Cowie, RM orcid.org/0000-0003-3903-5916, Adam, B, Fisher, J et al. (1 more author) (2019) Wear and Friction of UHMWPE-on-PEEK OPTIMA™. Journal of the Mechanical Behavior of Biomedical Materials, 89. pp. 65-71. ISSN 1751-6161
Abstract
PEEK-OPTIMA™ is being considered as an alternative bearing material to cobalt chrome in the femoral component of total knee replacement to provide a metal-free implant. The aim of this study was to investigate the influence of lubricant temperature (standard rig running and elevated temperature (~36 °C)) on the wear of a UHMWPE-on-PEEK OPTIMA™ bearing couple using different lubricant protein concentrations (0, 2, 5, 25 and 90% bovine serum) in a simple geometry pin-on-plate configuration. Friction was also investigated under a single temperature condition for different lubricant protein concentrations. The studies were repeated for UHMWPE-on-cobalt chrome in order to compare relationships with temperature (wear only) and lubricant protein concentration (wear and friction).
In low lubricant protein concentrations (≤ 5%) there was no influence of temperature on the wear factors of UHMWPE-on-PEEK. With 25% bovine serum, the wear factor of UHMWPE-on-PEEK reduced by half at elevated temperature. When tested in high protein concentration (90% serum), there was no influence of temperature on the wear factor of UHMWPE-on-PEEK. These temperature dependencies were not the same for UHMWPE-on-cobalt chrome.
For both material combinations, there was a trend of decreasing friction with increasing protein concentration once protein was present in the lubricant.
This study has shown the importance of the selection of appropriate test conditions when investigating the wear and friction of different materials, in order to minimise test artefacts such as polymer transfer, and protein precipitation and deposition.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | This is an author produced version of a paper published in the Journal of the Mechanical Behavior of Biomedical Materials. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Arthroplasty; PEEK-OPTIMA™; UHMWPE; Wear; Friction; TKR |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Mechanical Engineering (Leeds) > Institute of Medical and Biological Engineering (iMBE) (Leeds) |
Funding Information: | Funder Grant number Wellcome Trust 088908/Z/09/Z Invibio Ltd N/A EPSRC EP/K029592/1 EPSRC EP/J017620/1 |
Depositing User: | Symplectic Publications |
Date Deposited: | 20 Sep 2018 10:21 |
Last Modified: | 17 Sep 2019 00:38 |
Status: | Published |
Publisher: | Elsevier BV |
Identification Number: | 10.1016/j.jmbbm.2018.09.021 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:135974 |