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Experimental validation of a new biphasic model of the contact mechanics of the porcine hip

Hip models that incorporate the biphasic behaviour of articular cartilage can improve understanding of the joint function, pathology of joint degeneration and effect of potential interventions. The aim of this study was to develop a specimen-specific biphasic finite element model of a porcine acetab...

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Autores principales: Li, Junyan, Wang, Qianqian, Jin, Zhongmin, Williams, Sophie, Fisher, John, Wilcox, Ruth K
Formato: Online Artículo Texto
Lenguaje:English
Publicado: SAGE Publications 2014
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4361351/
https://www.ncbi.nlm.nih.gov/pubmed/24878736
http://dx.doi.org/10.1177/0954411914537618
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author Li, Junyan
Wang, Qianqian
Jin, Zhongmin
Williams, Sophie
Fisher, John
Wilcox, Ruth K
author_facet Li, Junyan
Wang, Qianqian
Jin, Zhongmin
Williams, Sophie
Fisher, John
Wilcox, Ruth K
author_sort Li, Junyan
collection PubMed
description Hip models that incorporate the biphasic behaviour of articular cartilage can improve understanding of the joint function, pathology of joint degeneration and effect of potential interventions. The aim of this study was to develop a specimen-specific biphasic finite element model of a porcine acetabulum incorporating a biphasic representation of the articular cartilage and to validate the model predictions against direct experimental measurements of the contact area in the same specimen. Additionally, the effect of using a different tension–compression behaviour for the solid phase of the articular cartilage was investigated. The model represented different radial clearances and load magnitudes. The comparison of the finite element predictions and the experimental measurement showed good agreement in the location, size and shape of the contact area, and a similar trend in the relationship between contact area and load was observed. There was, however, a deviation of over 30% in the magnitude of the contact area, which might be due to experimental limitations or to simplifications in the material constitutive relationships used. In comparison with the isotropic solid phase model, the tension–compression solid phase model had better agreement with the experimental observations. The findings provide some confidence that the new biphasic methodology for modelling the cartilage is able to predict the contact mechanics of the hip joint. The validation provides a foundation for future subject-specific studies of the human hip using a biphasic cartilage model.
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spelling pubmed-43613512015-04-10 Experimental validation of a new biphasic model of the contact mechanics of the porcine hip Li, Junyan Wang, Qianqian Jin, Zhongmin Williams, Sophie Fisher, John Wilcox, Ruth K Proc Inst Mech Eng H Original Articles Hip models that incorporate the biphasic behaviour of articular cartilage can improve understanding of the joint function, pathology of joint degeneration and effect of potential interventions. The aim of this study was to develop a specimen-specific biphasic finite element model of a porcine acetabulum incorporating a biphasic representation of the articular cartilage and to validate the model predictions against direct experimental measurements of the contact area in the same specimen. Additionally, the effect of using a different tension–compression behaviour for the solid phase of the articular cartilage was investigated. The model represented different radial clearances and load magnitudes. The comparison of the finite element predictions and the experimental measurement showed good agreement in the location, size and shape of the contact area, and a similar trend in the relationship between contact area and load was observed. There was, however, a deviation of over 30% in the magnitude of the contact area, which might be due to experimental limitations or to simplifications in the material constitutive relationships used. In comparison with the isotropic solid phase model, the tension–compression solid phase model had better agreement with the experimental observations. The findings provide some confidence that the new biphasic methodology for modelling the cartilage is able to predict the contact mechanics of the hip joint. The validation provides a foundation for future subject-specific studies of the human hip using a biphasic cartilage model. SAGE Publications 2014-06 /pmc/articles/PMC4361351/ /pubmed/24878736 http://dx.doi.org/10.1177/0954411914537618 Text en © IMechE 2014 http://creativecommons.org/licenses/by/3.0/ This article is distributed under the terms of the Creative Commons Attribution 3.0 License (http://www.creativecommons.org/licenses/by/3.0/) which permits any use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access page (http://www.uk.sagepub.com/aboutus/openaccess.htm).
spellingShingle Original Articles
Li, Junyan
Wang, Qianqian
Jin, Zhongmin
Williams, Sophie
Fisher, John
Wilcox, Ruth K
Experimental validation of a new biphasic model of the contact mechanics of the porcine hip
title Experimental validation of a new biphasic model of the contact mechanics of the porcine hip
title_full Experimental validation of a new biphasic model of the contact mechanics of the porcine hip
title_fullStr Experimental validation of a new biphasic model of the contact mechanics of the porcine hip
title_full_unstemmed Experimental validation of a new biphasic model of the contact mechanics of the porcine hip
title_short Experimental validation of a new biphasic model of the contact mechanics of the porcine hip
title_sort experimental validation of a new biphasic model of the contact mechanics of the porcine hip
topic Original Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4361351/
https://www.ncbi.nlm.nih.gov/pubmed/24878736
http://dx.doi.org/10.1177/0954411914537618
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