison showing ears reconstructed with an intact, prosthesis-coupled malleus achieved and maintained smaller air-bone gaps over long-term follow-up. Citation verified on PubMed (PMID 30540697).

Cited in: The Malleus: Manubrium, Head, and Tympanic Membrane Coupling

Contemporary narrative review of anaesthesia for middle-ear surgery; covers local versus general technique selection, TIVA, avoidance of nitrous oxide, the bloodless field, facial-nerve monitoring with light or no neuromuscular blockade, positioning, smooth emergence and PONV prophylaxis. Verified PubMed/CrossRef.

Cited in: Anaesthesia for Middle Ear Surgery: General and Local, Patient Positioning, Draping, and Microscope Setup

Prospective series of 200 tympanoplasties showing higher MERI correlates with larger residual air-bone gap and lower success. Verified PubMed/CrossRef.

Cited in: The Middle Ear Risk Index (MERI) Explained

Case report of transcanal in-office incudostapedial reconstruction with hydroxyapatite cement for a small joint erosion, with air-bone-gap closure sustained to 6 months. Illustrates the minimal, focal, dry-field scenario in which cement excels: a small bridging gap with an intact mobile stapes and good access. Verified PMID 31498550.

Cited in: Indications and Pitfalls of Glass Ionomer and HA Cement

First-in-human pilot of a silver-nanoparticle-enriched polymeric middle-ear prosthesis in three patients with ossicular discontinuity and chronic otitis media. Reported postoperative air-bone-gap improvement and favourable microbiological assessment without adverse reaction over the short follow-up. A proof-of-concept first clinical series, not a comparative trial. Verified PMID 30884249.

Cited in: Bioactive and Antibacterial Prosthesis Coatings

Comparison of Plastipore, hydroxyapatite and titanium in 61 PORP and 70 TORP cases. Hearing outcomes (ABG within 20 dB) did not differ significantly among materials within each prosthesis type, but titanium showed the lowest extrusion, most clearly in TORPs (titanium 4% vs hydroxyapatite 8% vs Plastipore 15%, p=0.019). Supports the recurring meta-analytic finding that material choice barely moves hearing but meaningfully moves extrusion. Verified PMID 29977838, DOI 10.1007/s12070-015-0952-2.

Cited in: Systematic Reviews and Meta-Analyses of Ossiculoplasty

National survey of musculoskeletal symptoms by ENT subspecialty: neck and shoulder were the most affected regions across surgery types, and 69.6% of those applying ergonomic principles reported symptom improvement. Verified on PubMed (PMID 28895155).

Cited in: Patient Positioning, Draping, and Microscope Setup

Paediatric revision ossiculoplasty series. Up to 40% of childhood reconstructions eventually need revision, yet revision still significantly improved pure-tone average, speech reception threshold and air-bone gap, with 14% regaining normal hearing. Confirms that revision remains worthwhile even when the index operation has failed. Verified PMID 29889783.

Cited in: Revision Ossiculoplasty for Failed Reconstruction

In-vivo proof of concept. Patient-specific scaffolds were 3D printed from endoscopic imaging of chinchilla perforations and implanted without sutures or glue (a self-retaining 'butterfly' geometry). Grafts loaded with epidermal growth factor achieved complete closure in 6/6 ears (100%), versus 3/4 (75%) for plain scaffolds and 1/4 (25%) for untreated controls, with histologic tissue integration and cellular infiltration. Demonstrates image-guided custom fit plus a bioactive cue accelerating native regeneration. Verified PMID 28726587.

Cited in: Tissue-Engineered Tympanic Membranes

175 ears (120 single-stage, 55 second-stage). Second-stage reconstruction gave significantly smaller air-bone gaps at 3 months (P<.001) and 2 years (P=.003), with the benefit greatest in canal-wall-down ears and primary surgery. Verified via PubMed.

Cited in: Primary Versus Staged Ossiculoplasty: Making the Call, Staging Strategy: The Healed Drum as a Prerequisite

Scoping review of eleven middle-ear and mastoid surgical classifications, confirming that Wullstein's 1956 scheme remains widely used and tracing how later systems built on it. Verified PubMed.

Cited in: Wullstein's Tympanoplasty Classification: Types I to V

Human temporal-bone histopathology of healed fascia grafts after successful subtotal/total drum replacement. The fascia did not significantly remodel, change thickness, or alter its fibrous structure, behaving as a durable connective-tissue scaffold rather than regenerating a trilaminar drum. Supports the biological rationale for fascia take. Verified PMID 29756238.

Cited in: Temporalis Fascia and Perichondrium Grafts

Human temporal-bone laser Doppler vibrometry study comparing PORP coupling sites. The best recovery of stapes vibration was found when the prosthesis contacted both the malleus handle and the tympanic membrane, outperforming single-point attachment. Supports the criterion that an ideal prosthesis should accommodate the malleus and couple efficiently to the drum. Verified PMID 29342039, DOI 10.1097/MAO.0000000000001699.

Cited in: Criteria for the Ideal Ossicular Prosthesis

Multicentre randomised controlled trial showing balloon dilation plus medical therapy normalised tympanograms in significantly more adults with dilatory ETD than medical therapy alone. Verified on PubMed.

Cited in: The Eustachian Tube and Middle Ear Ventilation

Transcanal endoscopic ossiculoplasty under local anaesthesia in 32 second-look ears (titanium PORP in 14, TORP in 6, autologous cartilage in 12); significant air-bone gap improvement, with extrusion seen only in titanium prostheses and none in the cartilage group over 4-8 years. Verified against PubMed record.

Cited in: Endoscopic Ossiculoplasty: Technique and Evidence

Retrospective comparison of incus interposition autograft versus titanium PORP in 115 patients. Hearing outcomes were broadly comparable between the sculpted autograft and the titanium alloplast, reinforcing that in favourable ears the material chosen is less decisive than middle-ear conditions and technique. Supports the modular point that, with cartilage protection and good selection, autograft and alloplast can give similar audiological results. Verified DOI 10.1111/coa.12942.

Cited in: Autograft Versus Alloplast: Choosing the Material

International consensus (SAMEO-ATO) framework that classifies the surgical approach (transcanal, transmeatal/endaural, retroauricular) as a distinct, reportable component of tympanomastoid surgery. Verified on PubMed.

Cited in: The Transcanal Approach to the Middle Ear

In-vivo evaluation of ABS and silver-nanoparticle-modified ABS otoimplants in rats at 4, 12, 24 and 48 weeks. The silver-modified implants were tolerated with reduced fibrous encapsulation, but some local toxicity of the silver toward middle-ear mucosa was observed, illustrating the narrow therapeutic window between antibacterial benefit and tissue toxicity for silver coatings. Verified PMID 30262741.

Cited in: Bioactive and Antibacterial Prosthesis Coatings

Systematic review of 14 studies (1,062 ears): a preserved chorda was symptomatic in 24%, versus 53% when stretched and 47% when sacrificed, supporting anatomical preservation during flap elevation and middle-ear work. Verified on PubMed.

Cited in: Raising the Tympanomeatal Flap Safely

Clinical study (n=92, 92% anatomical success) finding no significant correlation between cartilage graft size and degree of air-bone-gap improvement. Supports the view that within the range used clinically, graft area is not the dominant determinant of hearing outcome, even though vibrometry shows larger islands transmit high frequencies less well. Verified PMID 27502166.

Cited in: Acoustic Effects of Cartilage Thickness and Geometry

Diagnostic-accuracy study of tubomanometry: the opening-latency R value (R<=1 normal opening, R>1 delayed, R=0 no detectable opening) is sensitive for tubal opening but not specific for non-opening, underscoring the limits of any single dynamic test. Verified on PubMed.

Cited in: Assessing Eustachian Tube Function Before Surgery

Randomised trial comparing sculpted autologous incus with a titanium PORP for Austin type A defects, showing comparable air-bone gap closure between the patient's own incus and a modern alloplastic prosthesis.

Cited in: Grafts and Reconstruction Materials: Chapter Overview, Sculpted Autograft Incus Interposition, Autograft Versus Alloplast: Choosing the Material, Prostheses Types, Biomechanics and Selection: Chapter Overview, Choosing Autograft Versus Prosthesis by Defect Pattern

Cadaveric temporal-bone study: inadvertent drilling on the ossicular chain produced intracochlear pressures equivalent to ear-canal sound levels of 110-130 dB SPL, with peaks up to 165 dB SPL - direct evidence that ossicular contact transmits drill energy as acoustic trauma. Verified via PubMed.

Cited in: Sensorineural Hearing Loss After Ossiculoplasty

Systematic sensitivity study showing that finite-element predictions of human middle-ear mechanics depend strongly on chosen model definitions, geometry and material parameter values (e.g., Young's moduli and damping of the tympanic membrane, ligaments and joints), many of which are poorly constrained experimentally. Provides the key cautionary message that FE results are only as good as their inputs and must be validated against measurement—essential context for clinical interpretation. Verified PMID 27915026, DOI 10.1016/j.heares.2016.11.011.

Cited in: Finite Element Modeling of the Reconstructed Ear

116 single-stage cholesteatoma reconstructions; the intact-canal-wall technique gave better hearing outcomes than canal-wall-down, with the difference most evident at 1000 Hz. Verified via PubMed.

Cited in: Canal Wall Up Versus Canal Wall Down and Hearing

Histological companion study showing that mesenchymal-stem-cell-treated perforations heal with a trilaminar architecture closer to native eardrum (restored fibrous middle layer) than spontaneous or scaffold-only healing, concluding MSCs are good candidates for cell therapy of chronic perforations. Verified on PubMed (PMID 27960618) and CrossRef.

Cited in: Stem Cell Approaches to Middle Ear Reconstruction

Retrospective review of 120 pediatric ossicular chain reconstructions (2003-2014). PORP and titanium prostheses gave better postoperative PTA than TORP and other materials; only ~28% achieved a normal (<=25 dB) PTA and ~36% needed revision, most often for prosthesis displacement/extrusion. Verified via PubMed and CrossRef.

Cited in: Patient Selection in Pediatric and Bilateral Disease

Proof-of-concept cadaveric study. CT scans of the ear canal, tympanic membrane, ossicles and medial middle-ear wall were converted to CAD models (Mimics Innovation Suite) and a custom prosthesis was designed and 3D printed for each of several human temporal bones. Each prosthesis was uniquely matched to its intended temporal bone: four surgeons independently and correctly matched every prosthesis to its bone, a result with a 1:1296 chance of occurring randomly, demonstrating that printed prostheses faithfully capture individual middle-ear geometry. Argues custom printing could improve fit, reduce displacement and shorten operating time. Verified PMID 29782607, DOI 10.1186/s41205-017-0015-2.

Cited in: 3D-Printed Patient-Specific Prostheses, From CT to Custom Implant: The Digital Pipeline

Anatomic foundation for custom prosthesis design. Precise dimensions, weight and centre of gravity were measured from 19 cadaveric incudes and combined with literature data and micro-CT of temporal bones to build a parametric, rasterizable incus model. As proof of concept, incudal replacements were 3D printed in polylactic acid (PLA) and inserted into a cadaveric temporal bone, bridging the malleus-to-stapes gap. Establishes that biomimetic, anatomically derived geometry (not a generic columella) can be printed to fit. Verified PMID 28441229, DOI 10.1097/MAO.0000000000001403.

Cited in: 3D-Printed Patient-Specific Prostheses

Comparative report finding broadly equivalent graft success and hearing gain between endaural and postauricular tympanoplasty, with endaural offering a more direct line to the anterior annulus and a smaller external scar. Identifier not independently verified, so DOI/PMID omitted.

Cited in: The Endaural Approach: Incisions and Exposure

Experimental rat study applying glass ionomer cement directly to the facial nerve. Although clinical nerve function did not differ from controls over 14 days, the cement group showed significantly greater foreign-body reaction, granulation tissue and inflammation on histology, demonstrating the chronic tissue reaction that misuse of cement near nerve tissue can provoke. Verified PMID 28301982.

Cited in: Indications and Pitfalls of Glass Ionomer and HA Cement

Review of 169 studies (2005-2015) against the 1995 AAO-HNS reporting guideline: no publication met all ten criteria and only ~10% met seven to nine, quantifying why cross-study comparison is so difficult. Verified PubMed/CrossRef.

Cited in: Limits of Classification: Toward International Outcome Comparison

Series of 76 revision titanium ossicular chain reconstructions, many for displacement. A postoperative air-bone gap of 20 dB or less was achieved in about half (51.5%); the location of the original ossiculoplasty was the preoperative factor predicting revision success. Verified PMID 28397537.

Cited in: Revision Ossiculoplasty for Failed Reconstruction, Prosthesis Displacement, Tilting, and Refixation

139 ears reconstructed with a Fisch-style titanium incus prosthesis (mean follow-up 4.5 years): 7% extrusion and 18% reoperation overall; in the stable group, postoperative air-bone gap below 20 dB in 81% and below 10 dB in 25%. A modern alloplastic counterpart that shows why the autograft's near-zero extrusion is valued.

Cited in: Incus Interposition Step by Step

Of 328 ears, the high-frequency air-bone gap (4 kHz gap minus the mean of the 0.25 and 0.5 kHz gaps) predicted incomplete ossicular discontinuity with 83% sensitivity and 92% specificity. Provides the evidence for the down-sloping conductive pattern of a partial, soft-tissue-bridged disruption.

Cited in: How Ossicular Defects Degrade Sound Transmission, Pure-Tone Audiometry and the Air-Bone Gap, Audiologic Patterns: Discontinuity Versus Fixation

Reformatting in the Poschl (parallel) and Stenvers (perpendicular) planes raised the overall accuracy for superior canal dehiscence to 98.8% (AUC 0.988) versus standard axial and coronal planes. Verified against the PubMed record.

Cited in: Imaging Ossicular Erosion, Fixation, and Dehiscence

Human study linking a weaker middle ear muscle reflex to noise-induced tinnitus despite normal audiograms, supporting a contributory protective role of a robust reflex.

Cited in: Tensor Tympani and Stapedius: Protective Muscle Reflexes

Tissue-engineered autologous mucosal epithelial cell sheets transplanted onto denuded middle-ear bone accelerated mucosal regeneration and suppressed bone hyperplasia and granulation tissue in experimental and early clinical work, a direct attempt to solve Schuring's mucosal-regeneration problem rather than the strut. Verified via the publisher (npj Regenerative Medicine) and CrossRef.

Cited in: Regenerative Medicine for Ossicular Tissue, Future Perspectives and Unmet Needs in Hearing Restoration

Two-centre retrospective comparison of 62 ears with ossicular discontinuity (31 endoscopic, 31 microscopic); controlling for prosthesis type, endoscopic ossicular chain reconstruction yielded audiometric outcomes (PTA, air-bone gap, word recognition) similar to the microscopic approach. Verified against PubMed record.

Cited in: Endoscopic Ossiculoplasty: Technique and Evidence

In-vitro evaluation of an acrylonitrile-butadiene-styrene (ABS) middle-ear prosthesis loaded with silver nanoparticles. Silver ions were released continuously, increasing with time and nanoparticle concentration; the material showed bactericidal efficacy against Staphylococcus aureus and Pseudomonas aeruginosa with no fibroblast cytotoxicity in this assay. Demonstrates the silver-elution antibacterial coating concept for an ossicular prosthesis. Verified DOI 10.3390/molecules22101681.

Cited in: Bioactive and Antibacterial Prosthesis Coatings

Prospective cohort of 312 ears: 16 (5.1%) developed postoperative SNHL; 15 of 16 were operated by trainees, identifying surgeon experience as the dominant risk factor. Verified via journal DOI.

Cited in: Sensorineural Hearing Loss After Ossiculoplasty

Comprehensive developmental review of the pharyngeal-arch origins of the ossicles and the neural-crest contribution to the malleus, incus, and stapes superstructure; the stapes footplate carries a dual mesodermal/otic-capsule origin. Verified via PubMed (PMID 26227955).

Cited in: Embryology of the Ossicles: Branchial Arch Origins

Development and validation of the ZCMEI-21, a 21-item disease-specific quality-of-life inventory for chronic otitis media (subscales for ear symptoms, hearing function, mental/emotional impact and medical resources), scored so that a higher total reflects worse quality of life. Excellent internal consistency (Cronbach's alpha ~0.91) and strong correlation (r=0.74) with a single direct quality-of-life question. Verified via PubMed.

Cited in: Patient-Reported Outcomes and Quality of Life

Detailed reconstruction of human malleus and incus development from first and second pharyngeal arch (Meckel and Reichert) cartilage. Citation verified on PubMed (PMID 27456698).

Cited in: The Malleus: Manubrium, Head, and Tympanic Membrane Coupling, Embryology of the Ossicles: Branchial Arch Origins

Retrospective comparison of single-stage and second-look strategies for canal-wall-up cholesteatoma. Recidivism after planned second look was low and the cost of routine second look high; the authors recommend the second look be individually tailored rather than universal. Verified via PubMed.

Cited in: Reconstruction in the Cholesteatoma Ear

Large single-centre experience (>2600 patients) describing four-quadrant infiltration of the external canal at the bony-cartilaginous junction with lidocaine and adrenaline for haemostasis and analgesia. Verified on publisher (Egypt J Otolaryngol).

Cited in: Patient Positioning, Draping, and Microscope Setup

Clinical series of 66 ears plus temporal-bone experiments showing partial discontinuity (segments still bridged by soft tissue) produces a greater loss of stapes velocity and air-bone gap at high frequencies than at low, explaining the high-frequency-dominant conductive loss of partial erosion.

Cited in: How Ossicular Defects Degrade Sound Transmission

Controlled mouse study applying bone-marrow mesenchymal stem cells in a hyaluronic-acid scaffold to chronic tympanic-membrane perforations, reporting accelerated closure and a thicker, more organised neomembrane than scaffold alone. Key preclinical efficacy signal for cell-based eardrum repair. Verified on PubMed (PMID 26980912) and CrossRef.

Cited in: Stem Cell Approaches to Middle Ear Reconstruction

Long-term single-centre series confirming that the cartilage shoe gives durable central anchorage of a titanium TORP on the bare footplate after type III tympanoplasty, with low displacement and stable hearing. The rectangular shoe fitting tightly between the stapedial crura provided reliable coupling; the authors advocate the technique for dependable long-term total ossiculoplasty results. Verified PMID 27541000.

Cited in: Intraoperative Tricks for Prosthesis Stabilization

Five-year series of iatrogenic facial nerve injuries during mastoid surgery; the tympanic and pyramidal (second-genu) segments were the commonest sites, and injury was usually caused by disorientation and drilling without identifying landmarks. Emphasises constant orientation, the lateral semicircular canal and digastric ridge as guides, low burr speed, copious irrigation and avoiding diathermy near the nerve. Verified on PubMed (PMC5020572).

Cited in: Principles of Complication Avoidance in Ear Surgery

Editorial review arguing for a selective rather than routine second-stage policy in cholesteatoma, weighing residual-disease detection against the morbidity of a planned re-operation. Verified via PubMed.

Cited in: Primary Versus Staged Ossiculoplasty: Making the Call

Micro-CT anatomical study: dehiscence of the tympanic segment in 66.7% of specimens, most often in the inferior wall above and slightly behind the oval window; defects mostly 0.5-1.4 mm; frequently bilateral. Verified on PubMed.

Cited in: The Facial Nerve in the Middle Ear: Course and Surgical Hazards

Foundational bench study behind the PhonoGraft concept. Multi-material 3D printing produced composite grafts with circumferential and radial filament architectures (8- or 16-filament designs) from PDMS, flex-PLA and PCL, infilled with a fibrin-collagen hydrogel. Laser Doppler vibrometry and digital opto-electronic holography showed organised, native-like surface motion across 0.2-10 kHz with far less specimen-to-specimen variability than temporalis fascia, and the constructs retained 85-90% of load-bearing capacity versus ~30% for fascia. Establishes that a biomimetic radial/circumferential lattice reproduces native vibratory mechanics. Verified PMID 26994661.

Cited in: Tissue-Engineered Tympanic Membranes

Clinical cohort of 40 ears comparing a tissue-engineered silk fibroin patch against conventional perichondrium myringoplasty for chronic perforations. Closure rates, closure times, complication rates and postoperative hearing gain were similar between groups, but operative time, otorrhoea and intraoperative dizziness were significantly better with the patch. Shows a bioengineered scaffold can match autograft closure while removing the donor-site and handling burden. Verified PMID 27297322.

Cited in: Tissue-Engineered Tympanic Membranes

Comprehensive review of clinically relevant middle ear anatomy, including the facial nerve, oval window, round window and the structures at surgical risk during reconstruction. Verified on PubMed (PMC4718166).

Cited in: The Tympanic Cavity: Walls, Recesses, and Surgical Landmarks, The Facial Nerve in the Middle Ear: Course and Surgical Hazards, Temporal Bone Surgical Anatomy for the Otologist, The Endaural Approach: Incisions and Exposure, Raising the Tympanomeatal Flap Safely, Tympanic Membrane Elevation and Annulus Management, Principles of Complication Avoidance in Ear Surgery

Meta-analytic review of cadaveric ossicular morphometry; documents the wide reported range of malleus total length (~7.6-8.2 mm) and manubrium length (~4.1-4.8 mm). Citation verified on PubMed (PMID 26767074) and CrossRef.

Cited in: The Malleus: Manubrium, Head, and Tympanic Membrane Coupling

Case series of iatrogenic facial nerve injuries during mastoid surgery; most occur in the tympanic segment and second genu. Reviews the landmarks that protect the nerve. Verified on PubMed (PMC5020572).

Cited in: Temporal Bone Surgical Anatomy for the Otologist

Describes how transcanal endoscopy addresses the anterior canal blind spot that historically forced an endaural or postauricular conversion; useful for situating the endaural route among modern alternatives. Verified on PubMed.

Cited in: The Endaural Approach: Incisions and Exposure, Raising the Tympanomeatal Flap Safely, Tympanic Membrane Elevation and Annulus Management, Recent Advances and Future Directions: Chapter Overview

Systematic review of non-echo-planar diffusion-weighted MRI for postoperative cholesteatoma; high pooled sensitivity and specificity, but limited for lesions below ~3 mm. The evidence base for substituting imaging surveillance for the planned second-look operation. Verified via PubMed.

Cited in: Reconstruction in the Cholesteatoma Ear

Prospective pediatric series of class III (mobile-footplate) congenital ossicular malformations reconstructed with Teflon piston, PORP or TORP, documenting favourable air-bone gap closure and the practical reconstructive choices when malleus or incus elements are deficient. Verified via PubMed.

Cited in: Reconstructing Congenital Ossicular Anomalies

Review of temporal bone CT and MRI: submillimetre HRCT is the workhorse for bony detail of the ossicles, scutum, tegmen, facial canal and labyrinth, while DWI MRI characterises soft tissue and is decisive for residual/recurrent cholesteatoma. Verified on PubMed (PMID 25476171).

Cited in: High-Resolution CT of the Temporal Bone

Prospective-database review of titanium ossiculoplasty in patients with an intact, mobile stapes (56 PORP, 27 TORP). When inferior rotation of the stapes or a shallow middle-ear cleft makes a PORP awkward, a TORP placed onto the footplate alongside the intact superstructure gave hearing results not significantly different from PORP and stable beyond 12 months. Shows that when the superstructure is present but geometrically unfavourable, a TORP is an acceptable alternative. Verified PMID 26595718.

Cited in: Prognostic Factors and Realistic Patient Counseling, Prostheses Types, Biomechanics and Selection: Chapter Overview, TORP Design and Biomechanics, PORP Versus TORP: Matching Prosthesis to Residual Chain, PORP onto a Mobile Stapes Superstructure

Chart review of TORP ossiculoplasty with (53 ears) or without (108 ears) a titanium stapes footplate prosthesis seated in the oval window. The footplate-prosthesis group closed the pure-tone-average air-bone gap to within 20 dB in 69.8% versus 44.4%, with fewer displacements, demonstrating that a stable footplate platform materially improves coupling when reconstruction must rest on the footplate. Verified PMID 25550225.

Cited in: TORP Design and Biomechanics, TORP onto the Stapes Footplate, Combined Stapedotomy and Ossiculoplasty, Intraoperative Tricks for Prosthesis Stabilization

Retrospective review of 127 ossiculoplasties using hydroxyapatite bone cement, setting out a reconstruction philosophy that reserves cement for short incudostapedial defects with a mobile stapes and uses a prosthesis when the gap is long or the stapes superstructure is absent. Verified PMID 24615652.

Cited in: Bone Cement Ossiculoplasty for Short Defects

Prospective operative series of 279 ears finding the incus the most frequently eroded ossicle (lenticular process 12.5%, long process 9.6%), stapes superstructure next (11.1%) and the malleus the most resistant (4.7%).

Cited in: Blood Supply of the Ossicles and Ischemic Necrosis

Significant high-frequency SNHL (chiefly 2 kHz) at 24 h in 23% of tympanoplasty-only ears versus 48% of mastoidectomy ears; persistent bone-conduction depression at 6 months in 16% of the mastoidectomy group. Verified via PubMed.

Cited in: Sensorineural Hearing Loss After Ossiculoplasty

Historical account of Julius Lempert, who popularised the endaural incision and the endaural one-stage fenestration operation, performing controlled drill-powered mastoid dissection under magnification. Verified on PubMed (PMC4361616).

Cited in: The Endaural Approach: Incisions and Exposure

Comparative review of titanium versus hydroxyapatite ossiculoplasty. Both biocompatible alloplasts gave broadly comparable hearing and anatomical outcomes, reinforcing that contemporary inert materials perform similarly once they survive the middle-ear environment and that material choice is secondary to ear status and technique. Verified PMID 29391971.

Cited in: Material Science of the Middle Ear Environment

67 costal-cartilage ossiculoplasties in cholesteatoma ears; mean air-bone gap improved from 39.2 dB to 25.4 dB (P<0.001). The only significant prognostic factor was technique: intact-canal-wall ears achieved better post-operative gaps than canal-wall-down ears. Verified via PubMed.

Cited in: Reconstruction in the Cholesteatoma Ear

Single-centre retrospective experience of glass ionomer cement in 444 patients over 1995-2006 with follow-up to 16 years, chiefly for stapes-prosthesis fixation and ossicular reconstruction. Documents the material's utility in small, dry-field applications and frames the indications and limits that emerged after the early aluminium-toxicity reports. Verified PMID 25209434.

Cited in: Indications and Pitfalls of Glass Ionomer and HA Cement

n=30 isolated malleus fixation; canalplasty with diamond burr to clean sclerotic plaques. Postoperative ABG <=20 dB in 80% (26.6% <=10 dB) at 12 months; ABG 38.95->16.10 dB.

Cited in: Managing Malleus Head Fixation and Epitympanic Disease

International consensus defining eustachian tube dysfunction as a syndrome and codifying its subtypes (dilatory, baro-challenge-induced, patulous) and the elements of clinical diagnosis. Verified on PubMed (PMC4600223).

Cited in: The Eustachian Tube and Middle Ear Ventilation, Assessing Eustachian Tube Function Before Surgery

Systematic review of eustachian tube function tests (tympanometry, Valsalva/Toynbee, inflation-deflation, tubomanometry, sonotubometry, ETDQ-7) concluding that no single test is a gold standard and that assessment must triangulate several measures. Verified on PubMed.

Cited in: The Eustachian Tube and Middle Ear Ventilation, Assessing Eustachian Tube Function Before Surgery

Adaptation and ex vivo testing of the Micron handheld tremor-cancelling micromanipulator for stapedotomy, a representative middle ear microsurgical task demanding accurate manipulation in narrow spaces. Comparison of manual versus Micron-assisted footplate fenestration showed significantly reduced tremor amplitude with the active instrument. Source linking handheld active tremor compensation to ossicular/stapes surgery. Verified PMID 26737386, DOI 10.1109/EMBC.2015.7319486.

Cited in: Robotics and Navigation in Middle Ear Surgery

Systematic review of bone cement (glass ionomer and hydroxyapatite) for ossicular chain reconstruction and revision stapes surgery. Air-bone-gap closure to within 20 dB was achieved in 60-94% of patients, and cement did not underachieve relative to conventional rebridging; no infection or extrusion was reported across the included ossiculoplasty studies, supporting cement as a viable option for small gaps. Verified PMID 25154873.

Cited in: Bone Cement Ossiculoplasty for Short Defects, Indications and Pitfalls of Glass Ionomer and HA Cement

Full 3-D measurement of malleus and incus motion showing multiple frequency-dependent modes: a single rotation axis dominates at low frequency, with translation and additional rotational modes emerging at higher frequencies. Verified PubMed/CrossRef.

Cited in: Biomechanics of the Ossicular Chain in Motion

136 titanium TORP cases (74 with a footplate shoe, 62 without). The footplate-shoe group had a smaller mean postoperative air-bone gap (17.7 vs 21.6 dB) and greater gap closure (21.9 vs 13.2 dB), confirming a stabilising footplate device improves and helps maintain hearing. Verified on PubMed.

Cited in: TORP onto the Stapes Footplate

Biomechanical model of cervical-spine load by forward head/neck flexion: a neutral head loads the spine at ~5 kg (10-12 lb), rising to ~12 kg at 15 degrees, ~18 kg at 30 degrees and ~27 kg (60 lb) at 60 degrees. Quantifies the cost of microscope-induced neck flexion. Verified on PubMed (PMID 25393825).

Cited in: Patient Positioning, Draping, and Microscope Setup

Sequential-force loading of the stapes footplate in human temporal bones via laser vibrometry; shows the annular ligament has progressive (nonlinear) stiffening and inhomogeneous stiffness distribution. Verified via PubMed.

Cited in: The Stapes and Oval Window: Superstructure, Crura, and Footplate

Seven consecutive canal-wall-down cholesteatoma reconstructions using Tutoplast-processed (solvent-dehydrated, gamma-irradiated) cadaveric malleus allografts. Mean air-bone gap improved from 33±7 dB to 14±6 dB at 25 months. Illustrates a modern, industrially sterilised allograft processing route intended to address the transmission concern. Verified via PubMed/PMC.

Cited in: Homograft Ossicles and Tympano-Ossicular Allografts

Documents the high prevalence of tympanic-segment facial canal dehiscence in chronically diseased ears, a hazard during tympanomeatal-flap elevation in revision and canal-wall-down cavities. Verified on PubMed (PMC3797195).

Cited in: Raising the Tympanomeatal Flap Safely

Development and initial validation of the COMQ-12, a 12-item disease-specific quality-of-life questionnaire for active chronic otitis media; each item scored 0-5 (total 0-60) with a lower score meaning better quality of life, covering symptom severity, work and lifestyle impact, health-service use and general discomfort. Subsequent prospective work shows it is the most responsive disease-specific instrument to surgical treatment. Verified via PubMed.

Cited in: Patient-Reported Outcomes and Quality of Life

Examines whether the titanium prosthesis head can sit directly against the undersurface of a healthy tympanic membrane without an interposed cartilage cap. In favourable middle-ear conditions direct titanium-to-drum contact gave acceptable extrusion rates, framing the nuanced question of when the cartilage cap is mandatory versus optional. Verified PMID 24492139.

Cited in: Cartilage Interposition at the Prosthesis-Drum Interface, Titanium Ossicular Prostheses: Light, Stiff, and MRI-Safe, TORP onto the Stapes Footplate

Human cadaveric temporal-bone study using stroboscopic holography and laser-Doppler vibrometry across twelve reconstruction variants. Reconstruction reduced tympanic-membrane volume displacement, and the largest high-frequency reductions occurred with a large oval of cartilage interposed between the drum and the prosthesis head, quantifying the acoustic cost of an oversized cartilage cap. Verified PMID 24847945.

Cited in: Mass, Stiffness, and Coupling in Reconstructed Chains, Cartilage Interposition at the Prosthesis-Drum Interface

Review of biocement (hydroxyapatite and glass-ionomer) rebridging for isolated incudostapedial erosion: air-bone gap closure to within 20 dB in roughly 80-94% of cases, with low infection and extrusion. Verified on PubMed.

Cited in: Grafts and Reconstruction Materials: Chapter Overview, Prostheses Types, Biomechanics and Selection: Chapter Overview, PORP Design and Biomechanics, Reconstruction Techniques by Defect Pattern: Chapter Overview

Long-term follow-up (mean 65.5 months) of cholesteatoma cases reconstructed with an autoclaved incus autograft, concluding that thermal sterilisation of the harvested incus before reimplantation is a safe primary reconstruction with acceptable recurrence rates.

Cited in: Sculpted Autograft Incus Interposition, Robotics and Navigation in Middle Ear Surgery

Retrospective series of only-hearing-ear surgery; argues that disease eradication and amplification take priority over reconstruction and that elective hearing-restoration surgery in an only-hearing or poor-reserve ear is approached with extreme caution. Verified PubMed.

Cited in: Absolute and Relative Contraindications, Patient Selection in Pediatric and Bilateral Disease

Retrospective long-term series of ossiculoplasty with autogenous mastoid cortical bone sculpted as a columella. Mean air-bone gap fell from 31.6 dB pre-operatively to 20.3 dB post-operatively (canal-wall-up 30.8 to 19.9 dB; canal-wall-down 33.0 to 21.0 dB) and remained stable over 3-6 years, with no cases of extrusion, necrosis or resorption observed. Supports cortical bone as a durable, biocompatible strut material. Verified PMID 25248969.

Cited in: Cortical Bone Autograft Columellae, Harvesting Cartilage, Fascia, and Bone Grafts

Retrospective titanium series in which most extrusions related to tympanic-membrane retraction rather than to absent cartilage, framing the cartilage shield as protective chiefly in unfavourable ears. Verified on PubMed.

Cited in: Grafts and Reconstruction Materials: Chapter Overview

Measures the viscoelastic stiffness and damping of the human stapedial annular ligament, the dominant compliance term in the conductive chain.

Cited in: Suspensory Ligaments and Synovial Joints of the Ossicles

Scanning electron microscopy of middle-ear mucosa demonstrated bacterial biofilm in chronic otitis media, present in all patients with a recent discharge history (100%) and absent in cochlear-implant controls. Establishes chronic otitis media as a biofilm-associated disease, the basis for persistent low-grade inflammation and the substrate that a prosthesis surface can support. Verified PMID 24427714.

Cited in: Material Science of the Middle Ear Environment

Comparison of 49 incus interpositions with 50 bone-cement rebridgings: successful closure (air-bone gap < 20 dB) in 63.2% of interpositions versus 78% of cement repairs, with greater mean hearing gain in the cement group for short long-process defects.

Cited in: Sculpted Autograft Incus Interposition, Malleus-Present, Stapes-Present Reconstruction, Incus Interposition Step by Step

Study under TIVA with propofol and remifentanil showing that minimal neuromuscular blockade (train-of-four >1) is sufficient to preserve facial-nerve electromyographic responses during otologic microsurgery; supports keeping relaxant light or absent when facial-nerve monitoring is used. Verified PubMed/CrossRef.

Cited in: Anaesthesia for Middle Ear Surgery: General and Local

Retrospective long-term series of 50 patients with severe ossicular defects and mixed hearing loss treated with an active middle-ear implant (floating mass transducer) coupled to the round-window membrane, showing durable functional gain where conventional reconstruction is unfavourable. Verified on PubMed (PMID 23585147) and CrossRef.

Cited in: Recent Advances and Future Directions: Chapter Overview

Finite-element modelling attributing the notch to suppression of an ossicular (inertial) resonance near 1.5-2 kHz when the stapes is fixed; both compressional and inertial bone-conduction pathways are required to reproduce the notch. Verified via AIP/CrossRef.

Cited in: Carhart's Notch and Bone Conduction Artifacts

Endoscopic surgical anatomy of the tympanic cavity walls and protympanum/eustachian region. Verified on PubMed.

Cited in: The Tympanic Cavity: Walls, Recesses, and Surgical Landmarks

89 ears reconstructed with the titanium Kurz TTP-Variac PORP: mean ABG improved from 26.2 to 15.6 dB with success in 73%; on multivariable analysis preservation of the malleus was independently associated with better functional outcome. Verified on PubMed/CrossRef.

Cited in: Malleus-Coupling and Notched Prosthesis Designs

Defines the clinical triad of incomplete ossicular discontinuity: a high-frequency-dominant conductive loss, fluctuation, and transient improvement after a Valsalva manoeuvre, distinguishing partial from complete discontinuity.

Cited in: The Stapes and Oval Window: Superstructure, Crura, and Footplate, How Ossicular Defects Degrade Sound Transmission

Early artificial neural network applied to chronic suppurative otitis media; the network correctly predicted whether postoperative hearing improved in ~84% of the test set, outperforming a k-nearest-neighbour model and suggesting a nonlinear input-outcome relationship. Verified PubMed/CrossRef.

Cited in: AI-Driven Outcome Prediction and Risk Modeling

Systematic review concluding that current evidence is insufficient to support the Carhart notch as a reliable diagnostic test for otosclerosis. Verified via PubMed.

Cited in: Carhart's Notch and Bone Conduction Artifacts

Meta-analysis of 40 studies (4,311 ears): on average PORP reconstruction onto a present stapes head was more effective than a footplate-seated TORP (combined risk ratio 1.28, 95% CI 1.17-1.41), partly because an absent superstructure marks a more diseased ear. Verified on PubMed.

Cited in: Prostheses Types, Biomechanics and Selection: Chapter Overview, PORP Design and Biomechanics, TORP Design and Biomechanics, PORP Versus TORP: Matching Prosthesis to Residual Chain, An Evidence-Based Prosthesis Selection Algorithm, Reconstruction Techniques by Defect Pattern: Chapter Overview, PORP onto a Mobile Stapes Superstructure, TORP onto the Stapes Footplate, Reconstruction on a Mobile Versus Fixed Footplate

Uses a comprehensive FE model of the human ear (canal, middle ear and a spiral cochlea) to predict wideband energy absorbance and relate it to middle-ear structure in normal ears and in disorders such as otosclerosis and ossicular interruption. Illustrates how FE models can simulate diseased and reconstructed states and connect mechanical changes to clinically measurable acoustic immittance. Verified PMID 23274858, DOI 10.1016/j.heares.2012.12.005.

Cited in: Finite Element Modeling of the Reconstructed Ear

Comparative study of underlay tympanoplasty with temporalis fascia versus tragal perichondrium/cartilage. Temporalis fascia achieved roughly 84% graft uptake with 76% hearing improvement; tragal perichondrium achieved comparable uptake and hearing, with the authors favouring cartilage-perichondrium for ease of harvest and durability. Verified PMID 23120407.

Cited in: Temporalis Fascia and Perichondrium Grafts

Development and validation of the 7-item ETDQ-7 symptom score (range 7-49; item mean of 2.1, i.e. composite >= 14.5, distinguishes ETD from controls). The first validated patient-reported instrument for eustachian tube dysfunction. Verified on PubMed (PMC3612400).

Cited in: Assessing Eustachian Tube Function Before Surgery

Systematic review of iatrogenic chorda tympani injury: the nerve is most often injured during middle-ear surgery, after which at least 15-22% of patients report symptoms (taste change and oral dryness); deliberate division is often better tolerated than stretching. Supports the anatomical vulnerability of the chorda and the counselling around division versus traction. Verified PubMed/CrossRef.

Cited in: Immediate Postoperative Complications

Foundational engineering paper describing the design specifications, kinematic structure, optimisation and evaluation of a teleoperated robotic assistance system for middle ear surgery (a precursor of the RobOtol concept). Establishes the rationale that middle ear microsurgery requires submillimetric precision on the smallest, most fragile bones of the body, that tool-tissue interaction forces are very low (< 1 N) and hard to perceive, and that outcomes depend heavily on surgeon dexterity. Verified PMID 22927789, DOI 10.1100/2012/907372.

Cited in: Robotics and Navigation in Middle Ear Surgery

Systematic review of 14 studies (1,475 patients) comparing cartilage with temporalis fascia. Cartilage gave significantly better morphological (anatomical take) outcomes with no significant difference in hearing; revision was needed in roughly 10% of cartilage versus 19% of fascia ears, quantifying the durability advantage of the cartilage shield. Verified PMID 22643445.

Cited in: Cartilage Shield and Palisade Tympanoplasty

Surgically confirmed cohort (stapes fixation, ossicular discontinuity and superior canal dehiscence) showing that power-reflectance and umbo-velocity measures, combined with the audiometric air-bone gap, help separate the stiffness lesion of fixation from the mass/compliance signature of discontinuity behind an intact drum.

Cited in: Audiologic Patterns: Discontinuity Versus Fixation, Tympanometry and Impedance Audiometry

Review of multifrequency / resonance-frequency tympanometry: stiffening lesions such as otosclerosis raise the middle-ear resonance frequency, whereas mass-loading or decoupling lesions such as ossicular discontinuity and effusion lower it, giving better discrimination than single-frequency tympanometry. Verified CrossRef (PMC3696161).

Cited in: Tympanometry and Impedance Audiometry

Retrospective comparison of hydroxyapatite bone-cement bridging (10 ears) against incus remodelling (14 ears) for incudostapedial discontinuity. The cement group showed significantly greater air-bone gap gain at 6 and 12 months and a higher rate of closure to 20 dB, with no adverse reactions, framing cement as a faster, easier alternative for the small-gap discontinuity. Verified PMID 21935632.

Cited in: Indications and Pitfalls of Glass Ionomer and HA Cement

Clinical and phantom evaluation of optical and electromagnetic navigation systems in temporal bone surgery, reporting application/target accuracies generally below 1 mm and emphasising that registration method and fiducial placement drive reliability. Supports the statement that contemporary otologic navigation reaches around 0.5-1 mm accuracy and that navigation supplements but does not replace anatomical knowledge. Verified PMID 21695469, DOI 10.1007/s00405-011-1683-y.

Cited in: Robotics and Navigation in Middle Ear Surgery

Twenty-three ears with congenital ossicular anomalies and a mobile footplate (class 3) reconstructed by interposition or prosthesis: mean air-conduction gain 17 dB (47 to 30 dB), mean postoperative air-bone gap 19 dB (from 38 dB), with a 3 dB mean sensorineural deterioration. Verified via PubMed.

Cited in: Reconstructing Congenital Ossicular Anomalies

Series of 144 otological operations: ~11% intraoperative facial canal dehiscence, most at the second genu, horizontal segment and oval window niche; CT had a 19% false-negative and 30.7% false-positive rate, so imaging cannot exclude dehiscence. Verified on PubMed.

Cited in: The Facial Nerve in the Middle Ear: Course and Surgical Hazards

Randomised comparison of two TORP-stabilisation methods when the malleus is absent in canal-wall-down ears. A cartilage-split stabiliser lodging the shaft gave 72% closure to within 20 dB and a mean gap of 20.2 dB versus 59% and 24.4 dB for the Huttenbrink cartilage-shoe method (P less than 0.05), confirming that a fixed lateral stabiliser improves results when no malleus is available.

Cited in: Malleus-Absent Reconstruction Strategies

21 patients followed 20-35 years (mean 26.8) after a cortical bone columella replaced the stapes. Best post-operative air-bone gap of 4.97 dB (from 33.81 dB) deteriorated only slowly (mean 0.93 dB/year), and the deterioration was attributed mainly to age-related sensorineural decline rather than columella failure; 20 of 21 remained successful. Evidence of extreme durability of a well-seated bone strut. Verified PMID 21132321.

Cited in: Cortical Bone Autograft Columellae

Comparative study of the heat-activated nitinol SMart piston versus manual-crimp Fisch-type prostheses. Air-bone gap closure was equivalent (SMart 25.1 to 8.2 dB; Fisch-type 28.1 to 9.0 dB; both P<.001), but operative time was substantially shorter with the SMart piston: 21.2 +/- 2.4 minutes versus 28.9 +/- 3.2 minutes (P<.001), roughly a 27% reduction. Source for the operative-time advantage of self-crimping. Verified PMID 21303595 (no DOI in record).

Cited in: Self-Crimping and Smart Stapes Prosthesis Systems

Direct measurement in healthy adults showing transmucosal CO2 exchange is roughly eight times faster than O2 exchange across the middle-ear mucosa. Verified on PubMed.

Cited in: Middle Ear Mucosa, Gas Exchange, and Mucosal Health

Comparative series of 106 ears with chronic otitis media, middle-ear adhesions and intact ossicles undergoing single-stage tympanoplasty: those receiving Silastic had significantly better air-conduction, bone-conduction and air-bone-gap averages at one year. Verified on PubMed.

Cited in: Maintaining Middle Ear Aeration and Preventing Adhesions

Malleus relocation used to manage incus necrosis during revision stapes surgery: air-bone gap closed to within 10 dB in 58.3% and to within 20 dB in 83.3%, with hearing stable over a mean 23.5 months.

Cited in: Remodeling and Repositioning Native Ossicular Remnants

Historical and anatomical review establishing that the lenticular process is connected to the long process by a thin bony pedicle rather than being a separate fourth ossicle.

Cited in: The Incus: Long Process Vulnerability and the Lenticular Joint

Evaluation of a superelastic (rather than heat-activated) nitinol stapes prosthesis whose loop self-closes by superelasticity, without thermal activation. Fixation was simpler than with the heat-activated SMart piston, and hearing outcomes were similar (long-term gap improvement around 27-28 dB). Distinguishes the two nitinol mechanisms; notes the fixed loop diameter is not equally suited to all incus diameters. Verified PMID 21997589, DOI 10.1097/MAO.0b013e3182355886.

Cited in: Self-Crimping and Smart Stapes Prosthesis Systems

Radiologic-embryologic review mapping ossicular derivatives to the first and second arches and to Treacher Collins, hemifacial microsomia, and branchio-oto-renal spectra. Verified via PubMed (PMID 20299437).

Cited in: Embryology of the Ossicles: Branchial Arch Origins

153 ears with congenital ossicular anomaly or otosclerosis; the 2-kHz bone-conduction dip occurred at similar rates across stapes fixation, incudostapedial detachment and malleus/incus fixation, so the Carhart notch is a mechanical artefact of fixation but not specific for stapes fixation.

Cited in: How Ossicular Defects Degrade Sound Transmission, Pure-Tone Audiometry and the Air-Bone Gap, Carhart's Notch and Bone Conduction Artifacts

Meta-analysis pooling reported series of ossiculoplasty using bone cement, summarising air-bone gap closure to within 20 dB in roughly 70-90% of cases across the literature and confirming favourable short-defect outcomes when the technique is applied to an intact mobile stapes. Used here for the pooled success-rate range. DOI not independently confirmed; pooled outcome range corroborated by Wegner 2015.

Cited in: Bone Cement Ossiculoplasty for Short Defects

Endoscopic perspective on the compartments, epitympanic diaphragm and retrotympanic recesses, the basis of the modern sinus tympani classification. Verified on PubMed (PMC3102170).

Cited in: The Tympanic Cavity: Walls, Recesses, and Surgical Landmarks, Temporal Bone Surgical Anatomy for the Otologist, Endoscopic Ossiculoplasty: Technique and Evidence

Systematic review of chorda tympani injury in middle-ear surgery: roughly 15-22% of patients report taste or oral symptoms, severity rises with degree of nerve manipulation, and most recover gradually. Verified on PubMed.

Cited in: Tympanic Membrane Elevation and Annulus Management

Describes the endaural incision and a conchal-bowl meatoplasty performed through it; 64 patients with satisfactory functional and cosmetic outcomes. Verified on PubMed.

Cited in: The Endaural Approach: Incisions and Exposure

Cadaveric temporal-bone study of 18 pistons (9 nitinol self-crimping, 9 manually crimped) judged from blinded photographs by 10 otolaryngologists. Nitinol loops were 'mostly circular' in 8 of 9 versus 3 of 9 manual crimps (P<.05), and 6 of 9 nitinol prostheses contacted more than 66% of the incus long process versus 3 of 9 manual. Provides the objective basis for the claim that heat-activated crimping is more circular, circumferential and reproducible than manual crimping. Verified PMID 23724262, DOI 10.5402/2011/932849.

Cited in: Self-Crimping and Smart Stapes Prosthesis Systems

Consecutive series of stapedotomy/stapedectomy for isolated congenital stapes footplate fixation (Teunissen-Cremers class 1): mean air-conduction gain 21 dB (46 to 25 dB), mean postoperative air-bone gap 14 dB; ABG closed to 20 dB or less in 29 of 39 ears (74%) and to 10 dB or less in 46%. Pre-existing sensorineural impairment limited final hearing. Verified via PubMed.

Cited in: Reconstructing Congenital Ossicular Anomalies

585 ears with an intact mobile stapes and malleus: a malleus-to-footplate TORP with malleus relocation gave a mean residual air-bone gap of 8.9 dB and closure within 10 dB in ~69%, versus 13.1 dB and 54% for a PORP onto the stapes head, supporting a footplate-seated column even when the superstructure is present. Verified on PubMed.

Cited in: Malleus-Coupling and Notched Prosthesis Designs, Malleus-Present, Stapes-Present Reconstruction, Malleus-Absent Reconstruction Strategies, Reconstruction on a Mobile Versus Fixed Footplate, Impact of Malleus and Stapes Status on Results

Patient-derived 3D finite-element model built from CT data and solved by harmonic response analysis to test total ossicular replacement prosthesis (TORP) placement. Found that the best simulated hearing restoration is obtained when the TORP foot is positioned on the center of the stapes footplate and when the footplate is preserved, directly translating FE output into a surgical placement recommendation. Verified PMID 22201262, DOI 10.3109/00016489.2011.633229.

Cited in: Finite Element Modeling of the Reconstructed Ear

Preoperative CT of the tympanic facial canal agreed with operative findings in 67 of 76 ears (~88%); combined axial, coronal and sagittal review raises the detection rate of dehiscence. Verified against the PubMed record.

Cited in: Imaging Ossicular Erosion, Fixation, and Dehiscence

Stroboscopic opto-electronic holography of whole-surface tympanic-membrane motion in cadaveric temporal bones before and after placing a 6 x 3 mm posterior cartilage graft (0.5 or 1.0 mm). Cartilage reduced apposed-membrane motion, most markedly at 4 kHz and 7-8 kHz, and middle-ear input impedance was unchanged or slightly raised. Direct experimental confirmation that the cost of cartilage is concentrated in the high frequencies. Verified PMID 19909803.

Cited in: Acoustic Effects of Cartilage Thickness and Geometry

97 titanium ossiculoplasties; ABG <=20 dB in 86.5% of PORP vs 54.5% of TORP cases. Preoperative stapes-superstructure status drove the result; age, cholesteatoma, retraction pocket, mastoid surgery type and cartilage thickness did not - prosthesis title (PORP vs TORP) reflects anatomy, not a material effect. Verified via PubMed.

Cited in: Prognostic Factors Revisited: What Drives Outcome

Reflective overview of ossiculoplasty in which Austin (echoing the long-recognised teaching attributed to Schuring) argues that the future of the field rests more on solving ancillary problems, eustachian tube function foremost, than on prosthesis technique. Verified via CrossRef (ScienceDirect S1043181010000151).

Cited in: Assessing Eustachian Tube Function Before Surgery

105 ossicular chain reconstructions analysed for prognostic factors. An intact malleus handle, smaller preoperative air-bone gap, and procedure type were the predictors of success; the intact malleus handle emerged as a key structural determinant of outcome. Grounds the defect-by-defect argument that the presence of the malleus handle (type A/B versus C/D) changes both the geometry and the achievable result. Verified PMID 20015752, DOI 10.1016/j.amjoto.2009.02.014.

Cited in: Choosing Autograft Versus Prosthesis by Defect Pattern

Operative otology text covering tympanomastoid exposure, canal-wall-up versus canal-wall-down decisions and combined approach tympanoplasty for which the postauricular corridor is the workhorse. ISBN verified via publisher.

Cited in: The Postauricular Approach and Wide Exposure

Operative otology reference describing cortical mastoidectomy, modified radical and radical mastoidectomy, the canal-wall-up versus canal-wall-down decision and combined-approach tympanoplasty as the platform on which ossicular reconstruction is performed. ISBN verified via publisher.

Cited in: Mastoidectomy as a Platform for Reconstruction

Randomized controlled trial of 123 ears comparing cartilage palisade tympanoplasty with temporalis fascia. Morphological success at 24 months was 82% with palisade cartilage versus 64% with fascia (p=0.03), with no significant difference in hearing, establishing higher take and retraction resistance for the palisade shield with comparable function. Verified PMID 20418792.

Cited in: Cartilage Shield and Palisade Tympanoplasty

Cadaveric measurement of the facial-nerve-to-chorda-tympani angle (mean 23.6°) and distances defining the facial recess for posterior tympanotomy. Verified on PubMed.

Cited in: Temporal Bone Surgical Anatomy for the Otologist

Standard otologic operative reference describing the postauricular approach, temporalis fascia harvest, vascular strip and tympanomeatal flap technique. ISBN verified via publisher and J Laryngol Otol book notice.

Cited in: The Postauricular Approach and Wide Exposure

Seven ears with tympanosclerotic stapes fixation reconstructed by stapedectomy plus a cartilage-connecting hydroxyapatite column to the oval window: the air-bone gap closed to within 20 dB in six of seven, best at low and mid frequencies, with no sensorineural loss, illustrating combined fenestration-and-reconstruction in one stage. Verified on PubMed.

Cited in: Reconstruction on a Mobile Versus Fixed Footplate

Wideband, power-based acoustic reflex measurement showing robust stapedius reflex thresholds across frequency and lower thresholds for wideband noise than tones.

Cited in: Tensor Tympani and Stapedius: Protective Muscle Reflexes

171 chronic otitis media ears having staged ossiculoplasty (38 canal-wall-up, 133 canal-wall-down). Post-operative air-bone gap closure was 10.9 dB (CWU) versus 13.5 dB (CWD), not significantly different (P=0.21); the authors concluded mastoidectomy type did not by itself determine hearing. Verified via PubMed.

Cited in: Canal Wall Up Versus Canal Wall Down and Hearing

Comparative cohort with second-stage ossiculoplasty: mean air-bone gap closure 10.9 dB (CWU) vs 13.5 dB (CWD), not significant (P=0.21); ABG within 20 dB in 68.4% (CWU) vs 58.6% (CWD), not significant (P=0.25). Concludes mastoidectomy type did not itself affect hearing results. Verified on PubMed/PMC3010539.

Cited in: Mastoidectomy as a Platform for Reconstruction

Review of the anaesthetic priorities specific to otologic surgery: a bloodless surgical field, head positioning, facial-nerve preservation, nitrous-oxide considerations and management of postoperative nausea; outlines benefits and drawbacks of local versus general anaesthesia. Verified PubMed/CrossRef.

Cited in: Anaesthesia for Middle Ear Surgery: General and Local

Defines the epitympanic diaphragm, tympanic isthmus and tensor fold as the regulators of attic ventilation and the engine of selective attic disease. Verified on PubMed.

Cited in: The Tympanic Cavity: Walls, Recesses, and Surgical Landmarks, Temporal Bone Surgical Anatomy for the Otologist, Otoendoscopy and Otomicroscopy of the Diseased Ear

Comprehensive review of the anatomy and brainstem circuitry of the stapedius and tensor tympani, including innervation (VII and V3) and the predominantly stapedius-driven, bilateral middle ear muscle reflex in humans.

Cited in: Tensor Tympani and Stapedius: Protective Muscle Reflexes

Scanning laser Doppler vibrometry of the human stapes footplate decomposing motion into piston and two rocking components; rocking grows with frequency and approaches the piston near 4 kHz. Verified PubMed/CrossRef.

Cited in: Biomechanics of the Ossicular Chain in Motion

Clinical series demonstrating endoscopic access to hidden recesses (sinus tympani, facial recess, anterior epitympanum) to reduce residual disease. Verified on PubMed.

Cited in: The Tympanic Cavity: Walls, Recesses, and Surgical Landmarks, Otoendoscopy and Otomicroscopy of the Diseased Ear, Endoscopic Versus Microscopic Reconstruction

Development and validation of the COMOT-15, a 15-item disease-specific quality-of-life instrument for chronic otitis media with three subscales (ear symptoms, hearing function, mental health) plus single questions on overall impact and doctor visits. Excellent internal consistency (Cronbach's alpha 0.89-0.91), high retest reliability (r>0.8), and discriminates chronic otitis media patients from healthy controls. Verified via PubMed.

Cited in: Patient-Reported Outcomes and Quality of Life

Series confirming cartilage palisade/island tympanoplasty gives high closure rates and resistance to recurrent retraction in ears prone to atelectasis, with hearing comparable to fascia. Verified on PubMed (PMC2689568).

Cited in: Maintaining Middle Ear Aeration and Preventing Adhesions

Histological and micro-CT morphometry of 270 temporal bones describing the pedicle-and-plate architecture of the lenticular process and its fibrous incudostapedial capsule.

Cited in: The Incus: Long Process Vulnerability and the Lenticular Joint, Suspensory Ligaments and Synovial Joints of the Ossicles

Fourteen-year follow-up of 42 ears reconstructed with Plastipore (porous polyethylene) PORPs and TORPs. Successful hearing (air-bone gap 20 dB or less) was achieved in 65% overall (68.8% PORP, 62.5% TORP), with a mean air-bone gap improvement of 25.5 dB and a low extrusion rate of 4.7% when cartilage shielding was used. Verified PMID 19887882.

Cited in: Fluoroplastic and Teflon Prosthesis Designs

Larger comparative series of the SMart nitinol piston versus conventional prostheses. Air-bone gap closed to within 10 dB in 78.3% and within 20 dB in 94.2% of SMart cases, comparable to conventional prostheses (84.2% and 98.0%; no significant difference); mean gap improvement about 18.7 dB. Concludes the nitinol SMart is safe and reliable and eliminates manual crimping without altering audiometric outcome, with longer follow-up recommended. Verified PMID 19816231, DOI 10.1097/MAO.0b013e3181be645d.

Cited in: Self-Crimping and Smart Stapes Prosthesis Systems

Ossiculoplasty series correlating the Middle Ear Risk Index, including ossicular status, with hearing outcome; higher risk scores (greater ossicular loss, absent malleus/stapes elements) predict poorer air-bone gap closure.

Cited in: The Ossiculoplasty Outcome Parameter Staging (OOPS) Index, Impact of Malleus and Stapes Status on Results, Applying and Validating Prognostic Scoring Systems

Anatomical correlation linking the watershed vascular supply of the lenticular process to post-surgical incus necrosis.

Cited in: Foundations and Anatomy of the Middle Ear: Chapter Overview

In-vitro study in which titanium, hydroxyapatite and plastic prostheses (23 each) were cultured with Pseudomonas aeruginosa for 96 hours and biofilm quantified by electron microscopy and viable counts. Titanium formed significantly less biofilm than plastic and hydroxyapatite, with no difference between HA and plastic; correction for surface area did not change the result. Provides the rationale that prosthesis material and surface influence biofilm load. Verified PMID 19880023.

Cited in: Bioactive and Antibacterial Prosthesis Coatings, Future Perspectives and Unmet Needs in Hearing Restoration

Clinical study of prostheses retrieved at revision surgery from twelve patients; 67% showed microscopic biofilm, but middle-ear scarring scores and hearing outcomes did not differ between biofilm and non-biofilm prostheses. An important counterweight showing that detectable biofilm on a retrieved implant does not automatically equate to clinical failure, tempering enthusiasm for antibacterial coatings. Verified PMID 19779385.

Cited in: Bioactive and Antibacterial Prosthesis Coatings

Histologic study of 86 temporal bones showing the incudostapedial joint is a bichambered diarthrodial joint divided by a fibrous articular disk, with a remarkably delicate lenticular process.

Cited in: Suspensory Ligaments and Synovial Joints of the Ossicles

Histochemical mapping of the pars tensa lamina propria: an outer radial fibre layer dominated by collagen type II and an inner circumferential layer enriched in type III relative to type II, with type II most abundant overall and the fibrous annulus showing type I/II/III zonation. Provides the native target architecture - oriented radial and circumferential collagen - that biomimetic engineered drums attempt to reproduce for native-like vibration. Verified PMID 19806063.

Cited in: Tissue-Engineered Tympanic Membranes

Validates the Symons-Fanning CT grading of otosclerosis by site of involvement (fenestral fissula ante fenestram versus retrofenestral cochlear), with excellent inter- and intra-observer agreement. Verified against the PubMed record.

Cited in: Imaging Ossicular Erosion, Fixation, and Dehiscence

PORP reconstructions onto an intact malleus handle and stapes superstructure gave reliable air-bone gap closure largely independent of mucosal inflammation. Citation verified on PubMed (PMID 19531170).

Cited in: The Malleus: Manubrium, Head, and Tympanic Membrane Coupling, Middle Ear Pathology, Atelectasis, and Outcome

Demonstrates measurable, mostly transient changes in cochlear function attributable to drill noise, reinforcing that ossicular contact and high burr speeds are avoidable acoustic-trauma risks. Verified on PubMed.

Cited in: Principles of Complication Avoidance in Ear Surgery

First simultaneous scala vestibuli and scala tympani pressure measurements in human temporal bones; shows the differential (oval-window minus round-window) pressure is the true cochlear input, confirming the footplate as the terminus of the hydraulic transformer. Verified via PubMed.

Cited in: The Areal Ratio: Tympanic Membrane to Footplate Hydraulic Gain

Retrospective surgical series of 265 ears: fallopian canal dehiscence commonest with cholesteatoma, predominantly in the tympanic segment over the oval window. Verified on PubMed.

Cited in: The Facial Nerve in the Middle Ear: Course and Surgical Hazards

122 patients; notches distributed 31% at 0.5 kHz, 32% at 1 kHz, 37% at 2 kHz, and 81% showed overclosure after stapedotomy maximal at 1 and 2 kHz (mean 7.5 and 8.3 dB). Notch morphology is variable, not exclusively at 2 kHz. Verified via PubMed.

Cited in: Carhart's Notch and Bone Conduction Artifacts

Demonstrates that otosclerotic (fixed) ears show reduced low-frequency energy absorbance and a shallow, low-admittance tympanometric pattern, whereas a mobile but disrupted chain tends to be hypercompliant. Grounds the type As (fixation) versus type Ad (discontinuity) tympanometric distinction in measured immittance data.

Cited in: Audiologic Patterns: Discontinuity Versus Fixation, Tympanometry and Impedance Audiometry

Proof-of-concept animal study. An rhBMP-2/atelocollagen composite placed against the tympanic membrane in a rat model formed new bone by a process resembling intramembranous ossification, was stable and durable without inflammatory reaction, and re-established hearing as shown by recovery of ABR thresholds. The central demonstration that a growth-factor-loaded scaffold can regrow a vibrating ossicular substitute in vivo. Verified PMID 18404714.

Cited in: Regenerative Medicine for Ossicular Tissue

Describes the cartilage 'shoe' (an oval ~2.5 x 3.5 mm cartilage plate with a central hole) seated in the oval niche to centre and stabilise a titanium TORP on the smooth, socketless mobile footplate, countering the tilting and dislocation that are major causes of footplate-seated prosthesis failure. Verified on PubMed.

Cited in: TORP Design and Biomechanics, TORP onto the Stapes Footplate, Reconstruction on a Mobile Versus Fixed Footplate, Intraoperative Tricks for Prosthesis Stabilization

Direct micrometer measurement of 12 formalin-fixed human stapes; reports footplate length/width, total height, and inter-crural geometry. Verified via PubMed.

Cited in: The Stapes and Oval Window: Superstructure, Crura, and Footplate

Review arguing the disease-transmission fear may be disproportionate for ossicles specifically: there has never been a documented case of HIV or transmissible spongiform encephalopathy attributed to homograft ossicle use alone, and the two reported otological CJD cases involved cadaveric dura mater and pericardium for drum grafting, not ossicles. Urges continued vigilance, donor screening and sterilisation rather than abandonment. Verified via PubMed/Cambridge Core.

Cited in: Homograft Ossicles and Tympano-Ossicular Allografts

Third-window mechanism (e.g. superior canal dehiscence) produces an inner-ear air-bone gap that mimics ossicular conductive loss, often with supranormal (negative) bone-conduction thresholds and preserved acoustic reflexes - the key audiometric masquerader to exclude before middle-ear surgery. Verified PubMed/CrossRef.

Cited in: Pure-Tone Audiometry and the Air-Bone Gap

52 patients with auricular cartilage harvest from concha, tragus or scapha. Early morbidity was dominated by haematoma (6.7%) and sensory impairment (3.3%); at long-term follow-up sensory impairment was the most frequent finding (12.9%) and was confined to the conchal donor site, with mean ear length/width differences of only 1.8/2.5 mm. Quantifies the modest, mostly conchal donor-site morbidity of ear cartilage harvest. Verified PMID 18176208.

Cited in: Harvesting Cartilage, Fascia, and Bone Grafts

199 ossiculoplasties with >5-year follow-up; success fell from 61.3% at 6 months to 54.3% at 5 years, demonstrating that the follow-up interval at which results are reported materially changes the apparent success rate. Verified via PubMed.

Cited in: Prognostic Factors and Realistic Patient Counseling, Outcomes, Prognosis and Complications: Chapter Overview, Pitfalls in Reporting and Comparing Hearing Results

Biomechanics reference establishing that middle-ear sound transfer depends on the precise three-dimensional geometry, mass and stiffness of the ossicular chain and its coupling to the tympanic membrane and stapes. Provides the mechanistic justification for why anatomy-matched prosthesis length, alignment and mass matter and why a printed device must respect native kinematics, not merely fill a gap. Verified PMID 19914361, DOI 10.1016/j.heares.2009.10.013.

Cited in: From CT to Custom Implant: The Digital Pipeline

Laser-Doppler vibrometry of stapes footplate velocity in eight human temporal bones reconstructed with and without the malleus. Reconstruction without the malleus tended to be slightly worse at 0.6 to 3.0 kHz, but the difference did not reach statistical significance, suggesting the clinical malleus advantage is partly mechanical stability rather than a large intrinsic acoustic gain.

Cited in: Impact of Malleus and Stapes Status on Results

Micro-CT morphometry of the human malleus-incus complex giving ossicular dimensions, masses, and the geometry of the rotational axis. Verified PubMed/CrossRef.

Cited in: Anatomy of the Ossicular Chain: Malleus, Incus, and Stapes

Large silicone sheets spanning eustachian tube to mastoid after soft-wall reconstruction gave good CT-confirmed mastoid aeration in 59.7% of ears versus 24.2% of controls, demonstrating that a maintained gas pathway aids re-aeration. Verified on PubMed.

Cited in: Maintaining Middle Ear Aeration and Preventing Adhesions

Retrospective comparison of 94 laser stapedectomies (47 heat-activated nitinol vs 47 manual-crimp). Short-term and long-term air-bone gaps, long-term pure-tone averages and long-term gap closure were all significantly better with heat-activated crimping, attributed to more reproducible three-dimensional positioning. The authors explicitly flag nickel-allergy considerations, possible late loosening of the heat-activated crimp, and long-term incus changes as items needing longitudinal study. Verified PMID 18359364, DOI 10.1016/j.otohns.2007.12.015.

Cited in: Self-Crimping and Smart Stapes Prosthesis Systems

Classifies cartilage tympanoplasty into six groups (palisades/strips/slices; foils and plates; perichondrium-cartilage island grafts; total pars-tensa composite grafts; island grafts for anterior/subtotal perforations; special methods). Supplies the shared geometric vocabulary - plate versus palisade versus island - underpinning the acoustic comparisons. Verified PMID 19041498.

Cited in: Tympanic Membrane Reconstruction and Prosthesis Coupling, Cartilage Shield and Palisade Tympanoplasty, Cartilage Interposition at the Prosthesis-Drum Interface, Acoustic Effects of Cartilage Thickness and Geometry

Original description of the heat-activated 'SMart' nitinol piston: a fluoroplastic (Teflon) vestibular end on a nitinol wire shaft whose loop self-crimps around the long process of the incus when warmed to about 60 degrees C with a disposable Thermal Tip. Implanted in 42 stapedotomy and 7 malleostapedotomy cases (2003-2004); scanning electron microscopy of temporal bones confirmed the loop uniformly surrounded the ossicle without dead spaces. Establishes the self-crimping mechanism, the heat-activation temperature, and improved loop-incus interface. Verified PMID 17245045, DOI 10.1159/000098806.

Cited in: Self-Crimping and Smart Stapes Prosthesis Systems

Temporal-bone histopathology of retrieved ossicular implants. Porous-plastic (Plastipore/Polycel) implants showed a foreign-body giant-cell reaction visible as early as two months, with particulate plastic inside the giant cells and microdegradation that increased with time, leading the authors to caution against continued otologic use of porous plastic. The histologic basis for abandoning these materials. Verified PMID 17419521.

Cited in: Biocompatibility, Resorption, and Foreign Body Response, Lessons from Abandoned Materials: Plastipore and Ceravital, Revision Ossiculoplasty for Failed Reconstruction, Prosthesis Displacement, Tilting, and Refixation, Delayed Complications and Late Failure

Temporal-bone and finite-element study showing how fixation versus detachment of the superior and anterior malleal ligaments changes tympanic-membrane and stapes motion.

Cited in: Suspensory Ligaments and Synovial Joints of the Ossicles

Demonstrated the Glasgow Benefit Plot used prospectively to predict and counsel on binaural benefit in stapes surgery, reinforcing that whether an ear is the better or worse ear governs perceived benefit. Verified via PubMed.

Cited in: Belfast, Glasgow, and AAO-HNS Reporting Standards

140 titanium ossiculoplasties (PORP and TORP). Multivariate analysis identified the absence of the malleus as an adverse prognostic factor; the malleus contributes both lateral stability to the construct and a catenary-lever acoustic gain. Success defined as postoperative air-bone gap within 20 dB.

Cited in: Impact of Malleus and Stapes Status on Results

Mathematical model establishing that a larger mastoid air-cell volume slows the rate of pressure change from transmucosal gas diffusion, acting as a gas reservoir that buffers the cleft. Verified on PubMed.

Cited in: Middle Ear Mucosa, Gas Exchange, and Mucosal Health

Finite-element model coupling ear canal, middle ear and cochlear fluid, used to ground the end-to-end energy pathway from drum to traveling wave.

Cited in: Sound Transmission from Drum to Cochlear Fluids

Documents frequent transient taste disturbance after middle ear surgery whether the chorda is preserved or divided, and the gradual recovery of function, informing the decision to preserve versus deliberately divide a stretched nerve. Verified on PubMed.

Cited in: Principles of Complication Avoidance in Ear Surgery

24 ears undergoing planned two-stage tympanoplasty for cholesteatoma; mean inter-stage interval 8.3 months (range 6-12). The incus stored in the mastoid bowl was recoverable in all cases and usable as a columella in 19; no residual cholesteatoma arose at the storage site. Verified via PubMed.

Cited in: Staging Strategy: The Healed Drum as a Prerequisite

Clinical comparison of titanium prostheses differing in weight; found no clinically meaningful hearing difference attributable to mass, consistent with bench data that modest mass changes are subordinate to stiffness, tension, and coupling.

Cited in: Mass, Stiffness, and Coupling in Reconstructed Chains

Comparative series of 54 otosclerosis patients (26 nitinol SMART, 28 conventional stainless-steel/platinum-ribbon). Postoperative pure-tone average (24.8 vs 27.5 dB HL) and residual air-bone gap (7.1 vs 6.4 dB) were statistically indistinguishable. Concludes experienced surgeons achieve comparable audiometric results with both, with self-crimping offering handling advantages; notes nickel allergy as a selection consideration. Verified PMID 17414180, DOI 10.1097/MAO.0b013e3180340a1d.

Cited in: Self-Crimping and Smart Stapes Prosthesis Systems

Series of 52 ears reconstructed with a full thickness cartilage shield in type III tympanoplasty. Graft take was achieved in all patients, mean hearing improvement 11.2 dB, with postoperative air-bone gap below 20 dB in 54% and below 25 dB in 79%, demonstrating that a solid cartilage shield supports the prosthesis interface with acceptable acoustic cost. Verified PMID 17582695.

Cited in: Cartilage Shield and Palisade Tympanoplasty

Retrospective comparison of 168 patients reconstructed with hydroxyapatite versus titanium PORPs and TORPs. Both materials gave good functional results and low extrusion with no statistically significant hearing difference, with only non-significant trends favouring hydroxyapatite in total and titanium in partial reconstruction. Anchors the central message that material choice is secondary to coupling and the middle-ear environment. Verified PMID 17529851.

Cited in: Hydroxyapatite Prostheses and Osseointegration, Bioactive and Composite Prosthesis Coatings

Review and series of 30 ossicular reconstructions for tympanosclerotic fixation (mean follow-up 4.3 years). Discusses staged surgery, the high refixation tendency of mobilized ossicles, and a preference for cartilage-shielded reconstruction and prostheses over simple mobilization of attic or stapes fixation. Used for refixation risk and staging discussion. Verified PMID 17963670.

Cited in: Ossiculoplasty in Tympanosclerosis

The International Society for Cellular Therapy consensus that defines a mesenchymal stromal cell by three minimal criteria: plastic adherence; expression of CD105, CD73 and CD90 with absence of haematopoietic markers (CD45, CD34, CD14/CD11b, CD79alpha/CD19, HLA-DR); and trilineage differentiation to osteoblasts, adipocytes and chondrocytes. Anchors the terminology and identity of the cells discussed in this module. Verified on PubMed (PMID 16923606) and CrossRef.

Cited in: Stem Cell Approaches to Middle Ear Reconstruction

Extends the Gan 3D ear model with a fully coupled acoustic-structural formulation so that air in the ear canal and middle-ear cavity is solved together with the vibrating tissues. Computes sound-pressure distributions in the canal and cavity and their effect on tympanic-membrane and ossicular vibration across frequency. Demonstrates that realistic boundary conditions (cavity air load, canal acoustics) are needed for accurate predictions—an important methodological caveat for prosthesis simulations. Verified PMID 16122964, DOI 10.1016/j.medengphy.2005.07.018.

Cited in: Finite Element Modeling of the Reconstructed Ear

Authoritative review of ossiculoplasty principles, techniques and prognostic factors, emphasising disease control, a dry ventilated middle ear and intraoperative flexibility in prosthesis selection. Verified via PubMed.

Cited in: The Surgical Philosophy of Ossicular Chain Reconstruction

Comparison of concurrent versus staged ossicular reconstruction; staging gave better air-bone gaps in open cavities with an absent stapes superstructure (the inflamed, high-risk environment), whereas concurrent reconstruction sufficed for closed cavities with intact stapes. Verified PubMed.

Cited in: Primary Versus Staged Ossiculoplasty: Making the Call, Staging Strategy: The Healed Drum as a Prerequisite, Middle Ear Pathology, Atelectasis, and Outcome

Histopathological classification of acquired malleus head fixation into normal bone, non-tympanosclerotic bone remodelling, and localised tympanosclerotic foci.

Cited in: Managing Malleus Head Fixation and Epitympanic Disease

Temporal-bone and clinical study showing perforation-induced conductive loss is frequency-dependent and worst at low frequencies, scales with perforation size, and is larger for a given size in a smaller middle-ear/mastoid volume. Explains why an intact, well-sealed drum and adequate aeration are prerequisites for the transformer and for prosthesis coupling. Verified PMID 16436981.

Cited in: Tympanic Membrane Reconstruction and Prosthesis Coupling, Prognostic Factors Revisited: What Drives Outcome

111 titanium PORP/TORP procedures: PORP residual air-bone gap 14.3 dB versus 25.2 dB for TORP, with gap within 20 dB in 77% of PORP versus 52% of TORP ears; extrusion 1.8%. Presence of the stapes and a canal-wall-preserving approach were the main predictors of a good result. Verified on PubMed.

Cited in: PORP Design and Biomechanics, Coupling and Stability at the Prosthesis Interfaces

Prospective database study of 3,050 primary stapedotomies for otosclerosis, with the air-bone gap closed to within 10 dB in 94.2% and a low rate of severe sensorineural loss. Provides the benchmark hearing and safety profile of isolated stapedotomy against which combined stapedotomy-plus-ossiculoplasty results should be judged, and underpins the gentle, footplate-protective technique. Verified PMID 16985478.

Cited in: Combined Stapedotomy and Ossiculoplasty

242 procedures with long-term follow-up showing that late failure of ossiculoplasty is driven mainly by the underlying otitis media, eustachian-tube dysfunction and middle-ear environment rather than the prosthesis, supporting careful patient selection. Verified on PubMed.

Cited in: Indications for Ossiculoplasty: When to Reconstruct, Absolute and Relative Contraindications, Primary Versus Staged Ossiculoplasty: Making the Call, Prognostic Factors and Realistic Patient Counseling, Tympanic Membrane Elevation and Annulus Management, Canal Wall Up Versus Canal Wall Down and Hearing, Staging Strategy: The Healed Drum as a Prerequisite, Malleus-Present, Stapes-Present Reconstruction, Malleus-Absent Reconstruction Strategies, PORP onto a Mobile Stapes Superstructure, Outcomes, Prognosis and Complications: Chapter Overview, Pitfalls in Reporting and Comparing Hearing Results, Prognostic Factors Revisited: What Drives Outcome, Impact of Malleus and Stapes Status on Results

Compared an incus-to-stapes (I-S) cement bridge for an absent long/lenticular process against a malleus-to-stapes (M-S) bridge for an absent incus. The I-S bridge across a short defect performed well, whereas the longer M-S span was less reliable, defining bone cement as a technique best suited to short rather than long gaps. Verified PMID 15891635.

Cited in: Bone Cement Ossiculoplasty for Short Defects

Tertiary-centre case series of 25 difficult ossicular reconstructions using Mimix hydroxyapatite bone cement: as the sole material for incus long-process erosion, to secure or augment a prosthesis, and in revision and primary stapedotomy. Establishes HA cement as an excellent adjunct or alternative to preformed prostheses for small, focal gaps because it is malleable, rapidly setting and rapidly hardening. Verified PMID 15886626.

Cited in: Bone Cement Ossiculoplasty for Short Defects, Indications and Pitfalls of Glass Ionomer and HA Cement

Landmark review establishing that a tissue-engineering scaffold must simultaneously satisfy competing mechanical and mass-transport requirements, and that computational topology design with solid free-form (additive) fabrication can produce designer architectures whose stiffness and porosity are tuned to the target tissue. Provides the engineering rationale for matching scaffold modulus to host bone and for the interconnected porosity needed for ingrowth. Verified PMID 16003400, DOI via CrossRef.

Cited in: Biomimetic Scaffolds for Ossicular Regeneration

Pictorial review of normal temporal-bone canals, sutures and vascular variants that mimic erosion or dehiscence on axial CT, underscoring the need to know normal anatomy before calling a defect. Verified against the PubMed record.

Cited in: Imaging Ossicular Erosion, Fixation, and Dehiscence

In vitro demonstration that image-guided otologic navigation referenced to a minimally invasive bone-anchored fiducial frame achieves submillimetre target registration error (mean 0.73 +/- 0.25 mm) within the temporal bone. Establishes that submillimetre navigation accuracy is technically achievable and that an accuracy under 1 mm is the working benchmark for otologic image guidance. Verified PMID 15746858, DOI 10.1016/j.otohns.2004.09.141.

Cited in: Robotics and Navigation in Middle Ear Surgery

Survey of 32 otologic surgeons across 12 clinics who performed 400 titanium ossiculoplasties, comparing the titanium implant against gold, ceramic and autograft alternatives on intraoperative handling (positioning, length adjustment, intraoperative visibility through the open head, coupling stability). The titanium implant was rated significantly superior on all handling measures. Supports the claim that shapeability, lightness and an open head make titanium easy to position precisely. Verified PMID 15871581 (no DOI in record).

Cited in: Titanium Ossicular Prostheses: Light, Stiff, and MRI-Safe

Human temporal bone pressure-gain measurements plus clinical audit: across 0.5-3 kHz the malleus-to-footplate construct out-performed the malleus-to-stapes-head construct by ~6 dB in the laboratory and 7.6 dB in the clinical air-bone gap, supporting a footplate-seated column even when a stapes head exists. Verified on PubMed.

Cited in: Reconstruction on a Mobile Versus Fixed Footplate

Series of 137 ossiculoplasties with sculpted autologous or homologous incus interposition: mean air-bone gap fell from 26.8 to 18.6 dB, 66.4% closed to within 20 dB, no extrusions, and results were stable over a mean 15.8 months (mean change -0.2 dB).

Cited in: Indications for Ossiculoplasty: When to Reconstruct, Prognostic Factors and Realistic Patient Counseling, Planning for Intraoperative Surprises and Prosthesis Readiness, Canal Wall Up Versus Canal Wall Down and Hearing, Sculpted Autograft Incus Interposition, Cortical Bone Autograft Columellae, Autograft Versus Alloplast: Choosing the Material, Remodeling and Repositioning Native Ossicular Remnants, Malleus-Present, Stapes-Present Reconstruction, Incus Interposition Step by Step, Choosing Autograft Versus Prosthesis by Defect Pattern

Comparison of the Belfast Rule of Thumb and Glasgow Benefit Plot against patients' own assessment of hearing, illustrating how binaural reporting methods can disagree with air-bone gap-based success. Verified via PubMed.

Cited in: Belfast, Glasgow, and AAO-HNS Reporting Standards

Serial-section study clarifying that the stapes superstructure derives from the second-arch (Reichert) blastema around the stapedial artery, while the vestibular/medial footplate arises from the otic capsule (lamina stapedialis). Verified via PubMed (PMID 16050903).

Cited in: Embryology of the Ossicles: Branchial Arch Origins

Long-term ossiculoplasty cohort identifying middle-ear atelectasis, irreversible mucosal change and a hostile environment as leading causes of late failure — the conditions a staged strategy in cholesteatoma seeks to optimise before reconstruction. Verified via PubMed.

Cited in: Reconstruction in the Cholesteatoma Ear

Retrospective series in which incudostapedial disarticulation was reconstructed with bone cement. The air-bone gap improved from a preoperative mean near 33 dB to roughly 10 dB postoperatively, with no extrusion or infection, establishing bone cement as a workhorse for short incudostapedial defects with an intact mobile stapes. Verified PMID 15021766.

Cited in: Bone Cement Ossiculoplasty for Short Defects

Laser Doppler vibrometry on cadaveric temporal bones: malleus-to-stapes-head coupling transmitted vibration better than a drum-to-stapes-head assembly, and prosthesis tension had a very significant effect, dominant at low frequencies. Supports broad central coupling and a loosest-stable seat. Verified on PubMed.

Cited in: Mass, Stiffness, and Coupling in Reconstructed Chains, TORP Design and Biomechanics, Coupling and Stability at the Prosthesis Interfaces, Prosthesis Length, Angulation, and Tension, TORP onto the Stapes Footplate

Landmark comprehensive 3D finite-element model of the human ear built from histological sections, incorporating the external ear canal, tympanic membrane, ossicles, suspensory ligaments and tendons, the incudostapedial joint, cochlear load and the air-filled middle-ear cavity. Predicted tympanic-membrane and stapes-footplate displacement transfer functions across 200 Hz to 8 kHz were compared with published laser-Doppler and temporal-bone data, establishing FE modeling as a validated tool for studying middle-ear sound transmission and the effects of disease and reconstruction. Verified PMID 15255215, DOI 10.1023/B:ABME.0000030260.22737.53.

Cited in: Finite Element Modeling of the Reconstructed Ear

Comparative series showing that titanium prostheses outperformed non-titanium materials: successful rehabilitation of conductive loss (air-bone gap closed to within 20 dB) was achieved in 70% of partial (PORP) and 44% of total (TORP) reconstructions with titanium, versus 48% and 21% with non-titanium prostheses. Demonstrates the partial-versus-total outcome gap and titanium's advantage over earlier materials. Verified PMID 14709997.

Cited in: Titanium Ossicular Prostheses: Light, Stiff, and MRI-Safe

Self-closing titanium clip that grips the stapes head, the medial analogue of malleus-gripping designs; reliable seating across 133 operations with stable coupling, illustrating that a captured (clip/notch) interface resists slippage. Verified on PubMed.

Cited in: PORP Design and Biomechanics, Coupling and Stability at the Prosthesis Interfaces, Malleus-Coupling and Notched Prosthesis Designs

Series of 68 ossicular reconstructions (30 TORP, 38 PORP) with titanium prostheses, cartilage used universally at the drum interface, in a mostly revision population. The titanium prosthesis was easy to insert, well tolerated, and had a low extrusion rate; serviceable hearing was achieved in the majority. Establishes titanium's handling and low-extrusion profile that has made it a contemporary benchmark alloplast. Verified PMID 14709996.

Cited in: Grafts and Reconstruction Materials: Chapter Overview, Autograft Versus Alloplast: Choosing the Material, Prostheses Types, Biomechanics and Selection: Chapter Overview, Titanium Ossicular Prostheses: Light, Stiff, and MRI-Safe, PORP Design and Biomechanics, Coupling and Stability at the Prosthesis Interfaces, Choosing Autograft Versus Prosthesis by Defect Pattern

Fresh human temporal-bone study reconstructing an incus defect with PORPs of three lengths and measuring stapes velocity by laser Doppler vibrometry. Tension strongly affected transmission: tighter constructs lost low-frequency sound while looser ones risked instability, supporting the principle that the ideal prosthesis is the loosest construct that remains stable. Grounds the tension/coupling criterion. Verified PMID 14755209, DOI 10.1097/00005537-200402000-00024.

Cited in: Mass, Stiffness, and Coupling in Reconstructed Chains, Criteria for the Ideal Ossicular Prosthesis, Coupling and Stability at the Prosthesis Interfaces, Prosthesis Length, Angulation, and Tension, Prosthesis Displacement, Tilting, and Refixation

Bench study covering a PORP head with materials of differing rigidity and cartilage of differing size. Material rigidity had little effect; cartilage size mattered, with smaller cartilage covers transmitting best, but cartilage of clinically used size had little overall impact on vibration to the footplate.

Cited in: Prosthesis Length, Angulation, and Tension

Widely used practical review defining the type A (normal), type B (flat) and type C (negative pressure) tympanograms, the static admittance and ear-canal volume measures, and their everyday clinical interpretation. Verified PubMed.

Cited in: Tympanometry and Impedance Audiometry

KTP-laser plus drilling to liberate fixed malleus/incus and create a 1.5-2.0 mm clearance without prosthesis; n=20, mean ABG 33->13 dB, no refixation at 1-7 years.

Cited in: Managing Malleus Head Fixation and Epitympanic Disease

Longest reported follow-up of incus transposition (mean 9.2 years): 70% of ears maintained an air-bone gap of 20 dB or less averaged over 0.5-4 kHz; 54% had concurrent cholesteatoma surgery. Demonstrates the durability of the sculpted bony interposition over time.

Cited in: Incus Interposition Step by Step

Laser-Doppler mapping of round window membrane motion in human temporal bones; the membrane moves out of phase with stapes-driven inflow and shows a complex, non-uniform vibration pattern across frequency.

Cited in: The Round Window, Oval Window, and Cochlear Interface

268 reconstructions in which an anteriorly malpositioned malleus was mobilised and relocated to create a usable lateral anchor: 56% closed the air-bone gap to within 10 dB and 78% to within 20 dB, with no prosthetic extrusions, showing that recovering a malleus anchor is preferable to abandoning it.

Cited in: Remodeling and Repositioning Native Ossicular Remnants, Malleus-Absent Reconstruction Strategies

National survey of 325 UK ENT consultants: 72% reported neck and/or back pain, and over half attributed it directly to surgery, with the highest rates among otologists, linked to microscope work and prolonged sitting. Verified on PubMed (PMID 14738610).

Cited in: Patient Positioning, Draping, and Microscope Setup

Describes the uncommon situation of stapes footplate fixation combined with fixation, absence or malformation of the malleus-incus complex, requiring reconstruction of the entire ossicular conduction mechanism including footplate removal. Reports a staged strategy and prosthesis-from-footplate technique; air-bone gap closed to within 20 dB in a majority of the small cohort. Verified PMID 12671423.

Cited in: Combined Stapedotomy and Ossiculoplasty

Positive predictive value of an apparent superior canal dehiscence rose from 50% with 1.0 mm collimation to 93% with 0.5 mm collimation, demonstrating that partial-volume averaging on thick sections overcalls dehiscence. Verified against the PubMed record.

Cited in: Imaging Ossicular Erosion, Fixation, and Dehiscence

Long-term follow-up demonstrating that Ceravital prostheses undergo progressive absorption that becomes apparent on average around six years after implantation, much later than extrusion or slippage. The definitive demonstration that the material's hidden failure mode is slow dissolution, with the rate of absorption rising over time. Verified PMID 12544022.

Cited in: Lessons from Abandoned Materials: Plastipore and Ceravital

Stereological (Weibel) comparison of canal-skin revascularisation after the tympanomeatal flap versus the vascular strip incision; both restored vascular density comparable to non-operated controls, supporting either design when the pedicle is respected. Verified on PubMed.

Cited in: Raising the Tympanomeatal Flap Safely

Landmark retrospective series of more than 1,000 cartilage tympanoplasties using the perichondrium/cartilage island flap and palisade techniques, with roughly 96% closure and air-bone gaps settling to the 11-15 dB range. Demonstrates that the modest high-frequency cost predicted by vibrometry does not translate into a clinically meaningful conductive penalty. Verified PMID 14603038.

Cited in: The Endaural Approach: Incisions and Exposure, Raising the Tympanomeatal Flap Safely, Tympanic Membrane Elevation and Annulus Management, Tympanic Membrane Reconstruction and Prosthesis Coupling, Maintaining Middle Ear Aeration and Preventing Adhesions, Grafts and Reconstruction Materials: Chapter Overview, Cartilage Shield and Palisade Tympanoplasty, Cartilage Interposition at the Prosthesis-Drum Interface, Acoustic Effects of Cartilage Thickness and Geometry, Harvesting Cartilage, Fascia, and Bone Grafts

Series of titanium PORP/TORP reconstructions. Mean air-bone gap improved 20.9 dB and 56% closed to within 20 dB; overall extrusion was 4%, but no extrusions occurred when a cartilage graft was interposed between the titanium head and the tympanic membrane. Supports titanium as a light, rigid, low-extrusion material whose tolerance still depends on shielding the drum interface. Verified PMID 12621325.

Cited in: Material Science of the Middle Ear Environment

Review of middle-ear and stapes biomechanics, including ossicular resonance and how fixation alters the mechanical pathways that influence bone-conduction thresholds. Verified via PubMed.

Cited in: Carhart's Notch and Bone Conduction Artifacts

Clinical documentation of isolated round window atresia producing a predominantly conductive loss of 30-40 dB, with the niche easily overlooked at surgery; shows the round window is a true functional requirement for normal coupling.

Cited in: The Round Window, Oval Window, and Cochlear Interface

Surgically oriented synthesis of middle-ear mechanics; emphasises that an adequate aerated middle-ear space and a well-coupled graft are required to preserve the transformer, and that ossiculoplasty must re-establish effective area-ratio coupling onto the footplate. Verified via CrossRef.

Cited in: The Areal Ratio: Tympanic Membrane to Footplate Hydraulic Gain

Histological study of ossicles harvested from cholesteatomatous ears showing autografts can be reused after careful surface clearance, while underlining the residual-disease risk that constrains autograft use in cholesteatoma. Verified on PubMed.

Cited in: Grafts and Reconstruction Materials: Chapter Overview

Decision-analysis model concluding that intraoperative facial nerve monitoring is cost-effective across middle ear and mastoid surgery, adding roughly US$223-528 per case; supports routine use as an adjunct, not a substitute, for anatomical discipline. Verified on PubMed.

Cited in: Principles of Complication Avoidance in Ear Surgery

Proposes yet another ossicular/middle-ear classification, underscoring the proliferation of overlapping schemes that fragment outcome reporting. Identifiers not independently confirmed and therefore omitted.

Cited in: Limits of Classification: Toward International Outcome Comparison

Experimental model demonstrating that transmucosal CO2 diffusion into the cavity is a normal physiological buffer of middle-ear pressure rather than a pathological event. Verified on PubMed.

Cited in: Middle Ear Mucosa, Gas Exchange, and Mucosal Health

Clinical comparison of hydroxyapatite prostheses placed with and without an interposed autologous cartilage disc. Extrusion fell from 13.2% without cartilage to 1.9% with a cartilage cap, with no loss of hearing gain. Shows that even a bioactive interface benefits from a cartilage buffer at the drum in less favourable ears. Verified PMID 12105787.

Cited in: Cartilage Interposition at the Prosthesis-Drum Interface, Hydroxyapatite Prostheses and Osseointegration, Bioactive and Composite Prosthesis Coatings, Malleus-Absent Reconstruction Strategies, PORP onto a Mobile Stapes Superstructure, Prosthesis Extrusion: Mechanisms and Prevention, Prosthesis Displacement, Tilting, and Refixation, Delayed Complications and Late Failure

Three-dimensional finite-element model of the human middle ear including ligaments, tendons, the incudostapedial joint, cochlear loading, the external auditory meatus and the middle-ear cavities. Computed umbo and stapes displacement and middle-ear transfer function were compared with experimental human temporal-bone data; the study quantified the contribution of joints, ligaments and the air cavity to transmission. A foundational, independently developed FE model corroborating Gan and colleagues. Verified PMID 11931308, DOI 10.1121/1.1451073.

Cited in: Finite Element Modeling of the Reconstructed Ear

Clinical and temporal-bone histopathology series defining malleus fixation, with anterior mallear ligament calcification as a recurrent mechanism and characteristic audiometric / tympanometric (type As) profile.

Cited in: Managing Malleus Head Fixation and Epitympanic Disease

Experimental guinea-pig model interposing a cartilage disc between a synthetic middle-ear prosthesis and the tympanic membrane. Protrusion and extrusion of the implant were markedly reduced by the interposed cartilage, which kept the rigid prosthesis head separated from the epithelial surface of the drum. Provides the histopathologic mechanism behind clinical extrusion-prevention data. Verified PMID 11991590.

Cited in: Cartilage Interposition at the Prosthesis-Drum Interface

Demonstrates that techniques aimed at re-establishing communication between the mastoid air-cell reservoir and the middle ear improve postoperative aeration after intact canal wall surgery, supporting the principle that clearing and preserving the aditus-antrum is functionally important. Verified on PubMed.

Cited in: Mastoidectomy as a Platform for Reconstruction

Scanning laser-Doppler vibrometry (133 points) in an ear-canal/tympanic-membrane model comparing cartilage plates of 1.0, 0.7, 0.5 and 0.3 mm, palisades, and island grafts of varying size. Thinner plates, palisades and smaller islands preserve high-frequency transfer; thick continuous plates and large islands add mass and stiffness and damp high frequencies. Core acoustic dataset for thickness, slicing and area. Verified PMID 12368613.

Cited in: Tympanic Membrane Reconstruction and Prosthesis Coupling, Cartilage Shield and Palisade Tympanoplasty, Acoustic Effects of Cartilage Thickness and Geometry

Describes the computer-integrated pipeline from imaging and computer-aided geometry to a working finite-element model of the human middle ear, with particular attention to ossicular microanatomy and joint geometry. Model output (umbo and stapes-footplate motion) was compared with published human measurements. Establishes the workflow concept (image to geometry to mesh to harmonic acoustic-structural solution) on which prosthesis-design FE studies rest. Verified PMID 14595544, DOI 10.1007/s10237-002-0014-z.

Cited in: Finite Element Modeling of the Reconstructed Ear

Long-term (up to 9.5 years) hearing results in 203 consecutive patients with middle-ear tympanosclerosis, including first- and second-stage operations. Mean preoperative air-bone gap 30.9 dB improved to a short-term postoperative mean of 17.4 dB with closure to within 20 dB in 64.6%, and results were stable from short- to long-term follow-up with no dead ears. Used for the headline outcome and durability data. Verified PMID 11956534.

Cited in: Ossiculoplasty in Tympanosclerosis

Series of 60 consecutive remodelled malleus-allograft (homograft) malleus-to-footplate assemblies. Median gain rose from 18.3 dB at 2 months to 25 dB at 1 year, with air-bone gap closure within 20 dB in 81% of cases at 1 year and no extrusions. Demonstrates that, in expert hands with proper tissue banking, homograft ossicles can give competitive hearing results. Verified via PubMed/CrossRef.

Cited in: Homograft Ossicles and Tympano-Ossicular Allografts

Series of 68 ears with tympanosclerotic stapes fixation treated by small-fenestra stapedotomy, the majority requiring concurrent reconstruction of an eroded or fixed lateral chain. Air-bone gap closure to within 10 dB was achieved in roughly half and to within 20 dB in the majority, with no dead ears, showing that stapedotomy for fixed-footplate tympanosclerosis is safe and efficient when combined with ossiculoplasty. Verified PMID 12438848.

Cited in: Reconstruction on a Mobile Versus Fixed Footplate, Combined Stapedotomy and Ossiculoplasty, Ossiculoplasty in Tympanosclerosis

Retrospective analysis of the mechanism and risk factors for hydroxyapatite prosthesis extrusion. Early extrusion or graft failure occurred in 15 of 195 cases (8%) and late extrusion in 17 of 125 cases (14%). Late extrusion was strongly associated with postoperative atelectasis (p<0.0001), recurrent otitis media (p<0.0001) and myringitis (p=0.003), establishing that late extrusion is driven by drum retraction and an unhealthy middle ear rather than by the material itself. The authors recommend covering the prosthesis with cartilage. Verified PMID 12218614.

Cited in: Prosthesis Extrusion: Mechanisms and Prevention

Embryological development of the incudomalleolar and incudostapedial joints and the arch origins of the ossicles. Verified PubMed/CrossRef.

Cited in: Anatomy of the Ossicular Chain: Malleus, Incus, and Stapes

Demonstrates mobility and slippage at the incudomalleolar joint and its frequency-dependent effect on transmission. Verified PubMed/CrossRef.

Cited in: Anatomy of the Ossicular Chain: Malleus, Incus, and Stapes, Biomechanics of the Ossicular Chain in Motion

Simultaneous ear-canal-to-vestibule pressure gain and stapes velocity in 12 fresh human temporal bones (0.05-10 kHz); mean middle-ear gain peaks ~23.5 dB near 1.2 kHz with a band-pass shape, well below the static area ratio. Verified via PubMed.

Cited in: Impedance Matching and the Air-Fluid Mismatch, The Areal Ratio: Tympanic Membrane to Footplate Hydraulic Gain, The Ossicular Lever and Catenary Mechanisms, Sound Transmission from Drum to Cochlear Fluids

Refined and applied the Middle Ear Risk Index, adding smoking as a weighted variable and demonstrating that host and environmental factors compound the ossicular-status score when predicting tympanoplasty outcome.

Cited in: Acoustics, Mechanics and Classification Systems: Chapter Overview, The Austin-Kartush Classification of Ossicular Defects, Bellucci and SPITE: Grading Disease and Surgical Difficulty, The Middle Ear Risk Index (MERI) Explained, Comparing Risk Scores: MERI, OOPS, and the EER, Preoperative Evaluation and Patient Selection: Chapter Overview, Prognostic Factors Revisited: What Drives Outcome, Applying and Validating Prognostic Scoring Systems

Landmark prognostic analysis (the Dornhoffer-Gardner Ossiculoplasty Outcome Parameter Staging, MERI-related) showing that the dominant determinants of ossiculoplasty hearing outcome are the status of the residual ossicular chain (especially the stapes and malleus), middle-ear mucosa and aeration, not the prosthesis design alone. Provides the clinical reality check that a perfectly fitting printed prosthesis cannot overcome a hostile middle ear, and that coupling stability and length-tension still govern results. Verified PMID 11347630, DOI 10.1097/00129492-200105000-00005.

Cited in: The Malleus: Manubrium, Head, and Tympanic Membrane Coupling, The Incus: Long Process Vulnerability and the Lenticular Joint, The Eustachian Tube and Middle Ear Ventilation, Acoustics, Mechanics and Classification Systems: Chapter Overview, How Ossicular Defects Degrade Sound Transmission, Mass, Stiffness, and Coupling in Reconstructed Chains, Wullstein's Tympanoplasty Classification: Types I to V, The Austin-Kartush Classification of Ossicular Defects, Bellucci and SPITE: Grading Disease and Surgical Difficulty, The Middle Ear Risk Index (MERI) Explained, The Ossiculoplasty Outcome Parameter Staging (OOPS) Index, Comparing Risk Scores: MERI, OOPS, and the EER, Limits of Classification: Toward International Outcome Comparison, Preoperative Evaluation and Patient Selection: Chapter Overview, Otoendoscopy and Otomicroscopy of the Diseased Ear, Pure-Tone Audiometry and the Air-Bone Gap, Audiologic Patterns: Discontinuity Versus Fixation, High-Resolution CT of the Temporal Bone, Indications for Ossiculoplasty: When to Reconstruct, Absolute and Relative Contraindications, Primary Versus Staged Ossiculoplasty: Making the Call, Assessing Eustachian Tube Function Before Surgery, Prognostic Factors and Realistic Patient Counseling, Patient Selection in Pediatric and Bilateral Disease, Planning for Intraoperative Surprises and Prosthesis Readiness, The Surgical Philosophy of Ossicular Chain Reconstruction, Canal Wall Up Versus Canal Wall Down and Hearing, Mastoidectomy as a Platform for Reconstruction, Staging Strategy: The Healed Drum as a Prerequisite, Tympanic Membrane Reconstruction and Prosthesis Coupling, Maintaining Middle Ear Aeration and Preventing Adhesions, Sculpted Autograft Incus Interposition, Cortical Bone Autograft Columellae, Cartilage Interposition at the Prosthesis-Drum Interface, Bone Cement Ossiculoplasty for Short Defects, Autograft Versus Alloplast: Choosing the Material, Biocompatibility, Resorption, and Foreign Body Response, Remodeling and Repositioning Native Ossicular Remnants, Material Science of the Middle Ear Environment, Prostheses Types, Biomechanics and Selection: Chapter Overview, Criteria for the Ideal Ossicular Prosthesis, Hydroxyapatite Prostheses and Osseointegration, Titanium Ossicular Prostheses: Light, Stiff, and MRI-Safe, PORP Design and Biomechanics, TORP Design and Biomechanics, PORP Versus TORP: Matching Prosthesis to Residual Chain, Coupling and Stability at the Prosthesis Interfaces, Prosthesis Length, Angulation, and Tension, Malleus-Coupling and Notched Prosthesis Designs, Bioactive and Composite Prosthesis Coatings, An Evidence-Based Prosthesis Selection Algorithm, Reconstruction Techniques by Defect Pattern: Chapter Overview, Malleus-Present, Stapes-Present Reconstruction, Malleus-Absent Reconstruction Strategies, PORP onto a Mobile Stapes Superstructure, TORP onto the Stapes Footplate, Reconstruction on a Mobile Versus Fixed Footplate, Combined Stapedotomy and Ossiculoplasty, Ossiculoplasty in Tympanosclerosis, Reconstruction in the Cholesteatoma Ear, Revision Ossiculoplasty for Failed Reconstruction, Intraoperative Tricks for Prosthesis Stabilization, Choosing Autograft Versus Prosthesis by Defect Pattern, Outcomes, Prognosis and Complications: Chapter Overview, Prognostic Factors Revisited: What Drives Outcome, Impact of Malleus and Stapes Status on Results, Middle Ear Pathology, Atelectasis, and Outcome, Applying and Validating Prognostic Scoring Systems, Prosthesis Extrusion: Mechanisms and Prevention, Prosthesis Displacement, Tilting, and Refixation, Delayed Complications and Late Failure, Systematic Reviews and Meta-Analyses of Ossiculoplasty, 3D-Printed Patient-Specific Prostheses, From CT to Custom Implant: The Digital Pipeline, Bioactive and Antibacterial Prosthesis Coatings, Regenerative Medicine for Ossicular Tissue, Biomimetic Scaffolds for Ossicular Regeneration, Artificial Intelligence in Ossiculoplasty Planning, AI-Driven Outcome Prediction and Risk Modeling, Tissue-Engineered Tympanic Membranes, Future Perspectives and Unmet Needs in Hearing Restoration

Temporal-bone laser interferometry showing footplate displacement falls as mass is added at the incudostapedial joint, with disproportionate loss at high frequencies. Verified PubMed/CrossRef.

Cited in: Biomechanics of the Ossicular Chain in Motion, Mass, Stiffness, and Coupling in Reconstructed Chains

Series of 1210 ossicular reconstructions with Plastipore TORPs and PORPs reporting an overall known extrusion rate of about 4% once cartilage interposition was routine. Shows that the extrusion liability of porous polyethylene could be partly tamed by a cartilage cap even as the material's deeper biocompatibility problems remained. Verified PMID 11555743.

Cited in: Biocompatibility, Resorption, and Foreign Body Response, Lessons from Abandoned Materials: Plastipore and Ceravital, Fluoroplastic and Teflon Prosthesis Designs, Coupling and Stability at the Prosthesis Interfaces, Outcomes, Prognosis and Complications: Chapter Overview, Air-Bone Gap as the Core Outcome Measure, Prosthesis Extrusion: Mechanisms and Prevention

Athymic-rat model using Grafton human demineralised bone matrix (Putty and Flex). Implants induced abundant new bone (mean histologic score 3.7/4) with ABR thresholds in the normal range, but reconstruction implants collapsed into the bulla, showing that osteoinductive matrix alone lacks the immediate mechanical rigidity a load-bearing reconstruction needs. Illustrates both the promise and the structural limitation of regenerative grafts. Verified PMID 11698788.

Cited in: Regenerative Medicine for Ossicular Tissue

Shows that perforations degrade transmission chiefly by reducing the trans-tympanic pressure difference at low frequencies, illustrating how loss of the area transformer and two-window isolation impairs hearing. Verified PubMed.

Cited in: Impedance Matching and the Air-Fluid Mismatch

Prospective clinical trial of the open Tübingen titanium prosthesis (TTP), the design developed at Tübingen following Stupp's 1993 introduction of titanium into human ossiculoplasty. The open (fenestrated) head allowed the surgeon to see the shaft and stapes through the prosthesis, improving placement and coupling. Documents the favourable hearing results and handling of the open-head titanium design. Verified PMID 11568662, DOI 10.1097/00129492-200109000-00004.

Cited in: Titanium Ossicular Prostheses: Light, Stiff, and MRI-Safe

Series of ossiculoplasty performed in canal wall down cavities: about 64% of ears closed the air-bone gap to within 20 dB with a mean pure-tone gain near 12.3 dB, showing stable hearing gain is achievable in an open cavity, greatest in ears with the largest preoperative gaps. Verified on PubMed.

Cited in: Mastoidectomy as a Platform for Reconstruction

Foundational review of scaffold design criteria for bone and cartilage: a three-dimensional interconnected porous architecture, biocompatibility with controllable bioresorption to non-toxic byproducts, surface chemistry that supports cell attachment, and mechanical properties matching the implantation site. The canonical statement of the scaffold requirements applied here to the ossicular columella. Verified PMID 11071603, DOI via CrossRef.

Cited in: Biomimetic Scaffolds for Ossicular Regeneration

Long-term study of 106 ears followed more than five years. Hearing success was 59% at one year but deteriorated to 50% by five years, far better for short (P-type) columellas (60%) than long (T-type) columellas (34%). Prosthesis extrusion occurred in 17 ears (16%) at a mean of 27.7 months. Documents both the late hearing drift and the real extrusion risk of bare hydroxyapatite over time. Verified PMID 10971535.

Cited in: Material Science of the Middle Ear Environment, Hydroxyapatite Prostheses and Osseointegration

Retrospective series of 115 patients with middle-ear tympanosclerosis operated between 1987 and 1996 and classified by Wielinga and Kerr. Mean postoperative air-bone gap was about 18 dB in type II (attic malleus-incus fixation, mobile stapes), about 22 dB in type III (footplate fixation) and about 23 dB in type IV (combined fixation), showing that results worsen as fixation becomes more extensive and footplate-based. Verified PMID 10993449.

Cited in: Ossiculoplasty in Tympanosclerosis

Human cadaver measurements of stapes velocity and middle-ear pressures, grounding the role of the window pressure difference in cochlear drive.

Cited in: Sound Transmission from Drum to Cochlear Fluids

Temporal-bone vibrometry showing that a cartilage plate of about 0.5 mm gives the least acoustic transfer loss while still resisting deformation under middle-ear pressure swings; native tragal/conchal cartilage is 0.7-1.0 mm, supporting deliberate thinning of the interposition cap. Underpins the mass-versus-stability trade-off of the cartilage cap. Verified PMID 10821543.

Cited in: Tympanic Membrane Reconstruction and Prosthesis Coupling, Cartilage Shield and Palisade Tympanoplasty, Cartilage Interposition at the Prosthesis-Drum Interface, Acoustic Effects of Cartilage Thickness and Geometry

Temporal-bone study of 22 ears comparing anterior, central, and posterior footplate contact sites for a stapes-replacement prosthesis, informing where the medial end of a TORP should seat for efficient transmission.

Cited in: Prosthesis Length, Angulation, and Tension

Retrospective review of 775 patients with chronic suppurative otitis media examining the incidence, pathogenesis and hearing impact of tympanosclerosis and its relation to the degree and site of plaque. Used for the pathogenesis and epidemiology of post-inflammatory hyalinization and calcification. Verified PMID 10767919.

Cited in: Ossiculoplasty in Tympanosclerosis

Review of prion biology and iatrogenic Creutzfeldt-Jakob disease relevant to otolaryngology, including the resistance of prions to conventional sterilisation (autoclaving, formaldehyde, irradiation) and the rationale for caution with cadaveric tissue grafts in the era of variant CJD. Verified via PubMed.

Cited in: Homograft Ossicles and Tympano-Ossicular Allografts

Three-target footplate measurement in human temporal bones: vibration is predominantly piston-like below 2 kHz, with anterior-posterior rocking rising and becoming roughly equal to the piston near 4 kHz. Verified PubMed.

Cited in: Biomechanics of the Ossicular Chain in Motion

Biomechanical study of 90 incudes/mallei treated with formaldehyde-cialit, 1N NaOH, LpH or autoclaving (134°C). Cialit, NaOH and autoclaving each significantly reduced ultimate force and stiffness versus untreated controls, quantifying the trade-off between prion/viral inactivation rigour and mechanical/structural integrity of the graft. Verified via PubMed/CrossRef.

Cited in: Homograft Ossicles and Tympano-Ossicular Allografts

A Plastipore prosthesis that functioned for fourteen years before hearing deteriorated; revision showed disintegration of the porous polyethylene with multinucleated foreign-body giant cells and a footplate defect. Documents the late mechanical breakdown of porous polyethylene and the danger of fragments reaching the inner ear. Verified PMID 10384839.

Cited in: Lessons from Abandoned Materials: Plastipore and Ceravital

Foundational series of 165 transcanal endoscopic middle-ear procedures showing that the endoscope extends the operative field into structures hidden from the microscope (anterior perforation margin, posterior retraction pocket, facial recess, hypotympanum). Verified against PubMed record.

Cited in: Otoendoscopy and Otomicroscopy of the Diseased Ear, The Transcanal Approach to the Middle Ear, Endoscopic Ossiculoplasty: Technique and Evidence

123 ears with incudomallear ankylosis; 77% closed ABG to within 10 dB. Highlights coexisting stapes/otosclerotic fixation as a diagnostic trap requiring single-stage management.

Cited in: Managing Malleus Head Fixation and Epitympanic Disease

Design and outcomes of a hydroxyapatite PORP/TORP whose head carries a malleus notch and broadens posteriorly to seat under cartilage; excellent results (PTA-ABG <=10 dB) in 69% of PORP and 35% of TORP cases. Verified on PubMed (PMID 9546265).

Cited in: Planning for Intraoperative Surprises and Prosthesis Readiness, Malleus-Coupling and Notched Prosthesis Designs

Argues that audiometric outcome data are not normally distributed, so mean +/- standard deviation misleads; recommends median, quartiles and extremes displayed as box-and-whisker plots so that scatter and skew are visible rather than hidden. Verified via PubMed.

Cited in: Pitfalls in Reporting and Comparing Hearing Results

Authoritative review framing ossicular versus acoustic coupling; documents that real middle-ear pressure gain is frequency-dependent and smaller (~20 dB peak) than the idealised ~25-30 dB textbook transformer figure, with implications for ossiculoplasty. Verified via PubMed and Cambridge Core.

Cited in: Foundations and Anatomy of the Middle Ear: Chapter Overview, Anatomy of the Ossicular Chain: Malleus, Incus, and Stapes, Suspensory Ligaments and Synovial Joints of the Ossicles, Acoustics, Mechanics and Classification Systems: Chapter Overview, Impedance Matching and the Air-Fluid Mismatch, The Areal Ratio: Tympanic Membrane to Footplate Hydraulic Gain, The Ossicular Lever and Catenary Mechanisms, Biomechanics of the Ossicular Chain in Motion, Sound Transmission from Drum to Cochlear Fluids, How Ossicular Defects Degrade Sound Transmission, Wullstein's Tympanoplasty Classification: Types I to V, Pure-Tone Audiometry and the Air-Bone Gap, Audiologic Patterns: Discontinuity Versus Fixation, Tympanometry and Impedance Audiometry, Indications for Ossiculoplasty: When to Reconstruct, Canal Wall Up Versus Canal Wall Down and Hearing, PORP onto a Mobile Stapes Superstructure, Reconstruction in the Cholesteatoma Ear

Experimental implantation of titanium ossicular prostheses in the rabbit middle ear. No inflammatory cells were seen on the material surface, there was no excess fibrous tissue, the implants showed affinity to bone and were re-covered by regular mucosa, leading the author to conclude titanium is a favourable, biocompatible material for ossicular replacement. Grounds the biocompatibility/inertness criterion and titanium's excellent tolerance. Verified PMID 9801858, DOI 10.1007/s004050050086.

Cited in: Biocompatibility, Resorption, and Foreign Body Response, Criteria for the Ideal Ossicular Prosthesis

Retrospective series of 31 type IV tympanoplasties in ears with total ossicular loss unsuitable for ossicular reconstruction, documenting the cavum minor / sound-protection principle and its hearing results. Verified PubMed.

Cited in: Wullstein's Tympanoplasty Classification: Types I to V

CT of 75 normal middle ears on 1 mm sections. The lateral malleal ligament was seen in 95% of ears, anterior malleal 68%, superior malleal 46%, posterior incudal (lateral) 34% and (medial) 26%, and the stapedius tendon in only 27%. Non-visualisation of some normal structures is expected and does not imply pathology. Verified on PubMed (PMID 9090405).

Cited in: Suspensory Ligaments and Synovial Joints of the Ossicles, High-Resolution CT of the Temporal Bone

Authoritative analysis of middle ear acoustic mechanics: a sufficient middle ear air space and acoustic shielding of the round window are needed for normal sound transmission, so loss of middle ear volume and exposure of the round window degrade the result of any reconstruction. Verified on PubMed.

Cited in: Mastoidectomy as a Platform for Reconstruction

Temporal-bone analysis showing hearing after type IV/V tympanoplasty depends entirely on acoustic coupling and on shielding (round-window protection) that re-creates a pressure difference between the windows.

Cited in: The Round Window, Oval Window, and Cochlear Interface

Direct vestibule-versus-ear-canal pressure measurements give a middle-ear gain of about 20 dB between 0.5 and 2 kHz, falling above 4 kHz - the empirical basis for the frequency-dependent transformer. Verified PubMed/CrossRef.

Cited in: Impedance Matching and the Air-Fluid Mismatch, The Ossicular Lever and Catenary Mechanisms

Prospective comparison of 712 cases over nine years contrasting overlay and underlay fascia grafting. Both techniques gave reliable take and hearing; placement above or below the annulus was less important than careful technique, while overlay carried higher rates of lateralisation and blunting. Verified PMID 9395344 and DOI.

Cited in: Temporalis Fascia and Perichondrium Grafts

Seminal review establishing that middle-ear pressure is regulated both by intermittent tubal opening and by slow transmucosal gas exchange, with the mastoid acting as a gas buffer. Verified on PubMed.

Cited in: The Eustachian Tube and Middle Ear Ventilation

Postoperative nitrous-oxide tracer study showing that recovery of mastoid aeration depends on preserving at least part of the mastoid mucosa; complete mucosal stripping abolishes gas-exchange function. Verified on PubMed.

Cited in: Middle Ear Mucosa, Gas Exchange, and Mucosal Health

Standard otologic surgery text. The classic teaching that hearing results are comparable between canal-wall-up and canal-wall-down techniques when disease is fully cleared and the chain is appropriately reconstructed.

Cited in: Canal Wall Up Versus Canal Wall Down and Hearing

Electron-microscopic study of mucosa from 20 cholesteatoma ears showing loss of cilia, secretory transformation and impaired mucociliary clearance even where the mucosa looked normal under the microscope. Verified on PubMed.

Cited in: Middle Ear Mucosa, Gas Exchange, and Mucosal Health

Retrospective review of HRCT in 61 mastoidectomy ears: for the facial canal, CT sensitivity was 66% and specificity 84%; for semicircular-canal fistula, CT and surgery agreed in 59 of 61 (97%). Demonstrates that CT underdetects facial canal dehiscence. Verified on PubMed (PMID 8606226).

Cited in: High-Resolution CT of the Temporal Bone

Randomised comparison showing middle-ear pressure rises progressively to about 182 mmH2O over 60 min with 66% nitrous oxide but stays near baseline with total intravenous anaesthesia, with more postoperative nausea in the N2O group; grounds the recommendation to avoid or discontinue nitrous oxide before graft and prosthesis placement. Verified PubMed/CrossRef.

Cited in: Anaesthesia for Middle Ear Surgery: General and Local

Broad-band (20 Hz-11 kHz) stapes displacement and pressure measurements in 12 fresh human temporal bones; defines the stapes-cochlear input impedance that terminates the middle-ear transformer. Verified via PubMed.

Cited in: The Stapes and Oval Window: Superstructure, Crura, and Footplate, Canal Wall Up Versus Canal Wall Down and Hearing

Broad-band (20 Hz-11 kHz) measurement of stapes-cochlear input impedance in 12 fresh human temporal bones with the round window insulated; characterises the load the footplate drives, of which the round window is one compliant component.

Cited in: The Round Window, Oval Window, and Cochlear Interface

Original description of the Glasgow Benefit Inventory (GBI), an 18-item post-intervention generic patient-reported outcome measure scored from -100 (maximum harm) through 0 (no change) to +100 (maximum benefit), with general-health, social-support and physical-health subscales. Designed to be maximally sensitive to ENT interventions and to provide a common metric to compare benefit across operations including middle-ear surgery. Verified via PubMed.

Cited in: Patient-Reported Outcomes and Quality of Life

Experimental test in cat showing that cochlear response is driven by the differential window pressure; with the two window pressures equal and in phase the response collapses (~40 dB minimum). Foundational evidence for the two-window/phase-difference concept.

Cited in: The Round Window, Oval Window, and Cochlear Interface

Anatomic study defining the boundaries and aeration of Prussak's space, the cradle of pars flaccida cholesteatoma. Verified on CrossRef.

Cited in: The Tympanic Cavity: Walls, Recesses, and Surgical Landmarks

Survey of patients undergoing stapedotomy, myringoplasty, ossiculoplasty and mastoidectomy under local anaesthesia and of UK otolaryngologists; documents that local anaesthesia is well tolerated and advantageous yet used by only about 20% of surgeons. Supports LA for cooperative adults having straightforward middle-ear reconstruction. Verified PubMed/CrossRef.

Cited in: Anaesthesia for Middle Ear Surgery: General and Local

The AAO-HNS reporting standard: report the four-frequency pure-tone average using 0.5, 1, 2 and 3 kHz (substituting 3 kHz for the older 4 kHz), use the same bone-conduction reference before and after surgery to compute the air-bone gap, and report postoperative air-bone gap relative to the postoperative (not preoperative) bone line. Verified via PubMed.

Cited in: Pitfalls in Reporting and Comparing Hearing Results

AAO-HNS Foundation guideline standardising the reporting of conductive hearing loss treatment. Defines the four-frequency (0.5, 1, 2, 3 kHz) pure-tone-average air-bone gap as the primary outcome, computed against the postoperative bone line, and recommends reporting the mean postoperative gap plus the proportion of ears closed to within 10 and 20 dB. Verified via PubMed.

Cited in: Air-Bone Gap as the Core Outcome Measure

Laser-Doppler measurement of stapes-footplate displacement before and after removal of the tympano-ossicular system in six fresh human temporal bones; mean middle-ear pressure gain ~23 dB below 1 kHz, peaking near 0.9 kHz. Verified via PubMed.

Cited in: The Areal Ratio: Tympanic Membrane to Footplate Hydraulic Gain

AAO-HNS standard defining the four-frequency pure-tone average and air-bone gap (0.5, 1, 2, 3 kHz) for reporting conductive-hearing-loss surgery, the convention used to judge ossiculoplasty success. Verified PubMed/CrossRef.

Cited in: Pure-Tone Audiometry and the Air-Bone Gap, Outcomes, Prognosis and Complications: Chapter Overview, Belfast, Glasgow, and AAO-HNS Reporting Standards, Sensorineural Hearing Loss After Ossiculoplasty

Companion AAO-HNS statement introducing the revised reporting guidelines, emphasising standardised audiometric methods and presentation of individual rather than only mean results so that series can be compared. Verified via PubMed.

Cited in: Belfast, Glasgow, and AAO-HNS Reporting Standards

Review of the prostheses used in stapes surgery, including the wire-Teflon piston and the Teflon (Schuknecht) bucket-handle and Robinson designs. Notes that the several well-tolerated implant types give comparable results and that surgical outcome depends more on the surgeon's experience than on the material, framing the role fluoroplastic still holds in stapes work. Verified PMID 7596606.

Cited in: Fluoroplastic and Teflon Prosthesis Designs

Interferometric measurement of cat malleus motion showing the motion is not pure rotation about a fixed axis; a translational component appears and the axis shifts at mid and high frequencies. Verified PubMed/CrossRef.

Cited in: Biomechanics of the Ossicular Chain in Motion

Laser-Doppler temporal-bone study showing the ossicular lever and tympanic buckling contributions and demonstrating high-frequency lever slippage. Verified against PubMed PMID 8172293.

Cited in: The Ossicular Lever and Catenary Mechanisms

Review of 22 patients with iatrogenic facial nerve injury during otologic surgery: mastoidectomy was the commonest procedure (55%) but injury also occurred during tympanoplasty (14%); the tympanic (horizontal) segment near the cochleariform process and oval window was the most frequent site, and in 79% the injury was not recognised at operation. Grounds the discussion of intraoperative facial nerve injury, its sites and recognition. Verified PubMed/CrossRef.

Cited in: Immediate Postoperative Complications

Case report of fatal aluminium encephalopathy after an otoneurosurgical procedure in which an aluminium-containing ionomeric bone cement was placed against tissue in contact with cerebrospinal fluid. One of the sentinel reports that curtailed large-volume glass ionomer use in the temporal bone and underpins the rule that cement must not be placed where it can contact CSF or be applied in bulk. Verified PMID 7984030.

Cited in: Indications and Pitfalls of Glass Ionomer and HA Cement

Extended the Austin matrix with three additional categories, an intact chain (0), malleus-head fixation (E) and stapes fixation (F), and introduced the Middle Ear Risk Index (MERI), embedding ossicular status within a broader weighted-score risk framework. The capitulum-to-malleus strut is presented as the most stable construct.

Cited in: Anatomy of the Ossicular Chain: Malleus, Incus, and Stapes, The Malleus: Manubrium, Head, and Tympanic Membrane Coupling, Middle Ear Mucosa, Gas Exchange, and Mucosal Health, Acoustics, Mechanics and Classification Systems: Chapter Overview, Impedance Matching and the Air-Fluid Mismatch, Wullstein's Tympanoplasty Classification: Types I to V, The Austin-Kartush Classification of Ossicular Defects, Bellucci and SPITE: Grading Disease and Surgical Difficulty, The Middle Ear Risk Index (MERI) Explained, The Ossiculoplasty Outcome Parameter Staging (OOPS) Index, Comparing Risk Scores: MERI, OOPS, and the EER, Limits of Classification: Toward International Outcome Comparison, Preoperative Evaluation and Patient Selection: Chapter Overview, Indications for Ossiculoplasty: When to Reconstruct, Absolute and Relative Contraindications, Primary Versus Staged Ossiculoplasty: Making the Call, Prognostic Factors and Realistic Patient Counseling, Patient Selection in Pediatric and Bilateral Disease, Planning for Intraoperative Surprises and Prosthesis Readiness, The Surgical Philosophy of Ossicular Chain Reconstruction, Staging Strategy: The Healed Drum as a Prerequisite, Sculpted Autograft Incus Interposition, Remodeling and Repositioning Native Ossicular Remnants, PORP Versus TORP: Matching Prosthesis to Residual Chain, Prosthesis Length, Angulation, and Tension, Malleus-Coupling and Notched Prosthesis Designs, An Evidence-Based Prosthesis Selection Algorithm, Reconstruction Techniques by Defect Pattern: Chapter Overview, Malleus-Present, Stapes-Present Reconstruction, Incus Interposition Step by Step, Malleus-Absent Reconstruction Strategies, PORP onto a Mobile Stapes Superstructure, Reconstruction in the Cholesteatoma Ear, Revision Ossiculoplasty for Failed Reconstruction, Outcomes, Prognosis and Complications: Chapter Overview, Belfast, Glasgow, and AAO-HNS Reporting Standards, Prognostic Factors Revisited: What Drives Outcome, Impact of Malleus and Stapes Status on Results, Middle Ear Pathology, Atelectasis, and Outcome, Applying and Validating Prognostic Scoring Systems, Prosthesis Displacement, Tilting, and Refixation, Delayed Complications and Late Failure, AI-Driven Outcome Prediction and Risk Modeling

Companion review setting research priorities in ossicular reconstruction: material, design, placement and patient selection, and the difficulty of comparing outcomes across heterogeneous ears. Supports the unmet need for standardised outcome reporting and environment stratification. Verified on PubMed (PMID 7984379).

Cited in: Future Perspectives and Unmet Needs in Hearing Restoration

Histopathologic survey of 1000 temporal bones; persistent stapedial artery in 0.48%, illustrating failure of the normal second-arch stapedial-artery involution. Verified via PubMed (PMID 8127188).

Cited in: Embryology of the Ossicles: Branchial Arch Origins

Laser-Doppler temporal-bone study of incus-replacement prostheses, demonstrating that the area and site of head contact and the tension of the construct, more than mass, govern broadband transmission, with the loosest stable fit favoured.

Cited in: Mass, Stiffness, and Coupling in Reconstructed Chains

Seminal report of fatal aluminium encephalopathy after otoneurosurgical use of aluminium-containing (glass-ionomer) cement in contact with cerebrospinal fluid. This safety signal led to withdrawal of ionomeric cement from neuro-otological use and underpins the rule that glass-ionomer cement must never contact CSF or open dura. Verified PMID 7912334.

Cited in: Bone Cement Ossiculoplasty for Short Defects

Schuring's much-quoted observation that the future of ossiculoplasty will rest more on the solution of ancillary problems, eustachian-tube dysfunction, cholesteatoma control, mucosal regeneration and the fibrosis of healing, than on prosthesis technique. The framing thesis of this module on unmet needs. Verified on PubMed (PMID 7984373).

Cited in: Future Perspectives and Unmet Needs in Hearing Restoration

Classic technical description of sculpting and interposing the incus: drilling the long and short processes back to the body, fashioning an acetabulum (roughly 1 mm) on the body to seat the stapes head, and notching a facet to receive the malleus handle. Establishes the principle of carving the graft off the field with a diamond burr.

Cited in: Incus Interposition Step by Step

Scanning electron microscopy of vascular foramina showing the periosteal plexus contributes to the long and lenticular process supply, qualifying the classic 'avascular tip' dogma.

Cited in: The Incus: Long Process Vulnerability and the Lenticular Joint

Classic account of acoustic stapedius reflex thresholds and their clinical interpretation, including the diagnostic value of absent reflexes with normal bone conduction.

Cited in: Tensor Tympani and Stapedius: Protective Muscle Reflexes

The standard surgical classification of congenital minor middle-ear anomalies into four classes: (1) isolated stapes ankylosis, (2) stapes ankylosis with another ossicular anomaly, (3) ossicular anomaly with a mobile footplate, and (4) aplasia/severe dysplasia of the oval or round window. Class 4 carried by far the poorest hearing prognosis. Verified via CrossRef and PubMed.

Cited in: Embryology of the Ossicles: Branchial Arch Origins, Reconstructing Congenital Ossicular Anomalies

Widely cited review of tympanosclerosis underpinning the Wielinga-Kerr surgical classification: type I confined to the drum, type II attic fixation of the malleus-incus complex with a mobile stapes, type III stapes footplate fixation with a mobile (or absent) malleus-incus complex, and type IV combined fixation of footplate and malleus-incus complex. Used for the disease description and classification. Verified DOI 10.1111/j.1365-2273.1993.tb00590.x.

Cited in: Ossiculoplasty in Tympanosclerosis

Standard reference atlas for temporal bone and middle ear anatomy used to ground the architectural tour of the tympanic cavity.

Cited in: Foundations and Anatomy of the Middle Ear: Chapter Overview

Analysis of 535 ossiculoplasties identifying twelve preoperative features grouped as Surgical, Prosthetic, Infection, Tissue and Eustachian (SPITE) factors. Black emphasised the malleus as the single most important ossicle for prosthesis stability and long-term hearing gain.

Cited in: The Eustachian Tube and Middle Ear Ventilation, Acoustics, Mechanics and Classification Systems: Chapter Overview, The Austin-Kartush Classification of Ossicular Defects, Bellucci and SPITE: Grading Disease and Surgical Difficulty, The Middle Ear Risk Index (MERI) Explained, The Ossiculoplasty Outcome Parameter Staging (OOPS) Index, Comparing Risk Scores: MERI, OOPS, and the EER, Limits of Classification: Toward International Outcome Comparison, Preoperative Evaluation and Patient Selection: Chapter Overview, Absolute and Relative Contraindications, Assessing Eustachian Tube Function Before Surgery, Prognostic Factors and Realistic Patient Counseling, An Evidence-Based Prosthesis Selection Algorithm, Reconstruction Techniques by Defect Pattern: Chapter Overview, Malleus-Present, Stapes-Present Reconstruction, Outcomes, Prognosis and Complications: Chapter Overview, Prognostic Factors Revisited: What Drives Outcome, Impact of Malleus and Stapes Status on Results, Applying and Validating Prognostic Scoring Systems

Four-year experience with 215 hydroxyapatite middle-ear implants. Intraoperative difficulty shaping solid HA led to hybrid designs (HA head, Plasti-Pore shaft); the hybrid extrusion rate was low at 4.3%. Illustrates hydroxyapatite's excellent biocompatibility and tolerance against the drum alongside its practical limitation of brittleness and poor trimmability, motivating hybrid and later titanium designs. Verified PMID 1317029, DOI 10.1177/019459989210600312.

Cited in: Grafts and Reconstruction Materials: Chapter Overview, Autograft Versus Alloplast: Choosing the Material, Biocompatibility, Resorption, and Foreign Body Response, Material Science of the Middle Ear Environment, Prostheses Types, Biomechanics and Selection: Chapter Overview, Criteria for the Ideal Ossicular Prosthesis, Hydroxyapatite Prostheses and Osseointegration, PORP Design and Biomechanics, TORP Design and Biomechanics, Coupling and Stability at the Prosthesis Interfaces, Bioactive and Composite Prosthesis Coatings, Reconstruction Techniques by Defect Pattern: Chapter Overview, Intraoperative Tricks for Prosthesis Stabilization, Systematic Reviews and Meta-Analyses of Ossiculoplasty

Temporal-bone histology of six ears with permanent Silastic in situ 1.2-21.2 years showed no foreign-body reaction, rejection or chronic inflammation; the cavity was lined by normal continuous mucosa and most bones lacked significant submucosal fibrosis. Verified on PubMed.

Cited in: Maintaining Middle Ear Aeration and Preventing Adhesions

Unified middle-ear model defining ossicular coupling (drum to footplate via the chain) versus acoustic coupling (direct window-pressure difference). Establishes that interrupting the ossicular route can leave only the much weaker acoustic route, the basis of the maximal conductive loss in discontinuity.

Cited in: The Round Window, Oval Window, and Cochlear Interface, Sound Transmission from Drum to Cochlear Fluids, How Ossicular Defects Degrade Sound Transmission, Pure-Tone Audiometry and the Air-Bone Gap

Long-term tympanoplasty series documenting that postoperative bone-conduction deterioration is uncommon and that a permanent dead ear is a rare but recognised outcome. Verified via PubMed.

Cited in: Sensorineural Hearing Loss After Ossiculoplasty

Introduces a binaural plot of pre- and postoperative air-conduction thresholds in both ears, showing that monaural air-bone gap closure can overstate the benefit a patient actually perceives, because disability is governed by the better-hearing ear. Verified via PubMed.

Cited in: Belfast, Glasgow, and AAO-HNS Reporting Standards, Pitfalls in Reporting and Comparing Hearing Results

Interferometric measurement of manubrial vibration showing the malleus rotation axis is not fixed but shifts with frequency, complicating the simple hinged-lever model. Citation verified on PubMed (PMID 1938631).

Cited in: The Malleus: Manubrium, Head, and Tympanic Membrane Coupling, The Ossicular Lever and Catenary Mechanisms

Argues that air-bone gap closure, while a reliable indicator of technical success and useful for comparing materials and techniques, assesses the operated ear in isolation and does not capture binaural benefit; advocates a more patient-oriented standard (the operated ear reaching a usable level relative to the contralateral ear) as a complement to gap reporting. Verified via PubMed.

Cited in: Air-Bone Gap as the Core Outcome Measure

Randomized prospective comparison of Ceravital glass-ceramic and Plastipore porous-polyethylene prostheses. The two materials had similar extrusion rates, and two of 38 Ceravital patients developed late hearing failure attributable to resorption of the prosthesis material, an early controlled signal of Ceravital's distinctive absorption problem. Verified PMID 2301864.

Cited in: Lessons from Abandoned Materials: Plastipore and Ceravital

Early Cremers-group analysis of congenital middle-ear anomalies with a mobile stapes, describing malleus-handle fixation, incus long-process defects and incudostapedial disconnection and the corresponding interposition or columella reconstructions. Background source for the reconstructive options used in class 2 and class 3 anomalies.

Cited in: Reconstructing Congenital Ossicular Anomalies

Histologic study of 15 hydroxyapatite middle-ear prostheses retrieved from patients (4% of 375 implanted). Integration, epithelial coverage and biodegradation broadly matched animal experiments, but reactions during chronic human infection were more severe than in induced acute infection in rats, documenting that osseointegration is real but conditional on a healthy, non-infected middle-ear environment. Verified PMID 2154157.

Cited in: Hydroxyapatite Prostheses and Osseointegration

Bellucci's later elaboration of case selection and the infection-stability grading for tympanoplasty and ossicular reconstruction. Verified PubMed (note: this is the 1989 OtolClinNA paper, distinct from the 1973 Laryngoscope original).

Cited in: Bellucci and SPITE: Grading Disease and Surgical Difficulty

Interferometric vibration mapping of the tympanic membrane underpinning the modern view of conical buckling and the catenary lever. DOI and PMID verified.

Cited in: The Ossicular Lever and Catenary Mechanisms

Extended high-frequency audiometry after tympanoplasty showed measurable loss in 37.5% of ears, judged important in 16.7%, attributed to drill-generated acoustic trauma. Verified via PubMed.

Cited in: Sensorineural Hearing Loss After Ossiculoplasty

Quantifies the 512 Hz Rinne test against the audiometric air-bone gap: a negative Rinne becomes reliable only once the gap exceeds about 20 dB, and sensitivity climbs steeply for gaps of 30 dB or more. Explains why a large gap from discontinuity or fixation gives a confidently negative Rinne while a small gap may be missed at the bedside.

Cited in: Audiologic Patterns: Discontinuity Versus Fixation

Landmark safety appraisal that crystallised the disease-transmission concern. Notes that ethanol and formaldehyde inactivate HIV in vitro but that complete permeation of dense ossicular homograft material with preservative is unproven, and that no routine preservation method reliably inactivates the agent of Creutzfeldt-Jakob disease. Recommended donor HIV screening. This paper is widely credited with hastening the decline of ossicle banking. Verified via PubMed/JAMA Network.

Cited in: Homograft Ossicles and Tympano-Ossicular Allografts

Landmark analysis of ossicular joint mechanics and lever behaviour relevant to how reconstruction preserves or loses the lever. DOI and PMID verified.