Brockett, C.L., Harper, P., Williams, S., Isaac, G.H., Dwyer-Joyce, R.S., Jin, Z. and Fisher, J. (2008) The influence of clearance on friction, lubrication and squeaking in large diameter metal-on-metal hip replacements. Journal of Materials Science: Materials in Medicine, 19 (4). pp. 1575-1579. ISSN 09574530Full text available as:
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Large diameter metal-on-metal bearings (MOM) are becoming increasingly popular, addressing the needs of young and more active patients. Clinical data has shown excellent short-to-mid-term results, though incidences of transient squeaking have been noted between implantation and up to 2 years post-operative. Geometric design features, such as clearance, have been significant in influencing the performance of the bearings. Sets of MOM bearings with different clearances were investigated in this study using a hip friction simulator to examine the influence of clearance on friction, lubrication and squeaking. The friction factor was found to be highest in the largest clearance bearings under all test conditions. The incidence of squeaking was also highest in the large clearance bearings, with all bearings in this group squeaking throughout the study. A very low incidence of squeaking was observed in the other two clearance groups. The measured lubricating film was found to be lowest in the large clearance bearings. This study suggests that increasing the bearing clearance results in reduced lubricant film thickness, increased friction and an increased incidence of squeaking.
|Copyright, Publisher and Additional Information:||Copyright (c) 2008 Springer Science + Business Media. This is an author produced version of a paper published in ' Journal of Materials Science: Materials in Medicine '. Uploaded in accordance with the publisher's self-archiving policy.|
|Keywords:||Film thickness Friction Implants (surgical) Clearance bearings Hip friction Lubricating film Metal-on-metal bearings (MOM) Biomedical engineering lubricating agent metal clearance conference paper geometry lubrication priority journal total hip prosthesis weight bearing Arthroplasty, Replacement, Hip Biocompatible Materials Equipment Design Equipment Failure Analysis Hip Joint Hip Prosthesis Humans Materials Testing Metals Prosthesis Design Rheology Surface Properties Time Factors|
|Academic Units:||The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Mechanical Engineering (Sheffield)
The University of Leeds > Faculty of Engineering (Leeds) > School of Mechanical Engineering (Leeds) > Institute of Medical and Biological Engineering (iMBE)(Leeds)
|Depositing User:||Mr Christopher Hardwick|
|Date Deposited:||18 Aug 2009 14:45|
|Last Modified:||08 Feb 2013 17:06|
|Publisher:||Springer Science + Business Media|
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