Key considerations for finite element modelling of the residuum-prosthetic socket interface
Key considerations for finite element modelling of the residuum-prosthetic socket interface
Study Design:
Computational modelling
Background:
Finite element (FE) modelling has long been proposed to support prosthetic socket design. However, there is minimal detail in the literature to inform practice in developing and interpreting these complex, highly non-linear models.
Objectives:
To identify best practice recommendations for FE modelling of lower limb prosthetics, considering key modelling approaches and inputs.
Methods:
This study developed a parametric FE model using MRI data from a transtibial amputee. Comparative analyses were performed considering socket loading methods, socket-residuum interface parameters and soft tissue material models from the literature, to quantify their effect on the residual limb’s biomechanical response to a range of parameterised socket designs.
Results:
These variables had a marked impact on the FE model’s predictions for limb-socket interface pressure and soft tissue shear distribution.
Conclusions:
All modelling decisions should be justified biomechanically and clinically. In order to represent the prosthetic loading scenario in-silico, researchers should:
- consider the effects of donning and interface friction to capture the generated soft tissue shear stresses
- use representative stiffness hyperelastic material models for soft tissues when using strain to predict injury; and
- interrogate models comparatively, against a clinically-used control.
Clinical Relevance:
Recommendations for future FE models of residual limb-prosthetic socket interface are proposed, to assist researchers in building these models and clinicians in appraising them. Any clinical application of the predictions generated by these models must be rigorously scrutinised.
138-146
Steer, Joshua
b958f526-9782-4e36-9c49-ad48e8f650ed
Worsley, Peter
6d33aee3-ef43-468d-aef6-86d190de6756
Browne, Martin
6578cc37-7bd6-43b9-ae5c-77ccb7726397
Dickinson, Alexander
10151972-c1b5-4f7d-bc12-6482b5870cad
April 2021
Steer, Joshua
b958f526-9782-4e36-9c49-ad48e8f650ed
Worsley, Peter
6d33aee3-ef43-468d-aef6-86d190de6756
Browne, Martin
6578cc37-7bd6-43b9-ae5c-77ccb7726397
Dickinson, Alexander
10151972-c1b5-4f7d-bc12-6482b5870cad
Steer, Joshua, Worsley, Peter, Browne, Martin and Dickinson, Alexander
(2021)
Key considerations for finite element modelling of the residuum-prosthetic socket interface.
Prosthetics and Orthotics International, 45 (2), .
(doi:10.31224/osf.io/k8dsg).
Abstract
Study Design:
Computational modelling
Background:
Finite element (FE) modelling has long been proposed to support prosthetic socket design. However, there is minimal detail in the literature to inform practice in developing and interpreting these complex, highly non-linear models.
Objectives:
To identify best practice recommendations for FE modelling of lower limb prosthetics, considering key modelling approaches and inputs.
Methods:
This study developed a parametric FE model using MRI data from a transtibial amputee. Comparative analyses were performed considering socket loading methods, socket-residuum interface parameters and soft tissue material models from the literature, to quantify their effect on the residual limb’s biomechanical response to a range of parameterised socket designs.
Results:
These variables had a marked impact on the FE model’s predictions for limb-socket interface pressure and soft tissue shear distribution.
Conclusions:
All modelling decisions should be justified biomechanically and clinically. In order to represent the prosthetic loading scenario in-silico, researchers should:
- consider the effects of donning and interface friction to capture the generated soft tissue shear stresses
- use representative stiffness hyperelastic material models for soft tissues when using strain to predict injury; and
- interrogate models comparatively, against a clinically-used control.
Clinical Relevance:
Recommendations for future FE models of residual limb-prosthetic socket interface are proposed, to assist researchers in building these models and clinicians in appraising them. Any clinical application of the predictions generated by these models must be rigorously scrutinised.
This record has no associated files available for download.
More information
In preparation date: 8 November 2019
Submitted date: 14 November 2019
Accepted/In Press date: 29 September 2020
Published date: April 2021
Identifiers
Local EPrints ID: 439468
URI: http://eprints.soton.ac.uk/id/eprint/439468
ISSN: 0309-3646
PURE UUID: dd8dfda8-7e02-4d1c-89e4-786c47706e47
Catalogue record
Date deposited: 23 Apr 2020 16:54
Last modified: 17 Mar 2024 03:55
Export record
Altmetrics
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics
