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Articular contact kinematics of the knee before and after a cruciate retaining total knee arthroplasty
Author(s) -
Li Chunbao,
Hosseini Ali,
Tsai TsungYuan,
Kwon YoungMin,
Li Guoan
Publication year - 2015
Publication title -
journal of orthopaedic research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.041
H-Index - 155
eISSN - 1554-527X
pISSN - 0736-0266
DOI - 10.1002/jor.22764
Subject(s) - medicine , total knee arthroplasty , kinematics , osteoarthritis , biomechanics , range of motion , orthodontics , knee joint , arthroplasty , contact force , weight bearing , anatomy , surgery , physics , alternative medicine , classical mechanics , pathology , quantum mechanics
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. © 2014 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 33:???–???, 2015.