Smyth, A orcid.org/0000-0002-1835-9359, Fisher, J orcid.org/0000-0003-3833-3700, Suner, S et al. (1 more author) (2017) Influence of Kinematics on the Wear of a Total Ankle Replacement. Journal of Biomechanics, 53. pp. 105-110. ISSN 0021-9290
Abstract
Total ankle replacement (TAR) is an alternative to fusion, replacing the degenerated joint with a mechanical motion-preserving alternative. Minimal pre-clinical testing has been reported to date and existing wear testing standards lack definition. Ankle gait is complex, therefore the aim of this study was to investigate the effect on wear of a range of different ankle gait kinematic inputs. Five Zenith (Corin Group) TARs were tested in a modified knee simulator for twelve million cycles (Mc). Different combinations of IR rotation and AP displacement were applied every 2Mc to understand the effects of the individual kinematics. Wear was assessed gravimetrically every Mc and surface profilometry undertaken after each condition. With the initial unidirectional input with no AP displacement the wear rate measured 1.2±0.6 mm3/Mc. The addition of 11° rotation and 9 mm of AP displacement caused a statistically significant increase in the wear rate to 25.8±3.1 mm3/Mc. These inputs seen a significant decrease in the surface roughness at the tibial articulation. Following polishing three displacement values were tested; 0, 4 and 9 mm with no significant difference in wear rate ranging 11.8–15.2 mm3/Mc. TAR wear rates were shown to be highly dependent on the addition of internal/external rotation within the gait profile with multidirectional kinematics proving vital in the accurate wear testing of TARs. Prior to surface polishing wear rates were significantly higher but once in a steady state the AP displacement had no significant effect on the wear.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2017 The Authors. Published by Elsevier Ltd. This is an open access article under the terms of the Creative Commons Attribution License (CC-BY). |
Keywords: | total ankle replacement; wear; gait; biotribology; 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 Leeds Teaching Hospitals NHS Trust Not Known National Inst for Health Research (NIHR) N/A EPSRC EP/N00941X/1 |
Depositing User: | Symplectic Publications |
Date Deposited: | 05 Jan 2017 11:30 |
Last Modified: | 13 Dec 2024 15:53 |
Published Version: | https://doi.org/10.1016/j.jbiomech.2017.01.001 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.jbiomech.2017.01.001 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:110105 |