Fig. 2.

Kaplan-Meier survivorship analysis curves are shown. Considering revision for any reason as the end point, 20-year survivorship was 0.83 (95% confidence interval, 0.74–0.92) in the fixed-bearing group with 10 patients revised for wear and/or arthritis progression. Considering revision for any reason as the end point, the 20-year survivorship was 0.8 (95% confidence interval, 0.81–0.95) in the mobile-bearing group with 12 patients revised for aseptic loosening, dislocation, or arthritis progression. The log-rank test demonstrated no difference (p = 0.44) between the two groups.