新型运动模式铰链膝关节假体磨损有限元分析  

The Wear on a Novel Motion Mode Hinged Knee Prosthesis:A Finite Element Analysis

作　　者：孔令跃[1] 张静 田东牧 张净宇 胡永成[4] KONG Lingyue;ZHANG Jing;TIAN Dongmu;ZHANG Jingyu;HU Yongcheng(Sports Medicine Center,the Second Affiliated Hospital of Inner Mongolia Medical University,Hohhot 010000,China;School of Construction Machinery,Chang'an University,Xi'an 710064,China;Beijing Weigao Yahua Artificial Joint Development Company,Beijing 101301,China;Department of Bone and Soft Tissue Oncology,Tianjin Hospital,Tianjin 30021l,China)

机构地区：[1]内蒙古医科大学第二附属医院运动医学中心,呼和浩特010000 [2]长安大学工程机械学院,西安710064 [3]北京威高亚华人工关节开发有限公司,北京101301 [4]天津市天津医院骨与软组织肿瘤科,天津300211

出　　处：《医用生物力学》2023年第1期97-103,共7页Journal of Medical Biomechanics

基　　金：天津市卫生健康科研项目(TJWJ2022MS024)。

摘　　要：目的 对新型球轴运动模式铰链膝关节假体进行有限元分析,研究假体磨损仿真的方法及运动方式对假体磨损的影响。方法 基于球轴假体接触力学有限元模型,根据Archard磨损理论,建立磨损有限元模型,以各种运动数据为加载条件,模拟生理活动下膝关节的力学环境,研究球轴假体磨损情况。结果 对于胫骨衬垫,上下楼时平均和最大接触应力均高于步行,上楼时累积磨损体积大于下楼和步行,且磨损均主要发生在衬垫下表面。对于球轴衬套,仅步行时存在短时间接触和磨损,累积磨损体积为0.19 mm^(3)。结论 铰链膝关节假体的球轴运动模式可改善置换后膝关节力学环境,降低衬套磨损,延长假体生存期。有限元仿真可有效预测铰链假体的磨损,为其设计及改进提供理论支持。Objective To perform finite element analysis on a novel motion mode hinged knee prosthesis,and investigate the method of wear simulation on hinged prosthesis and the influence of motion mode on wear of the prosthesis.Methods Based on the finite element model of contact stress on spherical axis prosthesis,the finite element model of wear was established according to Archard wear theory.The kinematics data during different motions were input as loading condition to simulate mechanical environment of the knee arthroplasty in physiological activities.The wear results of spherical axis prosthesis were studied.Results For tibial insert,the average and maximum contact stresses during upstairs and downstairs climbing were higher than those during walking,and the cumulative wear volume during upstairs climbing was larger than that during downstairs climbing and walking.The wear mainly occurred on lower surface of tibial insert during all 3 motions.For rotating bushing,there was only a short period of contact and wear during walking,and the cumulative wear was 0.19 mm^(3).Conclusions The spherical axis motion of hinged knee prosthesis can improve the mechanical environment of knee,reduce the wear of rotating bushing,and prolong the prosthesis survival.The finite element simulation can predict the wear of hinged prosthesis effectively,and provide the theoretical basis for design and improvement of the prosthesis.

关 键 词：铰链膝关节假体 假体设计 磨损 有限元分析 

分 类 号：R318.01[医药卫生—生物医学工程]