The Journal of Arthroplasty, Volume 27, Issue 6, 1196 - 1202

In Vivo Kinematic Analysis of Cruciate-Retaining Total Knee Arthroplasty During Weight-Bearing and Non–Weight-Bearing Deep Knee Bending

Horiuchi, Hiroshi et al.

The purpose of the present study was to evaluate the in vivo kinematics of the posterior cruciate ligament–retaining total knee arthroplasty during weight-bearing and non–weight-bearing deep knee bending and compare these 2 different conditions. We evaluated the in vivo kinematics of the knee using fluoroscopy and femorotibial translation relative to the tibia tray by 2-dimensional/3-dimensional registration. In the weight-bearing state, the femoral component showed central pivot and bicondylar posterior rollback pattern. During non–weight-bearing, the movement anteriorly occurred on both the medial and lateral side during early flexion, whereas bicondylar femoral component rollback occurred after that. During non–weight-bearing, both the medial and lateral condyle significantly moved anteriorly compared with the weight-bearing state during early flexion. However, bicondylar femoral rollback occurred under both these conditions.

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