Articular contact kinematics of the knee before and after a cruciate retaining total knee arthroplasty.

Abstract

Accurate knowledge of tibiofemoral articular contact kinematics of the knee after total knee arthroplasty (TKA) is important for understanding the intrinsic knee biomechanics and improving the longevity of the components. The objective of this study was to compare the in vivo articular contact kinematics of the knees with end-stage medial osteoarthritis (OA) during a weight-bearing, single leg lunge activity before and after a posterior cruciate retaining TKA (CR-TKA) using a dual fluoroscopic imaging technique. We found that the CR-TKA resulted in more posterior contact positions on the tibial surface and a reduced range of motion in the medial and lateral compartments. The distances between medial and lateral contact locations in the CR-TKA knees were statistically larger than the OA knees. The articular contact centers have shifted from medial side of the tibial plateau pre-operatively to the lateral side after operation. This study indicated that the CR-TKA resulted in significant changes in contact kinematics of the knees in both anteroposterior and mediolateral directions. Further studies are needed to determine the influence of the altered in vivo contact kinematics on the longevity of polyethylene liner and long term clinical outcomes of the TKA.

DOI: 10.1002/jor.22764
020040060020162017
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@article{Li2015ArticularCK, title={Articular contact kinematics of the knee before and after a cruciate retaining total knee arthroplasty.}, author={Chunbao Li and Ali Hosseini and Tsung-Yuan Tsai and Young-Min Kwon and Guoan Li}, journal={Journal of orthopaedic research : official publication of the Orthopaedic Research Society}, year={2015}, volume={33 3}, pages={349-58} }