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Lubricants 2015, 3(2), 459-474; doi:10.3390/lubricants3020459

Evaluation of Two Total Hip Bearing Materials for Resistance to Wear Using a Hip Simulator

Department of Biomedical Materials Science, University of Mississippi Medical Center, Jackson, MS 39216, USA
Academic Editors: Amir Kamali and J. Philippe Kretzer
Received: 11 February 2015 / Accepted: 27 May 2015 / Published: 3 June 2015
(This article belongs to the Special Issue Tribological Performance of Artificial Joints)
View Full-Text   |   Download PDF [1348 KB, uploaded 3 June 2015]   |  

Abstract

Electron beam crosslinked ultra high molecular weight polyethylene (UHMWPE) 32 mm cups with cobalt alloy femoral heads were compared with gamma-irradiation sterilized 26 mm cups and zirconia ceramic heads in a hip wear simulator. The testing was performed for a total of ten million cycles with frequent stops for cleaning and measurement of mass losses due to wear. The results showed that the ceramic on UHMWPE bearing design exhibited higher early wear than the metal on highly crosslinked samples. Once a steady state wear rate was reached, the wear rates of the two types of hip bearing systems were similar with the ceramic on UHMPWE samples continuing to show a slightly higher rate of wear than the highly crosslinked samples. The wear rates of each of the tested systems appear to be consistent with the expectations for low rates of wear in improved hip replacement systems. View Full-Text
Keywords: UHMWPE; wear simulation; alternative bearings; hip prosthesis UHMWPE; wear simulation; alternative bearings; hip prosthesis
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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St. John, K.R. Evaluation of Two Total Hip Bearing Materials for Resistance to Wear Using a Hip Simulator. Lubricants 2015, 3, 459-474.

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