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Long-term results of patellofemoral arthroplasty

A REPORT OF 56 ARTHROPLASTIES WITH 17 YEARS OF FOLLOW-UP

Sint Lucas Andreas Ziekenhuis, Jan Tooropstraat 164, 1061 AE Amsterdam, The Netherlands.

A. P. P. M. Driessen, MD, PhD, Orthopaedic Surgeon

Stichting Deventer Ziekenhuizen, H. J. P. Fesevurstraat 7, 7415 CM Deventer, The Netherlands.

J. R van Horn, MD, PhD, Orthopaedic Surgeon, Head of Department

University Hospital Groningen, Hanzeplein 1, PO Box 30001, 9700 RB Groningen, The Netherlands.

Correspondence should be sent to Dr H. J. Kooijman.

We studied retrospectively the outcome of patellofemoral arthroplasty (PFA) using the Richards prosthesis in 51 patients (56 knees). Their mean age was 50 years (30 to 77). In 43 patients (45 knees), the American Knee Society score and the patients’ subjective judgement were assessed. Excellent or good results were obtained in 86% of cases at a mean follow-up of 17 years (15 to 21).

Because of ongoing tibiofemoral osteoarthritis, two patients required a high tibial osteotomy and ten PFAs were converted to a total knee arthroplasty after a mean of 15.6 years (10 to 21). The PFAs were stable during follow-up with a loosening rate of only 2%.

We conclude that a patellofemoral prosthesis is a good treatment option with successful long-term results in middle-aged patients with radiologically documented, isolated, patellofemoral osteoarthritis.

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