在执行常见任务时，对掌指关节中手指关节应力的三维有限元分析。
A three-dimensional finite element analysis of finger joint stresses in the MCP joint while performing common tasks.
作者信息
Butz Kent D, Merrell Greg, Nauman Eric A
机构信息
School of Mechanical Engineering, Purdue University, 585 Purdue Mall, West Lafayette, IN 47907-2088 USA.
出版信息
Hand (N Y). 2012 Sep;7(3):341-5. doi: 10.1007/s11552-012-9430-4.
The goal of this study was to develop a three-dimensional finite element model of the metacarpophalangeal (MCP) joint to characterize joint contact stresses incurred during common daily activities. The metacarpal and proximal phalanx were modeled using a COMSOL-based finite element analysis. Muscle forces determined from a static force analysis of two common activities (pen grip and carrying a weight) were applied to the simulation to characterize the surface stress distributions at the MCP joint. The finite element analysis predicted that stresses as high as 1.9 MPa, similar in magnitude to stresses experienced at the hip, may be experienced by the subchondral bone in the MCP joint. The internal structure and material properties of the phalanges were found to play a significant role in both the magnitude and distribution of stresses, but the dependence on cancellous bone modulus was not as severe as predicted by previous two dimensional models.
本研究的目的是建立一个掌指（MCP）关节的三维有限元模型，以表征日常常见活动中产生的关节接触应力。掌骨和近节指骨采用基于COMSOL的有限元分析进行建模。通过对两种常见活动（握笔和负重）进行静态力分析确定的肌肉力应用于模拟，以表征MCP关节处的表面应力分布。有限元分析预测，MCP关节的软骨下骨可能承受高达1.9MPa的应力，其大小与髋关节承受的应力相似。研究发现，指骨的内部结构和材料特性在应力的大小和分布中都起着重要作用，但对松质骨模量的依赖性并不像先前二维模型预测的那么严重。
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