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tympanic bone

Shin-Ichi Kanemaru, Rie Kanai, Misaki Yoshida, Yuji Kitada, Kaoru Omae, Shigeru Hirano
OBJECTIVE: To apply regenerative treatment for tympanic membrane (TM) perforation to patients with severe calcification of the TM, cholesteatomas, or tumors localized to the tympanic cavity. STUDY DESIGN: Controlled clinical pilot study. SETTING: General hospitals. PATIENTS: Forty-five patients (age: 8-85; M = 19, F = 26) were selected from patients with or without TM perforation for the regenerative treatment...
April 2018: Otology & Neurotology
Es-Hak Bedri, Miriam Redleaf
OBJECTIVES: In Ethiopia, 2-stage operations with middle ear prostheses are economically unfavorable. We hypothesized that single-stage autologous ossiculoplasty results in acceptable tympanic membrane (TM) and hearing improvements in a setting of limited resources. METHODS: One hundred eighty-eight patients (197 ears) who underwent 1-stage autologous ossiculoplasty for ossicular dysfunction are presented. All but 14 of these ears also had perforations of the TM...
March 1, 2018: Annals of Otology, Rhinology, and Laryngology
Takahiro Azuma, Taketoshi Nogaki, Patricia Schachern, Michael M Paparella, Sebahattin Cureoglu
HYPOTHESIS: We hypothesized that there would be significant anatomic differences of the tensor tympani muscle (TTM), tympanic diaphragm, epitympanum, and protympanum in patients with versus without Menière's disease. BACKGROUND: The effects of tenotomy on Menière's disease suggested it relieves the pressure on the inner ear of the contraction of the TTM and of negative middle ear pressure. METHODS: Using human temporal bones from patients with Menière's disease, two studies were conducted...
March 1, 2018: Otology & Neurotology
Jieun Kang, Se-Joon Oh, Hyun-Min Lee, Ki-Jae Jeong, Nari Shin, Il-Woo Lee, Jaebeom Lee
Many artificial materials have been used for mastoid cavity obliteration in canal wall down tympanomastoidectomy. Among the artificial materials, hydroxyapatite is most popular material for mastoid cavity obliteration. Hydroxyapatite is biostable and osteoconductive, but it has poor mechanical properties, especially brittleness. To overcome the limitation, hydroxyapatite has been combined with natural chitosan polymer, which is biocompatible and flexible, to produce a hydroxyapatite-chitosan patch via a sublimation-assisted compression process...
December 1, 2017: Journal of Biomedical Nanotechnology
Hantai Kim, Ho Young Bae, Oak-Sung Choo, Yun-Hoon Choung
OBJECTIVES: Combined mastoidectomy is generally preferred to tympanoplasty alone when treating patients with chronic otitis media (COM), particularly when temporal bone computed tomography (TBCT) shows that the mastoid cavity contains opacification of soft tissue density. However, in cases with Eustachian tube dysfunction, a mastoid cavity volume may be a burden to its function. We hypothesized that tympanoplasty alone might be better than tympanoplasty combined with mastoidectomy because soft tissue in the mastoid cavity is a sequel to a protective physiological response...
March 2018: Clinical and Experimental Otorhinolaryngology
Olumayowa O Igado
Understanding skull anatomy and morphometry is crucial to the diagnosis and treatment of some osteology disorders. This study investigated the morphometry and skull typology of the skull of the Nigerian local dog as a skull prototype for the dolichocephalic breed of dogs. A total of sixteen adult dogs (7 males, 9 females), of about 2 years were used. A total of 20 parameters were measured on each skull, and two indices (cephalic and orbital) calculated. The males had higher values for nine parameters (two of which were calculated indices), including the maximum width of the skull, length of the mandibular symphysis, height of the tympanic bulla and height of the external auditory opening, although no statistically significant difference was observed (p > 0...
December 30, 2017: Nigerian Journal of Physiological Sciences: Official Publication of the Physiological Society of Nigeria
Z Peng, Z X Wang, J Xie, L E Wang, Y Liu, S S Gong
Objective: To summarize the clinical characteristics and therapeutic experiences of the middle ear teratoma in infants. Methods: Three cases of middle ear teratoma, from 2012-2015 in Beijing Friendship Hospital were analyzed. Results: The three cases all developed slowly and presented unilateral otorrhea and hearing loss. Otoscopy showed the granulation tissue in the external ear canal. Audiological changes varied according to the degree of severity. Imaging features showed the pocket-like occupancy lesions in the Eustachian tube area...
February 7, 2018: Zhonghua Er Bi Yan Hou Tou Jing Wai Ke za Zhi, Chinese Journal of Otorhinolaryngology Head and Neck Surgery
Es-Hak Bedri, Asnake Bitew, Miriam Redleaf
BACKGROUND: The English language literature finds no clear protocols for otologic surgery for HIV+ patients. OBJECTIVE: To demonstrate that simple tympanoplasty and type III tympanoplasty in HIV+ patients with CD4 >400 cells/cc results in tympanic membrane closures and hearing improvements equivalent to the same procedures in controls. MATERIALS AND METHODS: This retrospective review documents the otologic conditions and operative results of 32 HIV+ patients and 32 controls...
February 1, 2018: Annals of Otology, Rhinology, and Laryngology
Molly C Womack, Tyler S Fiero, Kim L Hoke
The repeated, independent evolution of traits (convergent evolution) is often attributed to shared environmental selection pressures. However, developmental dependencies among traits can limit the phenotypic variation available to selection and bias evolutionary outcomes. Here we determine how changes in developmentally correlated traits may impact convergent loss of the tympanic middle ear, a highly labile trait within toads that currently lack adaptive explanation. The middle ear's lability could reflect evolutionary trade-offs with other skull features under selection, or the middle ear may evolve independently of the rest of the skull, allowing it to be modified by active or passive processes without pleiotropic trade-offs with other skull features...
January 31, 2018: Evolution; International Journal of Organic Evolution
Anders Niklasson, Kilian Gladiné, Anton Rönnblom, Magnus von Unge, Joris Dirckx, Krister Tano
OBJECTIVE: To compare stapes vibrations in different partial ossicular replacement prosthesis (PORP) applications. METHODS: Stapedial vibrations were measured on fresh frozen human temporal bones with laser Doppler vibrometry. Eight different types of common ossiculoplasty methods were compared regarding recovery of stapes vibrations in relation with the normal ossicular chain. The PORPs were divided into three groups: 1) PORPs with the lateral contact only with the tympanic membrane, 2) PORPs with lateral contact only to the malleus handle, and 3) PORPs with lateral contact with both the malleus handle and the tympanic membrane...
March 2018: Otology & Neurotology
Jia Min, Se-Hyung Kim
OBJECTIVES: This study aimed to compare the outcome of endoscopic tympanoplasty with sterile acellular dermal allograft (ADA) and conventional endaural microscopic tympanoplasty with tragal perichondrium. METHODS: This was a retrospective comparative study of 53 patients (25 males and 28 females) with tympanic membrane perforation who underwent type I tympanoplasty in the department of otorhinolaryngology at a tertiary medical center from March 2011 to April 2017...
December 7, 2017: American Journal of Otolaryngology
M C Satmis, M van der Torn
OBJECTIVES: The aim of this study is to assess the subjective and objective short-term results and safety of transnasal balloon dilatation of the Eustachian tube (BET) in adult patients with chronic dilatory Eustachian tube dysfunction (ETD). DESIGN: Retrospective cohort study. Data collection was performed preoperatively, 1 and 3 months after BET. SETTING: Tertiary referral hospital. PARTICIPANTS: A cohort of 42 consecutive patients (66 ears)...
February 2018: European Archives of Oto-rhino-laryngology
Yuefeng Chen, Kai Zhang, Yanfeng Xu, Yanxu Che, Linna Guan, Yefeng Li
OBJECTIVE: This study aimed to investigate the reliability of temporal bone high-resolution CT (HRCT) in patients with traumatic facial paralysis. METHODS: HRCT with cross-sectional scanning and multi-planar reformation (MPR) was performed on 26 cases with traumatic facial paralysis, and the preoperative imaging manifestations were compared with surgical findings. RESULTS: Preoperative HRCT revealed fallopian canal damage at the posterior genu in 1 case, geniculate ganglion in 22 cases, labyrinthine segment in 4 cases, tympanic segment in 13 cases and mastoid segment in 0 case, while surgical findings confirmed fallopian canal damage at the posterior genu in 7 cases, geniculate ganglion in 23 cases, labyrinthine segment in 4 cases, tympanic segment in 17 cases and mastoid segment in 7 cases...
December 5, 2017: American Journal of Otolaryngology
Erik Trinkaus, Xiu-Jie Wu
In the context of Middle and Late Pleistocene eastern Eurasian human crania, the external auditory exostoses (EAE) of the late archaic Xuchang 1 and 2 and the Xujiayao 15 early Late Pleistocene human temporal bones are described. Xujiayao 15 has small EAE (Grade 1), Xuchang 1 presents bilateral medium EAE (Grade 2), and Xuchang 2 exhibits bilaterally large EAE (Grade 3), especially on the right side. These cranial remains join the other eastern Eurasian later Pleistocene humans in providing frequencies of 61% (N = 18) and 58% (N = 12) respectively for archaic and early modern human samples...
2017: PloS One
Elias Michaelides, Ankit Kansal, Sara Rutter, Christopher A Schutt
PURPOSE: To anatomically describe a cartilaginous cap attached to the lateral process of the malleus. STUDY DESIGN: Histologic and gross anatomic review. METHODS: Twenty temporal bones were histologically reviewed. The anatomical relationship between the tympanic membrane and malleus was then defined at the level of the lateral process of the malleus and the long process of the malleus. Separately, gross evaluation of these levels at the macroscopic level was undertaken through endoscopic imaging in five subjects...
October 25, 2017: American Journal of Otolaryngology
Saied Ghadersohi, Jonathan B Ida, Bharat Bhushan, Kathleen R Billings
INTRODUCTION: The prevalence of chronic otitis media with effusion (COME), and Eustachian tube dysfunction (ETD) is high in Down syndrome (DS) patients. This often necessitates multiple tympanostomy tube (TT) placements resulting in a higher rate of persistent tympanic membrane (TM) perforation requiring tympanoplasty for repair. OBJECTIVES: To assess risk factors for persistent perforation and outcomes of tympanoplasty in DS patients. METHODS: Retrospective case series of 91 ears in 69 DS patients with TM perforations, who were either observed or underwent tympanoplasty...
December 2017: International Journal of Pediatric Otorhinolaryngology
Es-Hak Bedri, Nebiat Teferi, Miriam Redleaf
: Tympanosclerosis in the middle ear space is common in Ethiopia and often involves the ossicles and particularly the stapes. Ear operations in Ethiopia are relatively expensive in this country of limited medical resources and a low average living wage. In this setting, 2-stage operations using prostheses become prohibitively expensive. Therefore, the recommended 2-stage approach for tympanic membrane perforation with tympanosclerosis and stapes fixation is impractical for Ethiopia.We present a series of 67 patients who had a single stage tympanoplasty, removal of tympanosclerosis from the stapes suprastructure, and ossicular chain reconstruction using ossicular interposition...
February 2018: Otology & Neurotology
Jeremy Wales, Kilian Gladiné, Paul Van de Heyning, Vedat Topsakal, Magnus von Unge, Joris Dirckx
Ossicular fixation through otosclerosis, chronic otitis media and other pathologies, especially tympanosclerosis, are treated by surgery if hearing aids fail as an alternative. However, the best hearing outcome is often based on knowledge of the degree and location of the fixation. Objective methods to quantify the degree and position of the fixation are largely lacking. Laser vibrometry is a known method to detect ossicular fixation but clinical applicability remains limited. A new method, minimally invasive laser vibrometry (MIVIB), is presented to quantify ossicle mobility using laser vibrometry measurement through the ear canal after elevating the tympanic membrane, thus making the method feasible in minimally invasive explorative surgery...
January 2018: Hearing Research
Christoph J Maurer, Antje Aschendorff, Horst Urbach
Paragangliomas can be diagnosed accurately using magnetic resonance imaging and dynamic four-dimensional magnetic resonance angiography. Four-dimensional imaging uses the highly vascularised structure of these tumours, which results in a homogenous capillary blush and usually, due to the arteriovenous shunting, in an early draining vein. By these features the tumour can be differentiated from other neoplasms. The authors describe a case of a paraganglioma localised in the middle ear of an elderly patient. Magnetic resonance contraindications led to preoperative diagnostics with high resolution computed tomography of the temporal bone and additionally computed tomography perfusion imaging instead of magnetic resonance imaging with four-dimensional magnetic resonance angiography...
January 1, 2017: Neuroradiology Journal
Ashita Ritesh Kalaskar, Ritesh Kalaskar
The tympanic plate is a small part of the temporal bone that separates the mandibular condyle from the external auditory canal. Fracture of this small plate is rare and usually associated with other bony fractures, mainly temporal and mandibular bone. There is a limited amount of literature on this subject, which increases the chance of cases being overlooked by physicians and radiologists. This is further supported by purely isolated cases of tympanic plate fracture without evidence of other bony fractures...
October 2017: Journal of the Korean Association of Oral and Maxillofacial Surgeons
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