Finite element modelling of glenohumeral kinematics following total shoulder arthroplasty
Finite element modelling of glenohumeral kinematics following total shoulder arthroplasty
Due to the shallowness of the glenohumeral joint, a challenging but essential requirement of a glenohumeral prosthesis is theprevention of joint dislocation. Weak glenoid bone stock and frequent dysfunction of the rotator cuff, both of which are common with rheumatoid arthritis, make it particularly difficult to achieve this design goal. Although a variety of prosthetic designs are commercially available only a few experimental studies have investigated the kinematics and dislocation characteristics of design variations. Analytical or numerical methods, which are predictive and more cost-effective, are, apart from simple rigid-body analyses, non-existent. The current investigation presents the results of a finite element analysis of the kinematics of a total shoulder joint validated using recently published experimental data for the same prostheses. The finite element model determined the loading required to dislocate the humeral head, and the corresponding translations, to within 4% of the experimental data. The finite element method compared dramatically better to the experimental data (mean difference = 2.9%) than did rigid-body predictions (mean difference = 37%).The goal of this study was to develop an accurate method that in future studies can be used for further investigations of the effect of design parameters on dislocation, particularly in the case of a dysfunctional rotator cuff. Inherently, the method also evaluates the glenoid fixation stresses in the relatively weak glenoid bone stock. Hence, design characteristics can be simultaneously optimised against dislocation as well as glenoid loosening.
2476-2483
Hopkins, A.R.
eaa6238b-b3fe-4c42-aeda-124d611900cd
Hansen, U.N.
9221b9d2-aa1d-4597-a4ec-4275773653bd
Amis, A.A.
b956dafd-6b8a-4e55-8558-e7ca00f4d607
Taylor, M.
bdd7186d-4fda-4a39-bddb-9fcbbe25fcaa
Gronaud, N.
a7fa3f36-8df9-4567-8a3e-3664db52d27a
Anglin, C.
30599f3d-d797-43b2-a541-8c630f7e4cb6
2006
Hopkins, A.R.
eaa6238b-b3fe-4c42-aeda-124d611900cd
Hansen, U.N.
9221b9d2-aa1d-4597-a4ec-4275773653bd
Amis, A.A.
b956dafd-6b8a-4e55-8558-e7ca00f4d607
Taylor, M.
bdd7186d-4fda-4a39-bddb-9fcbbe25fcaa
Gronaud, N.
a7fa3f36-8df9-4567-8a3e-3664db52d27a
Anglin, C.
30599f3d-d797-43b2-a541-8c630f7e4cb6
Hopkins, A.R., Hansen, U.N., Amis, A.A., Taylor, M., Gronaud, N. and Anglin, C.
(2006)
Finite element modelling of glenohumeral kinematics following total shoulder arthroplasty.
Journal of Biomechanics, 39 (13), .
(doi:10.1016/j.jbiomech.2005.07.031).
Abstract
Due to the shallowness of the glenohumeral joint, a challenging but essential requirement of a glenohumeral prosthesis is theprevention of joint dislocation. Weak glenoid bone stock and frequent dysfunction of the rotator cuff, both of which are common with rheumatoid arthritis, make it particularly difficult to achieve this design goal. Although a variety of prosthetic designs are commercially available only a few experimental studies have investigated the kinematics and dislocation characteristics of design variations. Analytical or numerical methods, which are predictive and more cost-effective, are, apart from simple rigid-body analyses, non-existent. The current investigation presents the results of a finite element analysis of the kinematics of a total shoulder joint validated using recently published experimental data for the same prostheses. The finite element model determined the loading required to dislocate the humeral head, and the corresponding translations, to within 4% of the experimental data. The finite element method compared dramatically better to the experimental data (mean difference = 2.9%) than did rigid-body predictions (mean difference = 37%).The goal of this study was to develop an accurate method that in future studies can be used for further investigations of the effect of design parameters on dislocation, particularly in the case of a dysfunctional rotator cuff. Inherently, the method also evaluates the glenoid fixation stresses in the relatively weak glenoid bone stock. Hence, design characteristics can be simultaneously optimised against dislocation as well as glenoid loosening.
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Published date: 2006
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Local EPrints ID: 43218
URI: http://eprints.soton.ac.uk/id/eprint/43218
ISSN: 0021-9290
PURE UUID: b4cb3a14-ce4c-4c75-b240-4cf358b75245
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Date deposited: 17 Jan 2007
Last modified: 15 Mar 2024 08:53
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Author:
A.R. Hopkins
Author:
U.N. Hansen
Author:
A.A. Amis
Author:
M. Taylor
Author:
N. Gronaud
Author:
C. Anglin
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