Introduction
knee arthroplasty, TKA, UC
The traditional post and cam-style posterior-stabilized (PS) total knee device has been widely used, since it first ushered in the era of modern total knee arthroplasty and remains commonly used today. The ultra-congruent design was introduced as an alternative option for PCL substitution [The UC design has potential advantages, namely that the congruency of the polyethylene insert may distribute surface loads better, thus potentially reducing wear and providing greater knee stability [The purpose of this prospective study was to compare the 5-year clinical outcomes and radiographic results of patients undergoing PCL-sacrificing total knee arthroplasty (TKA) receiving either a dished, congruent CS device, a PS device, or a UC device (Fig. Implant designs for condylar stabilized, posterior stabilized, and ultra-congruent