Constraint choice in revision knee arthroplasty
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ORIGINAL PAPER
Constraint choice in revision knee arthroplasty Michele Vasso & Philippe Beaufils & Alfredo Schiavone Panni
Received: 10 April 2013 / Accepted: 1 May 2013 / Published online: 23 May 2013 # Springer-Verlag Berlin Heidelberg 2013
Abstract Purpose Along with the increase in primary total knee arthroplasty, there has been an increase in the number of revisions. The aim of this study was to propose a selection algorithm for the knee revision constraint according to the state of ligaments and to the bone defects Anderson Orthopaedic Research Institute Classification [AORI] classification. The hypothesis was that this algorithm would facilitate the appropriate choice of prosthesis constraint, thus providing stable components and a good long-term survivorship of the knee revisions. Methods Sixty consecutive revision knee arthroplasties in 57 patients were prospectively evaluated. Prostheses implanted at revision included postero-stabilised, condylar constrained and rotating hinged, relative to the state of the ligaments and of the bone loss around the knee. The median follow-up was nine years (range, 4–12). Results The median IKS knee and function scores and HSS score were 41 (15–62), 21.5 (12–43) and 34 (23–65) points, respectively, before the operation, and 81 (48–97), 79 (56– 92) and 83.5 (62–98) points (p
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