O'Dwyer Lancaster-Jones, O orcid.org/0000-0002-8434-7268, Williams, S orcid.org/0000-0002-6963-965X, Jennings, LM orcid.org/0000-0003-1446-4511 et al. (4 more authors) (2018) An in vitro simulation model to assess the severity of edge loading and wear, due to variations in component positioning in hip joint replacements. Journal of Biomedical Materials Research - Part B Applied Biomaterials, 106 (5). pp. 1897-1906. ISSN 1552-4973
Abstract
The aim of this study was to develop a preclinical in vitro method to predict the occurrence and severity of edge loading condition associated with the dynamic separation of the centres of the head and cup (in the absence of impingement) for variations in surgical positioning of the cup. Specifically, this study investigated the effect of both the variations in the medial–lateral translational mismatch between the centres of the femoral head and acetabular cup and the variations in the cup inclination angles on the occurrence and magnitude of the dynamic separation, the severity of edge loading, and the wear rate of ceramic‐on‐ceramic hip replacement bearings in a multi‐station hip joint simulator during a walking gait cycle. An increased mismatch between the centres of rotation of the femoral head and acetabular cup resulted in an increased level of dynamic separation and an increase in the severity of edge loading condition which led to increased wear rate in ceramic‐on‐ceramic bearings. Additionally for a given translational mismatch, an increase in the cup inclination angle gave rise to increased dynamic separation, worst edge loading conditions, and increased wear. To reduce the occurrence and severity of edge loading, the relative positions (the mismatch) of the centres of rotation of the head and the cup should be considered alongside the rotational position of the acetabular cup. This study has considered the combination of mechanical and tribological factors for the first time in the medial–lateral axis only, involving one rotational angle (inclination) and one translational mismatch.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2017 The Authors. Journal of Biomedical Materials Research Part B: Applied Biomaterials Published by Wiley Periodicals, Inc. This is an open access article under the terms of the Creative Commons Attribution‐NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes. To view a copy of this license, visit https://creativecommons.org/licenses/by-nc/4.0/ |
Keywords: | hip replacement; edge loading; surgical positioning; wear; ceramic-on-ceramic |
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 Depuy International Ltd UNSPECIFIED EPSRC EP/K029592/1 Wellcome Trust 088908/Z/09/Z |
Depositing User: | Symplectic Publications |
Date Deposited: | 15 Sep 2017 10:49 |
Last Modified: | 16 Dec 2024 10:36 |
Status: | Published |
Publisher: | Wiley |
Identification Number: | 10.1002/jbm.b.33991 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:121225 |
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