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;2017:1496379. doi: 10.1155/2017/1496379. Epub 2017 May 29.
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.
超重和肥胖会增加膝关节骨性关节炎的风险，而后者是导致残疾的主要原因之一。严重的膝关节骨性关节炎可以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，该组患者的治疗效果不如体重正常的患者。本文建立了两个计算机模型，以模拟在步态周期中，超重和肥胖对全膝关节置换术后股骨远端骨和接触压力的影响。数值结果表明，在站立阶段，股骨远端假体周围的骨会承受更大的压力，胫骨聚乙烯衬垫上的接触压力也会更高。基于计算机模拟结果和已发表的研究工作，对于超重患者，使用较厚的胫骨聚乙烯衬垫的非骨水泥全膝关节置换术可能是更好的选择。
