Ossicular fixation disturbs the mobility of the ossicular chain and causes conductive hearing loss. To diagnose the lesion area, otologists typically assess ossicular mobility through intraoperative palpation. Quantification of ossicular mobility and evidence-based diagnostic criteria are necessary for accurate assessment of each pathology, because diagnosis via palpation can rely on the surgeons\' experiences and skills. In this study, ossicular mobilities were simulated in 92 pathological cases of ossicular fixation as compliances using a finite-element (FE) model of the human middle ear. The validity of the ossicular mobilities obtained from the FE model was verified by comparison with measurements of ossicular mobilities in cadavers using our newly developed intraoperative ossicular mobility measurement system. The fixation-induced changes in hearing were validated by comparison with changes in the stapedial velocities obtained from the FE model with measurements reported in patients and in temporal bones. The 92 cases were classified into four groups by conducting a cluster analysis based on the simulated ossicular compliances. Most importantly, the cases of combined fixation of the malleus and/or the incus with otosclerosis were classified into two different surgical procedure groups by degree of fixation, i.e., malleo-stapedotomy and stapedotomy. These results suggest that pathological characteristics can be detected using quantitatively measured ossicular compliances followed by cluster analysis, and therefore, an effective diagnosis of ossicular fixation is achievable.

An isolated fracture of the handle of the malleus is a rare entity in otorhinolaryngology and manifests clinically as acute-onset unilateral hearing loss. Several factors may cause this injury, including acute barotraumatic pressure changes or traumatic events. Various therapeutic approaches such as tympanoplasty, autologous graft, or application of bone cement are discussed. We report the case of a 46-year-old female patient who developed acute hearing loss in her left ear after finger manipulation. Clinical evaluation revealed axial displacement of the handle of the malleus and audiometry indicated conductive hearing loss. After otoscopy, audiometry, and computed tomography, tympanoscopy was indicated due to suspicion of ossicular chain disruption. Intraoperatively, an isolated fracture of the handle of malleus was found, which was treated with glass ionomer cement. Following postoperative examination, there was progressive improvement in the acoustic transmission component, such that a normal hearing threshold was observed 4 months postoperatively. This case report underlines the importance of precise diagnosis and individualized treatment for rare middle ear injuries.
UNASSIGNED: Die isolierte Hammergrifffraktur ist eine seltene, aber klinisch relevante Verletzung im Mittelohr, die zu einer einseitigen Hörminderung führt. Ursachen können akute Druckveränderungen oder traumatische Ereignisse sein. Verschiedene Therapieansätze wie Tympanoplastik, Transposition von autologem Material oder Applikation von Knochenzement werden diskutiert. In dieser Kasuistik wird eine 46-jährige Patientin mit einseitiger Hörminderung nach Manipulation im Ohr beschrieben. Klinisch zeigen sich eine Achsenfehlstellung des Hammergriffs und eine Schallleitungshörminderung in der Audiometrie. Die Verdachtsdiagnose lautet Unterbrechung der Gehörknöchelchenkette. Im Rahmen einer Tympanoskopie wird die Diagnose isolierte Hammergrifffraktur gestellt. Es wird in weiterer Folge Glasionomerzement zur Rekonstruktion des Hammergriffs verwendet. Postoperativ verbessert sich die Hörfunktion signifikant, mit einer vollständigen Remission der Hörminderung nach vier Monaten. Diese Kasuistik zeigt die Bedeutung einer umfassenden Diagnostik und Erfahrung des Operateurs bei der Auswahl der Therapie.

Conductive hearing loss with a normal tympanic membrane is a common reason for otolaryngology consultation, with otospongiosis being the most frequent cause and House syndrome being extremely rare, requiring systematic investigation. We report the case of a 31-year-old woman who presented with conductive hearing loss with a normal tympanic membrane. A temporal bone computed tomography (CT) scan confirmed a House-Goodhill syndrome due to fixation of the malleus head. Surgical intervention was considered to remove the attic bone synostosis with the malleus head, resulting in a significant clinical improvement. The Goodhill syndrome is a rare condition that causes hearing loss with a normal eardrum. The surgery can highly improve the hearing function.

To study the morphology and anthropometry of human ear ossicles from cadaveric temporal bone and to study the variations of the human ossicles from ossiculoplasty point of view. 38 sets of ear ossicles were collected, each containing malleus, incus and stapes, from temporal bone dissection done in Vasantrao Pawar medical college, Nashik. They were studied under microscope & anthropometrical, morphological evaluation done. Malleus showed variations in handle where 61% were straight and 39% curved. Weight of malleus ranged from 0.03-0.06 gm. The length ranged from 5.5 to 8.2 mm. Incus showed morphological variation in lenticular process which was present in 73% incii. Weight of incus ranged from 0.04 to 0.09 gm, average length of long process 3.5 mm, width of body 4 mm. In stapes variations was seen with head of stapes which was absent in 21% bones. With increasing awareness about postop hearing status, this study will add up in knowledge of morphological and anthropometric variations that exists in Indian population, help otologists to understand middle ear dynamics better which will improve results of ossiculoplasty.

Objective:For tympanosclerosis patients with ossicular chain fixation, we use ossicular chain bypass technique and evaluate its long-term effects. Methods:From June 2017 to June 2019, 147 patients with tympanosclerosis who underwent middle ear surgery with otoscopy in Yinchuan First People\'s Hospital were reviewed. The subjects were divided into three groups according to the implemented operation plan, 51 cases in the ossicular chain mobilization group（OCM）, 56 cases in the ossicular chain bypass reconstruction group（OCB）, and 40 cases in the malleus-incus complex resection reconstruction group（MICR）. Through a three-year follow-up, the medium and long-term effects of different operation plans were compared and analyzed. Results:There was no significant difference among the three groups in the incidence of tympanic membrane perforation, delayed facial nerve palsy, and the dispatch and displacement of PORP. The incidence of tympanic membrane retraction pocket or cholesteatoma after operation in OCB group（0） was significantly lower than that in OCM group（11.76%） and MICR group（7.5%）（P<0.05）. At 12 months after operation, ΔABG of OCB group and MICR group were better than that in the OCM group（P<0.05）. At 36 months after operation, ΔABG of OCB group was better than that in the OCM group（P<0.05）, and there was no significant difference between OCB group and MICR group. The audiological performance of patients with epitympanic sclerosis（ETS） at 12, 24 and 36 months after operation was better than that of patients with posterior tympanosclerosis（PTS） and total tympanosclerosis（TTS）（P<0.05）. Conclusion:Compared with patients undergoing ossicular chain mobilization and malleus-incus complex resection for ossicular chain reconstruction, patients with tympanosclerosis undergoing bypass technique have better and stable hearing prognosis in medium and long term. This technique can effectively prevent the formation of retracted pocket and cholesteatoma in patients with tympanosclerosis after operation.
目的：应用听骨链短路技术治疗伴有听骨链固定的鼓室硬化患者，评价分析手术中远期疗效。 方法：回顾2017年6月至2019年6月于银川市第一人民医院接受耳内镜中耳手术的鼓室硬化患者147例，根据所实施的手术方案将研究对象分为3组，即听骨链松解术（OCM）组51例，听骨链短路技术（OCB）组56例，锤砧复合体切除听骨链重建术（MICR）组40例，通过为期3年的术后随访，对比分析不同手术方案的中远期疗效。 结果：3组在术后鼓膜再穿孔、迟发性面神经麻痹、人工听骨排出及移位发生率比较差异无统计学意义。术后鼓膜内陷袋形成或胆脂瘤的发生率比较，OCB组（0）显著优于OCM组（11.76%）和MICR组（7.5%）（P<0.05）。使用ΔABG来评价术后气骨导差的改善程度，术后12个月OCB组及MICR组均优于OCM组（P<0.05）。术后36个月OCB组ΔABG高于OCM组（P<0.05），OCB组与MICR组在术后36个月ΔABG比较，差异无统计学意义。上鼓室型鼓室硬化（ETS）患者术后12、24及36个月听力学表现优于后鼓室型（PTS）及全鼓室型鼓室硬化（TTS）（P<0.05）。 结论：接受短路技术听骨链重建手术的鼓室硬化患者，相较于接受听骨链松解术以及锤砧复合体切除听骨链重建手术的患者，其听力预后在中远期表现更加优秀且稳定。该技术可以有效预防鼓室硬化患者术后鼓膜内陷袋形成及胆脂瘤的发生。.

OBJECTIVE: A special presentation of foreign body granuloma originating from the lateral process of the malleus (FBGLP) was noted in the absence of a history of foreign body entry into the external auditory canal (EAC). This study reported the clinical features, pathology, and prognosis of patients with FBGLP.
METHODS: Retrospective study.
METHODS: Shandong Provincial ENT Hospital.
METHODS: Nineteen pediatric patients (age, 1-10 yr) with FBGLP.
METHODS: Clinical data were collected from January 2018 to January 2022.
METHODS: Clinicopathologic characteristics of the patients were analyzed.
RESULTS: All patients had an acute course, and were within 3 months of ineffective medical treatment. The most common symptoms were suppurative (57.9%) and hemorrhagic (42.1%) otorrhea. FBGLP imaging examinations demonstrated a soft mass blocking the EAC without bone destruction and occasionally concomitant effusion in the middle ear. The most common pathologic findings were foreign body granuloma (94.7%,18/19), granulation tissue (73.7%, 14/19), keratotic precipitate (73.7%, 14/19), calcium deposition (63.2%, 12/19), hair shafts (47.4%, 9/19), cholesterol crystals (5, 26.3%), and hemosiderin (15.8%, 3/19). Foreign body granuloma and granulation tissue showed higher expression levels of CD68 and cleaved caspase-3 than did the normal tympanic mucosa, whereas Ki-67 levels were similarly low in all tissues. The patients were followed up for 3 months to 4 years without recurrence.
CONCLUSIONS: FBGLP is caused by endogenous foreign particles in the ear. We recommend the trans-external auditory meatus approach for FBGLP surgical excision, as this shows promising outcomes.

OBJECTIVE: The objectives of the present clinical trial are to describe our surgical technique for advanced tympanosclerosis (TS) and to present the comparison of pre-and postoperative audiometric results.
METHODS: 21 patients suffering from advanced TS (Only type III and IV patients according to Wielinga-Kerr classification) were enrolled in this prospective study. A pure transcanal endoscopic approach was preferred for all patients included in the study. Titanium malleus replacement prosthesis (MRP) and polytetrafluoroethylene (PTFE) loop prosthesis combination were used to bypass fixed ossicles to achieve sound transmission to the inner ear. Pre-and postoperative pure tone audiometry (PTA) measurements and air-bone gap (ABG) results compared, and surgical technique was considered successful if postoperative ABG was less than 20 dB.
RESULTS: Six of the 21 patients had been operated on before and the tympanic membrane (TM) was intact. The remaining 15 of the 21 patients were the primary cases, and TM perforation repair and ossiculoplasty using combination of the MRP and PTFE loop prosthesis were performed at single-staged operation. The average preoperative ABG values significantly improved from 37.1 ± 6.2 to 14.5 ± 1.2 dB postoperatively (p < 0.001). The mean preoperative air conduction threshold (ACT) significantly decreased from 51.7 ± 11.4 to 28.5 ± 9.1 dB (p < 0.001).
CONCLUSIONS: TS surgery is still a controversial issue particularly in stapes footplate fixation. However, our surgical and audiological results in this study are quite promising. The combination of titanium MRP and PTFE loop prosthesis for restoring sound transmission in advanced TS cases is reliable, effective and novel treatment option via endoscopic transcanal approach.

Automated image registration techniques can successfully determine anatomical variation in human temporal bones with statistical shape modeling.
There is a lack of knowledge about inter-patient anatomical variation in the temporal bone. Statistical shape models (SSMs) provide a powerful method for quantifying variation of anatomical structures in medical images but are time-intensive to manually develop. This study presents SSMs of temporal bone anatomy using automated image-registration techniques.
Fifty-three cone-beam temporal bone CTs were included for SSM generation. The malleus, incus, stapes, bony labyrinth, and facial nerve were automatically segmented using 3D Slicer and a template-based segmentation propagation technique. Segmentations were then used to construct SSMs using MATLAB. The first three principal components of each SSM were analyzed to describe shape variation.
Principal component analysis of middle and inner ear structures revealed novel modes of anatomical variation. The first three principal components for the malleus represented variability in manubrium length (mean: 4.47 mm; ±2-SDs: 4.03-5.03 mm) and rotation about its long axis (±2-SDs: -1.6° to 1.8° posteriorly). The facial nerve exhibits variability in first and second genu angles. The bony labyrinth varies in the angle between the posterior and superior canals (mean: 88.9°; ±2-SDs: 83.7°-95.7°) and cochlear orientation (±2-SDs: -4.0° to 3.0° anterolaterally).
SSMs of temporal bone anatomy can inform surgeons on clinically relevant inter-patient variability. Anatomical variation elucidated by these models can provide novel insight into function and pathophysiology. These models also allow further investigation of anatomical variation based on age, BMI, sex, and geographical location.

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This review article attempts to analyze the various research studies conducted in developing the models to evaluate the anatomy of the middle ear, its biomechanics, and the applications of these models in normal and diseased states. Various studies conducted over the past 50-60 years have been critically analyzed. We also discuss the various advantages and disadvantages of different methods of measurement of middle ear parameters. Beginning from anatomical modelling to histopathological sections and the latest three-dimensional (3D) reconstruction with finite element modelling, various methods of middle ear measurements have been critically analyzed. At the end of this review, we have concluded that the best and most effective method of middle ear modelling is the 3D reconstruction using high-resolution computed tomography and finite element modelling.