| The ostrich middle ear for developing an ideal ossicular replacement prosthesis. | |
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MedLine Citation:
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PMID: 22210477 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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The aim of the study was to investigate the validity of the avian middle ear model for researching the tympanoplasty mechanics. We studied the morphological details, acoustic transmission and quasi-static behavior of the ostrich tympano-ossicular system. The stained specimens of the ostrich middle ear were examined under a light microscope. The sound transfer function and quasi-static performance of the ostrich middle ear were evaluated using laser Doppler vibrometry. The application of pressure to the tip of the extracolumella causes a buckling movement of the ossicle between the cartilaginous and bony parts. Histologically, the intracolumellar connection can be identified as a junction zone between bone and hyaline cartilage. Sound conduction through the human middle ear is less effective than it is through the ostrich middle ear. The greatest difference (35 dB) was observed in the low-frequency region. Because the extracolumella bends, the medial displacements of the eardrum were not fully transmitted to the footplate. The amplitude of the ostrich columella footplate quasi-static medial displacements significantly exceeded that of the human footplate in both intact and reconstructed middle ears. The ostrich middle ear is a suitable model for designing total ossicular replacement implants. The main protective mechanism in the ostrich middle ear under quasi-static stress is a buckling movement of the extracolumella. The total ossicular prostheses of the new generation should contain an elastic element that allows an adaptation to greater quasi-static eardrum movements. |
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Authors:
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Irina Arechvo; Thomas Zahnert; Matthias Bornitz; Marcus Neudert; Nikoloz Lasurashvili; Renata Simkunaite-Rizgeliene; Thomas Beleites |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-1-1 |
Journal Detail:
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Title: European archives of oto-rhino-laryngology : official journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery Volume: - ISSN: 1434-4726 ISO Abbreviation: - Publication Date: 2012 Jan |
Date Detail:
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Created Date: 2012-1-2 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9002937 Medline TA: Eur Arch Otorhinolaryngol Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Department of Ear, Nose and Throat Diseases, Vilnius University Emergency Hospital, Siltnamiu 29, 04130, Vilnius, Lithuania, arechvo@gmail.com. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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