Dynamic properties of human incudostapedial joint-Experimental measurement and finite element modeling

Medical Engineering & Physics
Shangyuan Jiang, Rong Z Gan

Abstract

The incudostapedial joint (ISJ) is a synovial joint connecting the incus and stapes in the middle ear. Mechanical properties of the ISJ directly affect sound transmission from the tympanic membrane to the cochlea. However, how ISJ properties change with frequency has not been investigated. In this paper, we report the dynamic properties of the human ISJ measured in eight samples using a dynamic mechanical analyzer (DMA) for frequencies from 1 to 80 Hz at three temperatures of 5, 25 and 37 °C. The frequency-temperature superposition (FTS) principle was used to extrapolate the results to 8 kHz. The complex modulus of ISJ was measured with a mean storage modulus of 1.14 MPa at 1 Hz that increased to 3.01 MPa at 8 kHz, and a loss modulus that increased from 0.07 to 0.47 MPa. A 3-dimensional finite element (FE) model consisting of the articular cartilage, joint capsule and synovial fluid was then constructed to derive mechanical properties of ISJ components by matching the model results to experimental data. Modeling results showed that mechanical properties of the joint capsule and synovial fluid affected the dynamic behavior of the joint. This study contributes to a better understanding of the structure-function relationship of th...Continue Reading

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Citations

Oct 18, 2019·Journal of the Association for Research in Otolaryngology : JARO·Majid SoleimaniWillem F Decraemer
Aug 3, 2019·Biomechanics and Modeling in Mechanobiology·Pieter G G Muyshondt, Joris J J Dirckx
Feb 2, 2021·Hearing Research·Shangyuan JiangRong Z Gan
Jun 3, 2021·Journal of Clinical Medicine·Ivo DobrevChristof Röösli

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