Wang Changjiang, Guo Yuan, Shi Junfen, Chen Weiyi
Institute of Applied Mechanics and Biomedical Engineering, Taiyuan University of Technology, Taiyuan, Shanxi 030024, China
School of Engineering and Informatics, University of Sussex, Brighton BN1 9QJ, UK
J Healthc Eng. 2017;2017. doi: 10.1155/2017/1496379.
Overweight and obesity increase risks of knee osteoarthritis, which is a major cause of disability. Severe knee osteoarthritis can be treated by knee arthroplasty. Total knee arthroplasty has been used in overweight and obese patients; however, clinical reports showed that the outcome of this group of patients was not good as normal-weight patients. Two computer models were created in this paper to simulate the effect of excess loads on the distal femoral bone and contact pressures in total knee arthroplasty during a gait cycle. The numerical results showed increased stress in periprosthetic distal femoral bones and higher contact pressure on tibial polyethylene insert during the stance phase. Based on the computer simulation results and published research work, cementless total knee arthroplasty with thicker tibial polyethylene insert may be a better option for overweight patients.
超重和肥胖会增加患膝关节骨关节炎的风险，而膝关节骨关节炎是导致残疾的主要原因。严重的膝关节骨关节炎可通过膝关节置换术进行治疗。全膝关节置换术已应用于超重和肥胖患者；然而，临床报告显示，这组患者的手术效果不如体重正常的患者。本文创建了两个计算机模型，以模拟在步态周期中额外负荷对全膝关节置换术中股骨远端骨和接触压力的影响。数值结果表明，在站立阶段，假体周围股骨远端骨的应力增加，胫骨聚乙烯植入物上的接触压力更高。基于计算机模拟结果和已发表的研究工作，采用较厚胫骨聚乙烯植入物的非骨水泥全膝关节置换术可能是超重患者的更好选择。
