Different femorotibial contact points between fixed- and mobile-bearing TKAs do not show clinical impact

Data from 78 patients with complete radiographs from a previous study comparing mobile- and fixed-bearing prosthesis were used in this study. The purpose of the study was to determine if anteroposterior gliding mobile-bearing total knee arthroplasty displayed a more anterior contact point in comparison with fixed-bearing prostheses and also, to determine if this contact point was related to anterior knee pain and functional outcomes. After 12 months, the results displayed that the mobile-bearing prostheses group had a significantly more anterior contact point that was not correlated to knee pain or functional outcomes. Both groups displayed similar knee scores, range of motion, pain scores and difficulty rising from a chair.