title: Long-term outcomes of patellofemoral arthroplasty.
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>30 kg/m2) was higher than that in nonobese patients (P=.02).
authors.affiliation: Department of Orthopedic Surgery, Deventer Hospital, Deventer, The Netherlands.
authors.forename: Hans-Peter W
authors.initials: HP
authors.lastname: van Jonbergen
authors.forename: Dirk M
authors.initials: DM
authors.lastname: Werkman
authors.forename: Lex F
authors.initials: LF
authors.lastname: Barnaart
authors.forename: Albert
authors.initials: A
authors.lastname: van Kampen
mesh_terms: D000328:Adult; D000368:Aged; D019645:Arthroplasty, Replacement, Knee / Q000379:methods* / Q000401:mortality; D005260:Female; D005269:Femur / Q000601:surgery*; D005500:Follow-Up Studies; D006801:Humans; D053208:Kaplan-Meier Estimate; D008137:Longitudinal Studies; D008297:Male; D008875:Middle Aged; D020370:Osteoarthritis, Knee / Q000601:surgery*; D010329:Patella / Q000601:surgery*; D011475:Prosthesis Failure; D012086:Reoperation; D012189:Retrospective Studies; D015996:Survival Rate; D016896:Treatment Outcome