摘要:
目的 :构建一个能在普通计算机上使用的膝关节三维有限元模型 ,并进行初步生物力学分析 ,为个性化假体设计及3D打印提供仿真基础 .方法 :对健康成人志愿者进行CT扫描 ,导入Mimics软件中建立三维模型 ,再导入ANSYS软件中 ,通过定义单元类型、选择材料属性和划分网格 ,建立三维有限元模型 .结果 :三维有限元模型逼真、清晰、数据量小 ,适用于普通计算机 ;力学分析结果显示膝关节在伸直位时主应力最小 .结论 :基于Mimics及ANSYS软件 ,成功构建了能够在个人计算机上应用的膝关节三维有限元模型 ,对该模型生物力学分析显示 ,在个性化膝关节假体设计时 ,其形态应以病人自身膝关节伸直位为参考依据 .
Abstract:
Objective:To establish a three-dimensional finite element analysis model of the knee joint to be used on the ordinary computer and then to do a preliminary biomechanical analysis ,w hich could provide a simulated foundation for personalized prosthesis design and 3-D printing .Methods :CT scan results of healthy adult volunteers were imported into Mimics software to set up a three-dimensional model ,and then were imported into ANSYS software to establish the three-dimensional finite element model by defi-ning a unit type ,choosing material properties and meshing .Results:The three-dimensional finite element model was mimic and clear which could be used on the ordinary computer .Mechanics analysis results showed that the main stress on the knee extension position was minimum .Conclusion :Based on Mimics and ANSYS software ,a three-dimensional finite element model of the knee joint was established success-fully which could be applied on a personal computer .Biomechanical analysis of the model showed that in personalized design of the shape of the knee implant ,the patient's own knee extension position should be taken for reference .
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