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Friction of total hip replacements with different bearings and loading conditions
Author(s) -
Brockett Claire,
Williams Sophie,
Jin Zhongmin,
Isaac Graham,
Fisher John
Publication year - 2007
Publication title -
journal of biomedical materials research part b: applied biomaterials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.665
H-Index - 108
eISSN - 1552-4981
pISSN - 1552-4973
DOI - 10.1002/jbm.b.30691
Subject(s) - materials science , lubricant , ceramic , bearing (navigation) , composite material , total hip replacement , tribology , bearing surface , lubrication , surgery , cartography , geography , medicine
Metal‐on‐ultra‐high molecular weight polyethylene (UHMWPE) total hip replacements have been the most popular and clinically successful implants to date. However, it is well documented that the wear debris from these prostheses contributes to osteolysis and ultimate failure of the prosthesis, hence alternative materials have been sought. A range of 28 mm diameter bearings were investigated using a hip friction simulator, including conventional material combinations such as metal‐on‐UHWMPE, ceramic‐on‐ceramic (CoC), and metal‐on‐metal (MoM), as well as novel ceramic‐on‐metal (CoM) pairings. Studies were performed under different swing‐phase load and lubricant conditions. The friction factors were lowest in the ceramic bearings, with the CoC bearing having the lowest friction factor in all conditions. CoM bearings also had low friction factors compared with MoM, and the trends were similar to CoC bearings for all test conditions. Increasing swing phase load was shown to cause an increase in friction factor in all tests. Increased serum concentration resulted in increased friction factor in all material combinations, except MoM, where increased serum concentration produced a significant reduction in friction factor. © 2006 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 2006