Funnell W Robert J, Heng Siah T, McKee Marc D, Daniel Sam J, Decraemer Willem F
Department of BioMedical Engineering, McGill University, 3775, rue University, Montréal, QC, Canada, H3A 2B4.
J Assoc Res Otolaryngol. 2005 Mar;6(1):9-18. doi: 10.1007/s10162-004-5016-3. Epub 2005 Apr 22.
The connection between the long process and the lenticular process of the incus is extremely fine, so much so that some authors have treated the lenticular process as a separate bone. We review descriptions of the lenticular process that have appeared in the literature, and present some new histological observations. We discuss the dimensions and composition of the lenticular process and of the incudostapedial joint, and present estimates of the material properties for the bone, cartilage, and ligament of which they are composed. We present a preliminary finite-element model which includes the lenticular plate, the bony pedicle connecting the lenticular plate to the long process, the head of the stapes, and the incudostapedial joint. The model has a much simplified geometry. We present simulation results for ranges of values for the material properties. We then present simulation results for this model when it is incorporated into an overall model of the middle ear of the cat. For the geometries and material properties used here, the bony pedicle is found to contribute significant flexibility to the coupling between the incus and the stapes.
砧骨长突与豆状突之间的连接极其纤细，以至于有些作者将豆状突视为一块独立的骨头。我们回顾了文献中出现的关于豆状突的描述，并给出了一些新的组织学观察结果。我们讨论了豆状突和砧镫关节的尺寸及组成，并给出了它们所由构成的骨、软骨和韧带的材料特性估计值。我们提出了一个初步的有限元模型，该模型包括豆状板、连接豆状板与长突的骨性蒂、镫骨头以及砧镫关节。该模型的几何形状大为简化。我们给出了材料特性取值范围内的模拟结果。然后，当将此模型纳入猫中耳的整体模型时，我们给出了该模型的模拟结果。对于此处使用的几何形状和材料特性，发现骨性蒂对砧骨与镫骨之间的耦合贡献了显著的灵活性。
