Unicompartmental arthroplasty: a long-term follow-up study.
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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Department of Orthopaedic Surgery, Carolinas Medical Center, Charlotte, North Carolina 28232, USA.
Tabor
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D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000704:Analysis of Variance; D019645:Arthroplasty, Replacement, Knee; D004185:Disability Evaluation; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007719:Knee Joint / Q000000981:diagnostic imaging / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D009765:Obesity; D010003:Osteoarthritis / Q000601:surgery*; D011474:Prosthesis Design; D011475:Prosthesis Failure; D011859:Radiography; D012189:Retrospective Studies; D016019:Survival Analysis; D016896:Treatment Outcome