A study of the control of disc movement within the temporomandibular joint using the finite element technique
A study of the control of disc movement within the temporomandibular joint using the finite element technique
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DOI：
10.1016/s0278-2391(96)90259-1
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发表时间：
1996-12-01
影响因子：
1.9
通讯作者：
Lew, D
中科院分区：
文献类型：
--
作者：
DeVocht, JW;Goel, VK;Lew, D
目的：建立二维有限元模型，模拟和研究正常活动范围内人颞下颌关节（TMJ）的生物力学和机制。材料与方法：使用商业上可获得的ABAQUS软件开发并运行非线性模型，该软件具有允许大位移和任意表面接触的滑移线元件，该模型的三个主要组成部分是下颌髁突，关节盘和颞骨的关节窝区域，它们都被建模为可变形体。通过对许多小步骤中的每一个进行静态分析来模拟连续运动，通过确定三个主要部件中每一个的最大应力作为关节盘弹性的函数来进行参数研究，结果：发现关节盘以逼真的方式沿着与髁状突一起运动，即使在盘上没有附着物时，应力分布图显示，在大多数步骤中，关节盂窝深处的应力相对较高。所有三个组件的最大应力与椎间盘刚度之间存在直接的非线性关系。该模型表明，肌肉收缩不需要维持适当的椎间盘位置，正常运动导致关节窝深处的应力相对较高，体内关节盘的弹性可能更接近报告值的下限。
Purpose: A two-dimensional finite element model was developed to simulate and study the in vivo biomechanics and mechanisms of the human temperomandibular joint (TMJ) over the range of normal motion.Materials and Methods: A nonlinear model was developed and run using the commercially available ABAQUS software with slide line elements that allowed large displacements and arbitrary contact of surfaces, The three main components of the model were the mandibular condyle, articular disc, and glenoid fossa region of the temporal bone, which were all modeled as deformable bodies. Continuous motion was simulated by doing a static analysis for each of many small steps, A parametric study was performed by determining the maximum stress in each of the three main components as a function of the elasticity of the articular disc,Results: The articular disc was found to move along with condyle in a lifelike manner, even when there were no attachments to the disc, Stress distribution plots showed relatively high stresses deep in the glenoid fossa for most steps, There was a direct, although nonlinear, relationship between maximum stress for all three components and the stiffness of the disc.Conclusions: This model suggests that muscle contraction is not required to maintain proper disc position, Normal motion results in relatively high stresses deep in the glenoid fossa, The elasticity of the in vivo articular disc may be closer to the lower end of the reported values.