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 .
A comparison of the penetration rate of two polyethylene acetabular liners of different levels of cross-linking. A prospective randomised trial.
We carried out a prospect i ve r and omised study design ed to compare the penetration rate of acetabular polyethylene inserts of identical design but different levels of cross-linking at a minimum of four years follow-up . A total of 102 patients ( 102 hips ) were r and omised to receive either highly cross-linked Durasul , or contemporary Sulene polyethylene inserts at total hip replacement .  A single blinded observer used the Martell system to assess penetration of the femoral head . At a mean follow-up of 4.9 years ( 4.2 to 6.1 ) the mean femoral head penetration rate was 0.025 mm/year ( SD 0.128 ) in the Durasul group compared with 0.106 mm/year ( SD 0.109 ) in the Sulene group ( Mann-Whitney test , p = 0.0027 ) . The mean volumetric penetration rate was 29.24 mm(3)/year ( SD 44.08 ) in the Durasul group compared with 53.32 mm(3)/year ( SD 48.68 ) in the Sulene group . The yearly volumetric penetration rate was 55 % lower in the Durasul group ( Mann-Whitney test , p = 0.0058 ) . Longer term results are needed to investigate whether less osteolysis will occur
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 .