Contact mechanics and lubrication analyses of ceramic-on-metal total hip replacements

► Steady-state contact mechanics and EHL and transient EHL of CoM THRs were analyzed. ► Pressures of CoM THRs showed typical characteristics of hard-on-hard hip bearings. ► Head radius and radial clearance are important parameters for CoM THRs. ► Film thickness of CoM THR was thicker than CoC bearing, but thinner than MoM THR. ► CoC and CoM THRs are more likely to benefit full film lubrication than MoM THR