Results of surface replacement proximal interphalangeal joint arthroplasty

ObjectivesTo evaluate the clinical results and functional outcome measures of surface replacement proximal interphalangeal joint arthroplasty.MethodsProximal interphalangeal joint surface arthroplasties (PIP-SRA) performed by a single surgeon were retrospectively reviewed. Arthroplasties were analysed by radiological and clinical review. Clinical review measured: preoperative and postoperative flexion and extension of the PIPJ; arc of motion; distance to the distal palmar crease (DPC); and Disabilities of the Arm, Shoulder and Hand (DASH) score survey.ResultsForty-eight PIPJ replacements were performed on 24 women and 9 men from 2001 to 2011. Eight patients had more than one joint replacement. The average patient age was 64 years (range 40–84). The average length of follow up was 18 months (range 2–91). The arc of motion improved on average 26° from 55° preoperatively to 81° postoperatively (range 15–150). The average postoperative DPC was 1.8 cm (range 0–8.0) and the average postoperative DASH score 28 (range 1–67). Eleven of the forty-eight joints hyperextended greater than 0° and of these three joints hyperextended greater than 10°. There were four severe flexion contractures.ConclusionsMost patients achieved a functional range of motion and the improvement in arc of motion was excellent. Several patients hyperextended and four had severe flexion contractures. There was a low operation rate but a short follow up makes this difficult to interpret for significance.