The present evidence indicated the similar performance in survivorship among CoC , CoPc , CoPxl and MoPxl bearing implants , and that all likely have superiority compared with the MoM and MoPc bearing implants in THA procedures .
PURPOSE Although many  total hip bearing implants  are widely used all over the world , simultaneous comparisons across the numerous available bearing surfaces are rare .
The purpose of this study was to compare the survivorship of total hip arthroplasty ( THA ) with six available bearing implants .
Prospective randomized trial comparing alumina ceramic-on-ceramic with ceramic-on-conventional polyethylene bearings in total hip arthroplasty.
This prospect i ve r and omized study aims to compare the outcome between an alumina ceramic-on-ceramic ( CC ) articulation with a ceramic on ultra-high-molecular-weight polyethylene articulation ( CP ) .  Fifty-six hips in 55 patients with mean age 42.2 ( range , 19 - 56 ) each received uncemented components , a 28-mm alumina head with r and omization of acetabular liner .  Mean St Michael 's outcome score for each group with up to 10 years follow-up ( median , 8 years ; range , 1 - 10 ) was 22.8 and 22.9 , respectively ( P = .819 ) . Wear was identified in all but 1 CP replacement , but only 12 of the 23 CC . Mean wear in the CP group was 0.11 mm/y and 0.02 mm/yr in the CC group ( P < .001 ) . Other than significantly greater wear in the polyethylene group , there was no significant difference in midterm outcome between the 2 groups
The present evidence indicated the similar performance in survivorship among CoC , CoPc , CoPxl and MoPxl bearing implants , and that all likely have superiority compared with the MoM and MoPc bearing implants in THA procedures .
PURPOSE Although many  total hip bearing implants  are widely used all over the world , simultaneous comparisons across the numerous available bearing surfaces are rare .
The purpose of this study was to compare the survivorship of total hip arthroplasty ( THA ) with six available bearing implants .