膝关节假体股胫接触面积的影响因素  

Influencing Factors of Femoro-Tibial Contact Area for Knee Prostheses

作　　者：王晓红[1,2,3] 宋大勇 董骧 王建 蒋磊 朱保璋 郑诚功 WANG Xiaohong;SONG Dayong;DONG Xiang;WANG Jian;JIANG Lei;ZHU Baozhang;CHENG Chengkung(School of Biological Science and Medical Engineering,Beihang University,Beijing 100083,China;Beijing Medical Implant Engineering Research Center,Beijing Naton Technology Group Co.,Ltd.,Beijing 100082,China;Beijing Engineering Laboratory of Functional Medical Materials and Devices,Beijing Naton Technology Group Co.,Ltd.,Beijing 100082,China;Beijing Advanced Innovation Centre for Biomedical Engineering,Beihang University,Beijing 100083,China)

机构地区：[1]北京航空航天大学生物与医学工程学院,北京100083 [2]北京纳通科技集团有限公司北京市医用内植物工程技术研究中心,北京100082 [3]北京纳通科技集团有限公司功能性医用材料与器械北京市工程实验室,北京100082 [4]北京航空航天大学生物医学工程高精尖创新中心,北京100083

出　　处：《医用生物力学》2019年第6期594-600,共7页Journal of Medical Biomechanics

基　　金：国家科技计划(国家重点研发计划)(210YBXM2016110002)

摘　　要：目的 通过建立自动化流程对膝关节假体股胫接触面积的影响因素进行分析,总结设计参数对接触面积的影响规律,并找到最大接触应力和接触面积之间的关系。方法 在Isight中建立参数化有限元模型,包括几何模型自动变参、自动化有限元前处理和有限元运算3个组件,实现自动化流程,提取接触面积进行统计学分析。结果有限元模型用Tekscan应力分布系统进行验证。当股骨、胫骨矢状面半径逐渐接近时,接触面积最大为295 mm^2。股骨矢状面半径对接触面积是正效应,而胫骨矢状面半径是负效应。最大接触应力和接触面积近似呈线性负相关。结论 通过分析股胫矢状面半径对接触面积和接触应力的影响规律,为临床降低衬垫磨损提供设计依据。Objective By developing an automatic procedure for optimization of femoro-tibial contact area for knee prosthesis,to summarize the influence pattern of design parameters on contact area,and discover the relationship between the maximum contact stress and contact area.Methods A parametric finite element(FE)model was developed in the Isight software,which included three components:automatic parameter changes for the geometric model,automatic modeling in the FE software,and automatic FE calculation.The automatic workflow was realized,and then contact areas were statistically analyzed.Results The FE model was validated by using Tekscan pressure distribution system.When the femoral sagittal radius was gradually close to the tibial sagittal radius,the contact area gradually reached to the maximum 295 mm^2.The femoral sagittal radius had a positive effect on contact area,while the tibial sagittal radius had a negative effect.The maximum contact stress had a linear relationship with contact area approximately.Conclusions This study analyzed the influence of femoro-tibial sagittal radius on contact stress and contact area,and the research findings would provide references for the design on reducing wear of tibial insert in clinic.

关 键 词：股胫接触面积 自动建模 有限元分析 股骨矢状面半径 胫骨矢状面半径 

分 类 号：R318.01[医药卫生—生物医学工程]