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Updated: May 8, 2026
Movement Retraining using Real-time Feedback of Performance
Published on: January 17, 2013
Does mobile-bearing knee arthroplasty motion change with activity?
Yoshinori Mikashima1, Yoshinori Ishii, Mitsuhiro Takeda
1Department of Orthopaedics, Takagi Hospital Oume Knee Surgery Center, Tokyo, Japan; Department of Mechanical & Aerospace Engineering, University of Florida, Gainesville, FL, USA.
Background:
The purpose of this study was to evaluate the effect of mobile-bearing implant design and activity on knee arthroplasty kinematics during three activities of daily living.
Methods:
In vivo kinematics were analyzed using 3D model registration from fluoroscopic images of non-weightbearing knee flexion-extension, weight-bearing squatting and stair activities in 20 knees in 10 patients with bilateral total knee arthroplasty. Each patient had one rotating-platform and one meniscal-bearing variant of the same prosthesis design.
Results:
Anteroposterior translations in meniscal-bearing knees were larger than those in rotating-platform knees for the different dynamic conditions. Meniscal-bearing knees showed more posterior femoral locations with activities that increased demand on the quadriceps. Condylar translations changed little in rotating-platform knees with different activities.
Conclusions:
Activity dynamics can have a significant influence on knee kinematics, and have a greater effect on the kinematics of unconstrained meniscal-bearing prostheses than rotating-platform knee prostheses.
Level Of Evidence:
Level II.
