外翻
单室膝关节置换术
冠状面
冯·米塞斯屈服准则
口腔正畸科
解剖
胫骨
压力(语言学)
关节置换术
骨关节炎
医学
材料科学
有限元法
外科
结构工程
工程类
语言学
哲学
替代医学
病理
作者
Xuesong Dai,Jinghua Fang,Lifeng Jiang,Yan Xiong,Miaofeng Zhang,Shibin Zhu
出处
期刊:Knee
[Elsevier]
日期:2018-06-01
卷期号:25 (3): 434-444
被引量:27
标识
DOI:10.1016/j.knee.2018.02.004
摘要
Background Medial unicompartmental knee arthroplasty (UKA) using Oxford mobile-bearing prosthesis is performed in the treatment of medial compartmental arthritis of the knee. However, little is known about the stress distributions for mobile-bearing UKA on the medial tibial plateau. Methods In this study, the stresses on the coronal plane were calculated in a three-dimensional model of the proximal tibia. The features of the stress distribution were investigated when the tibial tray was placed in 15°, 10°, six degrees, and three degrees varus, neutral (0°), and in three degrees, six degrees, 10°, and 15° valgus on the coronal plane of the medial plateau. Results The peak von Mises stress was found on the cortex below the medial plateau while the stresses of cortical bone increased gradually as the inclination of the tibial tray was changed from varus to valgus. The amount of peak stress was almost the same as that in the normal knee model when the tibial tray was placed in six degrees valgus and consistently lower in varus inclination than in the normal knee model. Conversely, the peak stress of soft bone was found at the bottom of the slot. Conclusions This study demonstrates that the inclination of the tibial component affects stress distribution in the proximal tibia after UKA. Slight varus inclination of the mobile-bearing tibial component is acceptable as it lowers the peak stress on the medial cortex. Additionally, placing the tibial tray in slight varus avoids a rise in stress between the tip of the keel and the medial tibial cortex.
科研通智能强力驱动
Strongly Powered by AbleSci AI