Cowie, RM orcid.org/0000-0003-3903-5916, Briscoe, A, Fisher, J orcid.org/0000-0003-3833-3700 et al. (1 more author) (2016) PEEK-OPTIMA as an alternative to cobalt chrome in the femoral component of total knee replacement: A preliminary study. Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine, 230 (11). pp. 1008-1015. ISSN 0954-4119
Abstract
PEEK-OPTIMA™ (Invibio Ltd, UK) has been considered as an alternative joint arthroplasty bearing material due to its favourable mechanical properties and the biocompatibility of its wear debris. In this study, the potential to use injection moulded PEEK-OPTIMA™ as an alternative to cobalt chrome in the femoral component of a total knee replacement was investigated in terms of its wear performance. Experimental wear simulation of three cobalt chrome and three PEEK-OPTIMA™ femoral components articulating against all-polyethylene tibial components was carried out under two kinematic conditions: 3 million cycles under intermediate kinematics (maximum anterior-posterior displacement of 5 mm) followed by 3 million cycles under high kinematic conditions (anterior-posterior displacement 10 mm). The wear of the GUR1020 ultra-high-molecular-weight polyethylene tibial components was assessed by gravimetric analysis; for both material combinations under each kinematic condition, the mean wear rates were low, that is, below 5 mm³/million cycles. Specifically, under intermediate kinematic conditions, the wear rate of the ultra-high-molecular-weight polyethylene tibial components was 0.96 ± 2.26 mm³/million cycles and 2.44 ± 0.78 mm³/million cycle against cobalt chrome and PEEK-OPTIMA™ implants, respectively (p = 0.06); under high kinematic conditions, the wear rates were 2.23 ± 1.85 mm³/million cycles and 4.44 ± 2.35 mm³/million cycles, respectively (p = 0.03). Following wear simulation, scratches were apparent on the surface of the PEEK-OPTIMA™ femoral components. The surface topography of the femoral components was assessed using contacting profilometry and showed a statistically significant increase in measured surface roughness of the PEEK-OPTIMA™ femoral components compared to the cobalt chrome implants. However, this did not appear to influence the wear rate, which remained linear over the duration of the study. These preliminary findings showed that PEEK-OPTIMA™ gives promise as an alternative bearing material to cobalt chrome alloy in the femoral component of a total knee replacement with respect to wear performance.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2016, IMechE. This is an author produced version of a paper published in Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Joint Simulators; Knee Prostheses; Orthopaedic tribology; Wear Analysis/Testing; Biomaterials; PEEK-OPTIMA™; UHMWPE; ultra-high-molecular-weight polyethylene |
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 Wellcome Trust 088908/Z/09/Z Invibio Ltd N/A EPSRC EP/J017620/1 EPSRC EP/J017620/1 |
Depositing User: | Symplectic Publications |
Date Deposited: | 08 Sep 2016 14:41 |
Last Modified: | 01 Jul 2017 16:43 |
Published Version: | https://doi.org/10.1177/0954411916667410 |
Status: | Published |
Publisher: | SAGE Publications |
Identification Number: | 10.1177/0954411916667410 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:104453 |