Long-Term Outcomes of Patellofemoral Arthroplasty

Hans-Peter W. van Jonbergen, MD,* Dirk M. Werkman, MD,* Lex F. Barnaart, MD, PhD,* and Albert van Kampen, MD, PhD†

* Department of Orthopedic Surgery, Deventer Hospital, Deventer, The Netherlands
† Department of Orthopaedic Surgery and Orthopaedic Research Laboratory, University Medical Center St Radboud, Nijmegen, The Netherlands

The Journal of Arthroplasty, Volume 25, Number 7 2010

Abstract: The purpose of this study was to correlate the long-term survival of patellofemoral arthroplasty with primary diagnosis, age, sex, and body mass index. One hundred eighty-five consecutive Richards type II patellofemoral arthroplasties were performed in 161 patients with isolated patellofemoral osteoarthritis. Diagnoses included primary patellofemoral osteoarthritis, posttraumatic patellofemoral osteoarthritis, and patellofemoral osteoarthritis with a previous realignment procedure for patellar subluxation or trochlear dysplasia. Median time to follow-up was 13.3 (range, 2.0-30.6) years. Patellofemoral arthroplasty survival was 84% at 10 years and 69% at 20 years. Primary diagnosis, sex, or age at patellofemoral arthroplasty did not significantly affect the rate of revision (P = .35, P = .24, and P = .65, respectively). The rate of revision in obese patients (body mass index N30 kg/m2) was higher than that in nonobese patients (P = .02).