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J Arthroplasty. 2010 Oct;25(7):1066-71. doi: 10.1016/j.arth.2009.08.023. Epub 2010 Jan 6.

Long-term outcomes of patellofemoral arthroplasty.

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Department of Orthopedic Surgery, Deventer Hospital, Deventer, The Netherlands.


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>30 kg/m2) was higher than that in nonobese patients (P=.02).

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