Comparison of Kinematics and Contact Mechanics in Normal Knee and Total Knee Replacements: A Computational Investigation

被引：0
作者：
Liming Shu
Takashi Sato
Xijin Hua
Naohiko Sugita
机构：
[1] The University of Tokyo,Department of Mechanical Engineering, School of Engineering
[2] Niigata Medical Center,Department of Engineering, Institute for Manufacturing
[3] University of Cambridge,undefined
来源：
Annals of Biomedical Engineering | 2021年 / 49卷
关键词：
Knee; Kinematics; Contact mechanics; Finite element analysis; Total knee replacement;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
An objective of total knee replacement (TKR) is to restore the mechanical function of a normal knee. Joint kinematics and contact mechanics performance are two of the primary indices that indicate the success of TKR devices. The aim of this study was to compare the kinematics and contact mechanics of TKR and normal knee joints. An experimentally evaluated finite-element (FE) knee model was developed and used to investigate the performance of four TKR designs (fixed cruciate-retaining (CR), mobile CR, posterior-stabilized (PS), medial pivot design (MP)) and the normal knee joint during a gait cycle. The predicted kinematic results showed that the MP design presented similar kinematics to those of the normal knee joint and did not demonstrate paradoxical motion of the femur. A considerably larger contact area and lower contact pressure were found on the normal knee joint (1315 mm2, and 14.8 MPa, respectively) than on the TKRs, which was consistent with the previous in-vivo fluoroscopic investigation. The mobile CR and PS designs exhibited the smallest and greatest contact pressures of the four TKR designs, respectively. The results of the present study help to understand the kinematics and contact mechanics in the TKR during the gait cycle, and provide comprehensive information about the performance of the normal knee joint.
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页码：2491 / 2502
页数：11
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