Fig. 2.

The mean rate of liner wear was 0.144 ± 0.031 mm/y (0.105–0.178 mm/y) in cup inclination angle between 50⁰–55⁰, and 0.260 ± 0.043 mm/y (0.215–0.394 mm/y) in angle between 55⁰–60⁰, 0.403 ± 0.016 mm/y (0.378–0.423 mm/y) in angle bigger than 60⁰. There are significant difference between three groups after paired T-test (P < 0.05).