Wear Simulation on Tibiofemoral Joint Surface of Rotating Hinge Knee Prosthesis
10.16156/j.1004-7220.2022.04.03
- VernacularTitle:旋转铰链型膝关节假体股胫关节面的磨损研究
- Author:
Ji ZHANG
1
;
Kunxi LIU
1
,
2
;
Xingchen ZHOU
1
;
Jiawei TANG
1
;
Xiaoyu ZHU
1
;
Feng ZHAO
1
;
Yubo FAN
1
Author Information
1. Beijing Advanced Innovation Center for Biomedical Engineering, Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University
2. Beijing AKEC Medical Co., Ltd.
- Publication Type:Journal Article
- Keywords:
rotating hinge knee prosthesis (RHKP);
mass wear rate;
in vitro wear experiment
- From:
Journal of Medical Biomechanics
2022;37(4):E591-E596
- CountryChina
- Language:Chinese
-
Abstract:
Objective To study the wear condition of rotating hinge knee prosthesis (RHKP) during horizontal walking gait, and provide technical references for wear prediction and clinical application of this kind of prosthesis. Methods A finite element wear model of RHKP was established based on the standard ISO 14243, and the simulation results including the wear distribution and mass wear rate of tibiofemoral joint surface were compared with the results from in vitro experiments on the same type of prosthesis. Results The mass wear rate of the polyethylene insert was 26.01 mg/MC (million cycle)from finite element analysis (FEA) and (30.06±1.21) mg/MC from in vitro experiments, and the mass wear rate of the upper surface of polyethene insert from FEA was about 3.3 times that of the lower surface. The wear area obtained by FEA was basically consistent with that obtained by in vitro wear measurement. The main wear area was symmetrically distributed in the middle and back of the upper surface. Conclusions The mass wear rate of RHKP, as a semi-restrictive prosthesis, is obviously higher than that of primary total knee joint prosthesis. More attention should be paid to wear test and evaluation of RHKP.
