Long-Term Follow-Up of Swanson’s Silastic Arthroplasty of the Metacarpophalangeal Joints in Rheumatoid Arthritis

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Abstract
77 patients with rheumatoid arthritis, 62 female and 15 male, underwent metacarpophalangeal joint arthroplasty on 375 joints using the Swanson design silicone rubber spacer between 1976 and 1985. Retrospectively, 48 of these patients were evaluated by postal questionnaire and 35 of them also underwent objective assessment at intervals ranging from five to 14 years post-operatively. Objective variables recorded included range of active motion, recurrence of ulnar drift and radiographic appearances. Both in the early and late stages, the vast majority of patients were satisfied with the outcome, with abolition of pain, correction of deformity and improved range of motion. There was some loss of mobility with time. However, functional improvement was maintained in the majority. Complication rates compare favourably with other reported series and no case of silicone synovitis was diagnosed. We agree with previous studies that the procedure is useful for lasting relief of pain and enhancement of a patient’s sense of well-being and is associated with few complications.

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