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research-article

Computational wear prediction for impact of kinematics boundary conditions on wear of total knee replacement using two cross-shear models

[+] Author and Article Information
Jing Zhang

CHANG'AN UNIVERSITY Middle-section of Nan'er Huan Road Xi'an, ShaanXi Province, 710064, China Xi'an, ShaanXi 710064 China zhangjing@chd.edu.cn

Zhenxian Chen

Chang'an University, Middle-section of Nan'er Huan Road Xi'an, ShaanXi Province,China Xi'an, Shaanxi 710064 China zhenxian_chen@yeah.net

Yongchang Gao

CHANG'AN UNIVERSITY Middle-section of Nan'er Huan Road Xi'an, ShaanXi Province, 710064, China Xi'an, ShaanXi 710064 China gyc1982@chd.edu.cn

Xuan Zhang

CHANG'AN UNIVERSITY Middle-section of Nan'er Huan Road Xi'an, ShaanXi Province, 710064, China Xi'an, ShaanXi 710064 China zhangxuan@chd.edu.cn

Lei Guo

CHANG'AN UNIVERSITY Middle-section of Nan'er Huan Road Xi'an, ShaanXi Province, 710064, China Xi'an, ShaanXi 710064 China lguo@chd.edu.cn

Zhongmin Jin

Southwest Jiaotong University, Chengdu, Sichuan, China Chengdu, 610031 China zmjin@swjtu.edu.cn

1Corresponding author.

Contributed by the Tribology Division of ASME for publication in the Journal of Tribology. Manuscript received March 19, 2019; final manuscript received July 23, 2019; published online xx xx, xxxx. Assoc. Editor: Bart Raeymaekers.

ASME doi:10.1115/1.4044377 History: Received March 19, 2019; Accepted July 25, 2019

Abstract

Wear particle-induced osteolysis is the main reason for the long-term failure of total knee replacement. Simulator testing is the standard procedure for validating wear performance pre-clinically. The load and kinematics specified in the ISO are standard input profiles for wear testing of implants. Directions of internal-external rotation and anterior-posterior translation have been modified in the new version of ISO 14243-3 2014. This study focused on investigating the effects of internal-external rotation and anterior-posterior translation on the wear of knee implants. Numerical wear prediction was performed using the finite element model along with two wear models, namely the contact pressure independent model and contact pressure dependent model. Addition of internal-external rotation significantly increased the wear, and the two wear models obtained similar results. The effect of internal-external rotation direction on wear was slight. Forward movement of the tibial insert during flexion decreased the wear under the contact pressure independent model and increased the wear under the contact pressure dependent model. When the AP direction switched, the two models obtained opposite wear tendencies. The results predicted by the contact pressure dependent model were consistent with those of wear tendency experiments reported in the literature. Further investigation of wear physical principles was necessary to gain a more reliable model. This study demonstrated that both internal-external rotation and anterior-posterior translation were pivotal factors influencing the contact mechanism and wear of total knee implants. More realistic kinematics are necessary for accurate wear assessment.

Copyright © 2019 by ASME
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