Trajectory of bearing movement during Oxford mobile-bearing unicompartmental knee arthroplasty using a kinematic alignment technique  

作　　者：Xiaowei Sun Feifan Lu Wanshou Guo Liming Cheng Weiguo Wang Qidong Zhang 

机构地区：[1]Graduate School of Peking Union Medical College and Chinese Academy of Medical Sciences,Beijing 100730,China [2]Department of Orthopaedic Surgery,China-Japan Friendship Hospital,Beijing 100029,China [3]Department of Orthopedic Surgery,Nanfang Hospital,Southern Medical University,Guangzhou,Guangdong 510515,China.

出　　处：《Chinese Medical Journal》2023年第5期613-615,共3页中华医学杂志（英文版）

基　　金：Capital Health Research and Development of Special(No.2020-24067);National Natural Science Foundation of China(Nos.81972130 and 82072494);Elite Medical Professionals project of China-Japan Friendship Hospital(No.ZRJY2021-GG08)

摘　　要：To the Editor:Dislocation of the mobile bearing is the most common reason for revisions in Asian patients who undergo Oxford mobile-bearing unicompartmental knee arthroplasty(Oxford MB UKA),with an incidence rate as high as 7.9%.[1]Multiple studies have shown that the bearing dislocation rate is significantly higher in Asian than in Western patients.[2]A poor bearing movement trajectory was considered one of the risk factors.Malpositioning of the component results in a wider space between the margin of the bearing and the lateral wall of the tibial component,leading to a poor bearing movement trajectory and even bearing rotation.The superior surface is designed with high surrounding rims(higher in the anterior and posterior parts,lower in the medial and lateral parts).When rotation occurs,the lower rim loses its restriction to mutual movement of the bearing and femoral component,which leads to dislocation.

关 键 词：KNEE MOVEMENT MEDIAL 

分 类 号：R687.4[医药卫生—骨科学]