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 .
Highly Crosslinked Polyethylene Reduces Wear in Total Hip Arthroplasty at 5 Years
Background Although hip arthroplasty reliably relieves pain and improves function , problems have arisen with wear and osteolysis .  Highly crosslinked polyethylene has been developed to address this problem although at present there is limited clinical evidence it does so longer term . Questions / purpose sWe compared the in vivo wear of st and ard versus highly crosslinked polyethylene ( HXLP ) in primary total hip arthroplasty at a minimum of 5-year followup . Methods We enrolled 122 patients in a prospect i ve , double-blinded , r and omized trial and followed them annually to assess their progress . Annual radiographs were analyzed using previously vali date d edge detection software to assess for two-dimensional , three-dimensional , and volumetric wear . The mean follow up was 5.5 years ( range , 4.1 to 7 years ) . Results The two-dimensional wear measurements for HXLP showed lower wear compared to the conventional group ( 0.05 mm/year versus 0.26 mm/year , respectively ) . Three-dimensional and volumetric wear were similarly lower in the HXLP group . Conclusions Highly crosslinked polyethylene undergoes substantially less wear than conventional polyethylene at medium term . The effect of hip arthroplasty longevity will need to be assessed with longer-term studies , but this may lead to a decreased need for revision as a result of less wear and osteolysis . Level of Evidence Level I , therapeutic study . See Guidelines for Authors for a complete description of levels of evidence
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 .