全膝关节假体三维有限元模型的建立

背景：由于全膝关节的结构形态具有运动复杂、受力复杂等特性，造成了数据采集，模型建立困难，影响了三维实体模型的准确性。 目的：建立全膝关节假体三维有限元模型。 方法：通过Microscribe G2三维定位扫描仪取得假体数据、Geomagic软件进行曲面拟合、导入大型有限元分析软件Abaqus6.7.2建立全膝关节假体三维有限元模型，对如何提高三维有限元模型的精确性，扩大模型的开放性以及提高建模效率，增加关节外科医师在建模过程中的参与性进行探讨。 结果与结论：通过Microscribe G2三维定位扫描仪取得假体数据、Geomagic软件进行曲面拟合、导入大型有限元分析软件Abaqus6.7.2建立了全膝关节假体三维有限元模型。与以往建模方法比较，该模块设计使模型更加精准，使用更灵活，简化了有限元前期处理过程，明显降低了建模难度，提高了建模效率，增加了模型的扩展形，并获得了更高的精度。

Construction of a three-dimensional finite element model of total knee prosthesis

BACKGROUND: Due to the complexity of the movement and stress of the knee prosthesis, it is difficult to establish a knee prosthesis model and to capture the data. The accuracy of three-dimensional (3-D) model of the knee prosthesis is affected by many factors. OBJECTIVE: To establish 3-D finite element model of total knee prosthesis. METHODS: 3-D scanning technology was used to capture the image data. Geomagic and Abaqus software was utilized to rebuild 3-D total knee prosthesis model based on the scanned images and image data. It is discussed to improve the accuracy, the opening and the efficiency of the reconstruction of the 3-D finite element model. RESULTS AND CONCLUSION: The 3-D finite element model of knee prosthesis was successfully established by Geomagic and Abaqus software based on the scanned images and image data. Compared with the previews method of the knee prosthesis model reconstruction, the design of this new model is more accurate and flexible. Especially, it simplifies the procedure of the finite element analysis. And the possibility for joint surgeons to participate in building this model is increased. A more simple and accurate knee prosthesis finite model could be provided to the clinics.