The Influence of Edge Loading on the Wear of Fourth Generation Ceramic-on-Ceramic Bearing in Total Hip Replacements

نویسنده

  • M. Al-Hajjar
چکیده

INTRODUCTION Ceramic-on-ceramic (CoC) bearings in total hip replacements (THR) have become of great interest due to the substantial improvements in the manufacturing techniques and material properties [1]. They have substantially lower wear rates than metal or ceramic on polyethylene bearings [2] and wear particles were found to be less biologically active than particles produced by other types of bearings [3]. Clinical studies on retrievals have shown a stripe-like wear scar on the femoral head with a corresponding wear area on the acetabular cup [4]. Clinically, stripe wear has been associated with edge loading and steep inclination angle of the acetabular cup [5]. The aim of this study was to assess the wear of fourth generation alumina matrix composite bearing couples under steep cup inclination angles and microseparation (edge loading) conditions and compare their performance to earlier generation CoC bearing couples.

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تاریخ انتشار 2010