The Avon patellofemoral joint arthroplasty: two- to 18-year results of a large single-centre cohort

The Bone & Joint Journal
Andrew J MetcalfeAndrew J Porteous

Abstract

This study reports on the medium- to long-term implant survivorship and patient-reported outcomes for the Avon patellofemoral joint (PFJ) arthroplasty. A total of 558 Avon PFJ arthroplasties in 431 patients, with minimum two-year follow-up, were identified from a prospective database. Patient-reported outcomes and implant survivorship were analyzed, with follow-up of up to 18 years. Outcomes were recorded for 483 implants (368 patients), representing an 86% follow-up rate. The median postoperative Oxford Knee Score (0 to 48 scale) was 35 (interquartile range (IQR) 25.5 to 43) and the median Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC, 0 to 100 scale) was 35 (IQR 25 to 53) at two years. There were 105 revisions, 61 (58%) for progression of osteoarthritis. All documented revisions were to primary knee systems without augmentation. The implant survival rate was 77.3% (95% confidence interval (CI) 72.4 to 81.7, number at risk 204) at ten years and 67.4% (95% CI 72.4 to 81.7 number at risk 45) at 15 years. Regression analysis of explanatory data variable showed that cases performed in the last nine years had improved survival compared with the first nine years of the cohort, but the individual operating sur...Continue Reading

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Citations

Aug 1, 2019·The Bone & Joint Journal·Fares S Haddad, B A Masri
Apr 30, 2020·Clinical Orthopaedics and Related Research·Peter L LewisHeather A Prentice
Aug 1, 2020·The Bone & Joint Journal·James A KennedyDavid W Murray
Sep 25, 2020·Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA·Christopher D BernardDiane L Dahm
Aug 28, 2020·Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA·Jonas PogorzelskiMatthias J Feucht
Oct 31, 2020·Archives of Orthopaedic and Trauma Surgery·Matthias J FeuchtJonas Pogorzelski
Apr 3, 2021·The Journal of Arthroplasty·Jordan C VillaKatharine D Harper

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