title: Management of extreme patella baja using in-situ hamstring tendon autograft.
abstract: Successful total knee arthroplasty requires a functioning extensor mechanism. Patella baja following total knee arthroplasty can cause extensor mechanism dysfunction and produce poor outcomes. We present a case of severe patella tendon shortening following revision total knee arthroplasty with almost complete ankylosis of the distal pole of the patella to the proximal tibia. This resulted in effective extensor mechanism dysfunction with pain and severely limited knee flexion. We report a novel method of reconstruction of the patella tendon at the time of revision arthroplasty together with the one-year clinical outcome and review of the literature.
authors.affiliation: Morriston Hospital Swansea, United Kingdom. Electronic address: Lawrence.moulton@doctors.net.uk.
authors.forename: L S
authors.initials: LS
authors.lastname: Moulton
authors.affiliation: Morriston Hospital Swansea, United Kingdom.
authors.forename: A P
authors.initials: AP
authors.lastname: Davies
mesh_terms: D000368:Aged; D000844:Ankylosis / Q000175:diagnosis / Q000209:etiology / Q000601:surgery*; D019645:Arthroplasty, Replacement, Knee / Q000009:adverse effects* / Q000295:instrumentation; D006801:Humans; D008297:Male; D017847:Patellar Ligament / Q000473:pathology* / Q000601:surgery*; D011475:Prosthesis Failure / Q000009:adverse effects*; D016059:Range of Motion, Articular; D012086:Reoperation; D013710:Tendons / Q000637:transplantation*; D016378:Tissue Transplantation; D014182:Transplantation, Autologous
keywords: Hamstring graft; Patella baja; Patella tendon reconstruction; Revision knee replacement; Total knee replacement