Tribology of Hip Prostheses, Wear Performance and Reliability, Effect of Materials and Head Size
Wear and adverse reactions to wear particles remain a concern, particularly with young and active patients with long life expectancies. There is considerable interest in the clinical use of improved bearing materials such as cross-linked polyethylene, metal on metal, ceramic on ceramic and ceramic on metal. In addition to reducing wear, there is also clinical interest in using larger head sizes to improve stability and range of motion. However, in polyethylene bearings, a larger head size can lead to increased wear. Most previous research work has studied the wear performance of bearings under a standard set of walking conditions with components correctly positioned. Indeed, with improvements in bearing technology, the wear under standard walking conditions has reduced to low levels, and this has encouraged the use of diameter larger heads. However, under adverse conditions the wear of some bearings can increase.
KeywordsWear Rate Adverse Condition Head Size Wear Performance Conventional Polyethylene
JF is an NIHR senior investigator. His research is funded by NIHR LMBRU Leeds Musculoskeletal Biomedical Research Unit, through Centre of Excellence in Medical Engineering funded by Wellcome Trust and EPSRC WT 088908/z/09/z, through the Innovation and Knowledge Centre in Regenerative Therapies and Devices funded by EPSRC, BBSRC and TSB and through Orthopaedic Research UK, by the NIH and by ERC.
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