Cementless total knee arthroplasty in rheumatoid arthritis: A report on 51 AGC knees followed for 54 months

Fifty-one primary consecutive cementless AGC 2000 (Anatomically Graduated Components, Biomet, Warsaw, IN) total knee arthroplasties were performed during 1985 through 1990 in 40 patients with rheumatoid arthritis. Forty-one knees (32 patients) were available for clinical and radiologic follow-up analysis after 24 to 76 months (median, 54 months). There was no pain in 33 knees and mild pain in the rest. Median range of motion was 110° (range, 50°- 130°). Median knee score was 90 (range 71-97), and all knees were rated good or excellent. Radiolucencies greater than 1 mm were found under live tibial components, but no obvious migrations were seen. One tibial component was revised due to aseptic loosening. The cumulative success rate after 4 to 5 years was 97% (lower limit of 95% confidence interval, 91.8%). The medium-term results are considered to compare favorably with reported cemented series.