Cowie, RM orcid.org/0000-0003-3903-5916, Pallem, NM, Briscoe, A et al. (1 more author) (2020) Third body wear of UHMWPE-on-PEEK-OPTIMA. Materials, 13 (6). 1264. ISSN 1996-1944
Abstract
PEEK-OPTIMA™ is being considered as an alternative to cobalt chrome (CoCr) in the femoral component of total knee replacements. To date, investigations of ultra-high molecular weight polyethylene (UHMWPE)-on-PEEK have shown an equivalent wear rate to conventional implant materials under standard conditions. In this study, the third body wear performance of UHMWPE-on-PEEK was directly compared to UHMWPE-on-CoCr in a series of pin-on-plate studies using two approaches for third body damage. Damage simulation with particles of bone cement showed a significant (p < 0.001), four-fold increase in the mean surface roughness of PEEK plates compared to CoCr. However, wear simulation against the damaged plates showed no significant difference in the wear of UHMWPE pins against the different materials (p = 0.59), and a polishing effect by the pin against the PEEK plates was observed. Scratching PEEK and CoCr counterfaces with a diamond stylus to create scratches representative of severe third body damage (4 µm lip height) resulted in a significantly higher (p = 0.01) wear of UHMWPE against CoCr compared to PEEK and again, against PEEK plates, polishing by the UHMWPE pin led to a reduction in scratch lip height. This study shows that in terms of its wear performance under third body wear/damage conditions, UHMWPE-on-PEEK differs from conventional knee replacement materials.
Metadata
Item Type: | Article |
---|---|
Authors/Creators: |
|
Copyright, Publisher and Additional Information: | © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
Keywords: | biomaterials; arthroplasty; orthopaedic tribology; experimental simulation; total knee replacement; PEEK-OPTIMA™; UHMWPE; third body wear |
Dates: |
|
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 EPSRC (Engineering and Physical Sciences Research Council) EP/J017620/1 Invibio Ltd N/A Invibio Ltd Not Known EPSRC (Engineering and Physical Sciences Research Council) EP/K029592/1 |
Depositing User: | Symplectic Publications |
Date Deposited: | 12 Mar 2020 11:50 |
Last Modified: | 25 Jun 2023 22:11 |
Status: | Published |
Publisher: | MDPI |
Identification Number: | 10.3390/ma13061264 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:158308 |