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Title
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A new finite-element model of the incudostapedial joint
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Author
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Abstract
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| Although the joints of the ossicular chain contribute significantly to sound transmission through the middle ear, the mechanical behaviour of these joints is poorly understood. We have previously presented finite-element (FE) models of the incudostapedial joint (ISJ) that were structurally based on histological serial sections and X-ray microCT scans, and that used plausible estimates for material-property parameters. Models with or without the presence of synovial fluid in the joint were made and preliminary simulations were compared with experimental tension and compression measurements. Later we presented an analytical model of the joint with a simplified geometry using the theory of large deformations of elastic membranes to model the joint capsule. Results indicated that the mechanical behaviour of the incudostapedial joint may be influenced by mechanical instabilities of the joint capsule. This was observed for forces near zero in a simulated tension-compression test and could result in a jump in the corresponding force-displacement curve. In this work, we present new finite-element simulations where we model the synovial gap with a liquid-like incompressible material and perform a sensitivity analysis to see the effect of various properties, such as capsule length, synovial-fluid volume, and joint cross-sectional shape on the mechanical behaviour of the joint. The results are compared with experimental results from the literature. |
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Language
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English
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Source (journal)
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AIP conference proceedings / American Institute of Physics. - New York
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Source (book)
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13th Mechanics of Hearing Workshop (MoH) on To Ear and Back Again -, Advances in Auditory Biophysics, JUN 19-24, 2017, St Catharines, CANADA
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Publication
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Melville
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Amer inst physics
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2018
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ISSN
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0094-243X
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ISBN
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978-0-7354-1670-3
978-0-7354-1670-3
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DOI
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10.1063/1.5038503
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Volume/pages
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1965
(2018)
, 7 p.
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Article Reference
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UNSP 110003
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ISI
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000461049900056
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Medium
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E-only publicatie
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Full text (Publisher's DOI)
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Full text (open access)
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