Journal article
Hemiarthroplasty of hip joint: An experimental validation using porcine acetabulum
Journal of biomechanics, Vol.44(8), pp.1536-1542
05/17/2011
DOI: 10.1016/j.jbiomech.2011.02.140
PMID: 21439570
Abstract
Biphasic properties of articular cartilage allow it to be an excellent bearing material and have been studied through several simplified experiments as well as finite element modelling. However, three-dimensional biphasic finite element (FE) models of the whole joint are rare. The current study was carried out to experimentally validate FE methodology for modelling hemiarthroplasty. Material properties such as equilibrium elastic modulus and permeability of porcine acetabular cartilage were initially derived by curve-fitting an experimental deformation curve with that obtained using FE. These properties were then used in the hemiarthroplasty hip joint modelling. Each porcine acetabular cup was loaded with 400N using a 34mm diameter CoCr femoral head. A specimen-specific FE model of each acetabular cup was created using μCT and a series of software processes. Each model was analysed under conditions similar to those tested experimentally. Contact stresses and contact areas predicted by the model, immediately after loading, were then compared with the corresponding experimentally measured values. Very high peak contact stresses (maximum experimental: 14.09MPa) were recorded. A maximum difference of 12.42% was found in peak contact stresses. The corresponding error for contact area was 20.69%. Due to a fairly good agreement in predicted and measured values of contact stresses and contact areas, the integrated methodology developed in this study can be used as a basis for future work. In addition, FE predicted total fluid load support was around 80% immediately after loading. This was lower than that observed in conforming contact problems involving biphasic cartilage and was due to a smaller local contact area and variable clearance making fluid exudation easier.
Details
- Title: Subtitle
- Hemiarthroplasty of hip joint: An experimental validation using porcine acetabulum
- Creators
- Sainath Shrikant Pawaskar - Institute of Medical and Biological Engineering, School of Mechanical Engineering, University of Leeds, Leeds LS2 9JT, United KingdomNicole M Grosland - Department of Biomedical Engineering, The University of Iowa, Iowa City, IA 52242, United StatesEileen Ingham - Institute of Medical and Biological Engineering, School of Mechanical Engineering, University of Leeds, Leeds LS2 9JT, United KingdomJohn Fisher - Institute of Medical and Biological Engineering, School of Mechanical Engineering, University of Leeds, Leeds LS2 9JT, United KingdomZhongmin Jin - Institute of Medical and Biological Engineering, School of Mechanical Engineering, University of Leeds, Leeds LS2 9JT, United Kingdom
- Resource Type
- Journal article
- Publication Details
- Journal of biomechanics, Vol.44(8), pp.1536-1542
- DOI
- 10.1016/j.jbiomech.2011.02.140
- PMID
- 21439570
- NLM abbreviation
- J Biomech
- ISSN
- 0021-9290
- eISSN
- 1873-2380
- Publisher
- Elsevier Ltd
- Grant note
- name: Overseas Research Students Awards Scheme; name: National Institute for Health Research (NIHR) as a part of collaboration with the Leeds Musculoskeletal Biomedical Research Unit (LMBRU), by EPSRC, by the Leeds Centre of Excellence in Medical Engineering funded by the Wellcome Trust and EPSRC, award: WT088908/z/09/z
- Language
- English
- Date published
- 05/17/2011
- Academic Unit
- Roy J. Carver Department of Biomedical Engineering; Orthopedics and Rehabilitation; Injury Prevention Research Center
- Record Identifier
- 9984040323702771
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