Comparison of the Insall-Burstein II and NexGen legacy total knee arthroplasty systems with respect to patella complications.

This study retrospectively contrasts 2 cohorts of consecutive patients ""(N = 202) after primary total knee arthroplasty with respect to the types and numbers of patella and extensor mechanism complications. Our results demonstrated an overall decrease of patellofemoral complications associated with the NexGen Legacy PS system (Zimmer Inc, Warsaw, Ind). Patella fractures decreased from 6 to 0 (P = .