Evaluation of Two Total Hip Bearing Materials for Resistance to Wear Using a Hip Simulator
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 freq...
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Online Access: | http://www.mdpi.com/2075-4442/3/2/459 |
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doaj-763ed4d68ecf4ede88404ce91aa2ef192020-11-24T23:28:24ZengMDPI AGLubricants2075-44422015-06-013245947410.3390/lubricants3020459lubricants3020459Evaluation of Two Total Hip Bearing Materials for Resistance to Wear Using a Hip SimulatorKenneth R. St. John0Department of Biomedical Materials Science, University of Mississippi Medical Center, Jackson, MS 39216, USAElectron 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.http://www.mdpi.com/2075-4442/3/2/459UHMWPEwear simulationalternative bearingship prosthesis |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Kenneth R. St. John |
spellingShingle |
Kenneth R. St. John Evaluation of Two Total Hip Bearing Materials for Resistance to Wear Using a Hip Simulator Lubricants UHMWPE wear simulation alternative bearings hip prosthesis |
author_facet |
Kenneth R. St. John |
author_sort |
Kenneth R. St. John |
title |
Evaluation of Two Total Hip Bearing Materials for Resistance to Wear Using a Hip Simulator |
title_short |
Evaluation of Two Total Hip Bearing Materials for Resistance to Wear Using a Hip Simulator |
title_full |
Evaluation of Two Total Hip Bearing Materials for Resistance to Wear Using a Hip Simulator |
title_fullStr |
Evaluation of Two Total Hip Bearing Materials for Resistance to Wear Using a Hip Simulator |
title_full_unstemmed |
Evaluation of Two Total Hip Bearing Materials for Resistance to Wear Using a Hip Simulator |
title_sort |
evaluation of two total hip bearing materials for resistance to wear using a hip simulator |
publisher |
MDPI AG |
series |
Lubricants |
issn |
2075-4442 |
publishDate |
2015-06-01 |
description |
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. |
topic |
UHMWPE wear simulation alternative bearings hip prosthesis |
url |
http://www.mdpi.com/2075-4442/3/2/459 |
work_keys_str_mv |
AT kennethrstjohn evaluationoftwototalhipbearingmaterialsforresistancetowearusingahipsimulator |
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