Unicompartmental arthroplasty: A long-term follow-up study
1998
Abstract Seventy-three consecutive unicompartmental knee arthroplasties (UKAs) using a Marmor-style non-metal-backed cemented tibial component were performed from 1975 to 1990. Sixty-seven knees (58 patients) were evaluated with minimum 5-year follow-up (mean, 9.7 years; range, 5–20 years). Knee rating and patient function were assessed using the updated Knee Society scoring system. Survivorship was 91% at 5 years, 84% at 10 years, and 79% at 15 years. The mean knee rating for surviving implants was 91 (range, 48–100), and mean functional score was 77 (range, 5–100). Survivorship and functional outcome were not affected by body habitus, age, gender, or tibial component thickness. UKA offers long-term relief of symptoms and excellent knee function in a high percentage of carefully selected patients with single compartment gonarthrosis.
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