The clinical outcome of patellofemoral arthroplasty

Abstract

Patellofemoral arthroplasty has a long record of use in the treatment of isolated patellofemoral arthritis, with outcomes influenced by patient selection, surgical technique, and trochlear implant design. The trochlear components have evolved from inlay-style to onlay-style designs, which have reduced the incidence of patellar instability. Minimizing the risk of patellar instability with onlay-design patellofemoral arthroplasties has enhanced mid-term and long-term results and leaves progressive tibiofemoral arthritis as the primary failure mechanism beyond 10 to 15 years.

Keywords: Knee arthritis; Knee arthroplasty (replacement) design; Knee arthroplasty (replacement) results; Patellofemoral arthroplasty (replacement); Trochlea.