De Pieri, E, Lunn, DE orcid.org/0000-0002-3158-0496, Chapman, GJ orcid.org/0000-0003-3983-6641 et al. (3 more authors) (2019) Patient Characteristics Affect Hip Contact Forces during Gait. Osteoarthritis and Cartilage, 27 (6). pp. 895-905. ISSN 1063-4584
Abstract
Objective: To examine hip contact force (HCF), calculated through multibody modelling, in a large total hip replacement (THR) cohort stratified by patient characteristics such as BMI, age and function.
Method: 132 THR patients undertook one motion capture session of gait analysis at a self-selected walking speed. HCFs were then calculated using the AnyBody Modelling System. Patients were stratified into three BMI groups, five age groups, and finally three functional groups determined by their self-selected gait speed. Independent 1-dimensional linear regression analyses were performed to separately evaluate the influence of age, BMI and functionality on HCF, by means of statistical parametric mapping (SPM).
Results: The mean predicted HCF were comparable to HCFs measured with an instrumented prosthesis reported in the literature. The regression analyses revealed a statistically significant positive linear correlation between BMI and HCF, indicating that obese patients are more likely to experience higher HCF during most of the stance phase, while a statistically significant linear correlation with age was found only during the late swing-phase. Patients with higher functional ability exhibited significantly increased peak contact forces, while patients with lower functional ability displayed a pathological flattening of the typical double hump force profile.
Conclusion: HCFs experienced at the bearing surface are highly dependent on patient characteristics. BMI and functional ability were determined to have the biggest influence on contact force. Current preclinical testing standards do not reflect this.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2019 Osteoarthritis Research Society International. Published by Elsevier Ltd. This is an author produced version of a paper published in Osteoarthritis and Cartilage. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Total hip replacement; hip contact force; stratification; biomechanics; gait |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Medicine and Health (Leeds) > School of Medicine (Leeds) > Institute of Rheumatology & Musculoskeletal Medicine (LIRMM) (Leeds) > Clinical Biomechanic & Physical Med (LIRMM) (Leeds) |
Funding Information: | Funder Grant number EU - European Union 310477 NIHR National Inst Health Research LMBRC |
Depositing User: | Symplectic Publications |
Date Deposited: | 05 Feb 2019 11:32 |
Last Modified: | 16 Dec 2024 14:54 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.joca.2019.01.016 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:141845 |