Simulation of a knee joint replacement during a gait cycle using explicit finite element analysis
Simulation of a knee joint replacement during a gait cycle using explicit finite element analysis
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DOI：
10.1016/s0021-9290(01)00179-8
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发表时间：
2002-02-01
影响因子：
2.4
通讯作者：
Gregson, PJ
中科院分区：
文献类型：
--
作者：
Godest, AC;Beaugonin, M;Gregson, PJ
全膝关节置换术的聚乙烯插入物内的应力分布取决于运动学，而运动学又取决于关节面的设计、部件的相对位置和周围软组织的张力。隐式有限元分析技术以前已用于检查聚乙烯应力。然而，这些基本上都是静态分析，因此忽略了运动学的影响。这项工作的目的是使用明确的有限元方法来模拟运动学和内应力在一个单一的分析。在膝关节磨损模拟器中对单次步态周期的全膝关节置换术进行了仿真，并将仿真结果与实验数据进行了比较。预测的运动学与实验数据吻合较好。发现各种解相关参数对预测的运动学影响很小。发现预测应力依赖于网格密度。该研究表明，显式有限元方法能够以相对较低的计算成本在单次分析中预测运动学和应力。(C) 2002 Elsevier Science Ltd.版权所有。
The stress distribution within the polyethylene insert of a total knee joint replacement is dependent on the kinematics, which in turn are dependent on the design of the articulating surfaces, the relative position of the components and the tension of the surrounding soft tissues. Implicit finite element analysis techniques have been used previously to examine the polyethylene stresses. However, these have essentially been static analyses and hence ignored the influence of the kinematics. The aim of this work was to use an explicit finite element approach to simulate both the kinematics and the internal stresses within a single analysis. A simulation of a total knee joint replacement subjected to a single gait cycle within a knee wear simulator was performed and the results were compared with experimental data.The predicted kinematics were in close agreement with the experimental data. Various solution-dependent parameters were found to have little influence on the predicted kinematics. The predicted stresses were found to be dependent on the mesh density. This study has shown that an explicit finite element approach is capable of predicting the kinematics and the stresses within a single analysis at relatively low computational cost. (C) 2002 Elsevier Science Ltd. All rights reserved.