Key considerations for finite element modelling of the residuum-prosthetic socket interface.

Autor:	Steer JW; Bioengineering Science Research Group, School of Engineering, Faculty of Engineering and Physical Sciences, University of Southampton, Southampton, UK., Worsley PR; Clinical Academic Facility, School of Health Sciences, Faculty of Environment and Life Sciences, University of Southampton, Southampton, UK., Browne M; Bioengineering Science Research Group, School of Engineering, Faculty of Engineering and Physical Sciences, University of Southampton, Southampton, UK., Dickinson A; Bioengineering Science Research Group, School of Engineering, Faculty of Engineering and Physical Sciences, University of Southampton, Southampton, UK.
Jazyk:	angličtina
Zdroj:	Prosthetics and orthotics international [Prosthet Orthot Int] 2021 Apr 01; Vol. 45 (2), pp. 138-146.
DOI:	10.1177/0309364620967781
Abstrakt:	Background: Finite element 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 nonlinear models. Objectives: To identify best practice recommendations for finite element modelling of lower limb prosthetics, considering key modelling approaches and inputs. Study Design: Computational modelling. Methods: This study developed a parametric finite element model using magnetic resonance imaging data from a person with transtibial amputation. 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 residuum's biomechanical response to a range of parameterised socket designs. Results: These variables had a marked impact on the finite element 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 (1) consider the effects of donning and interface friction to capture the generated soft tissue shear stresses, (2) use representative stiffness hyperelastic material models for soft tissues when using strain to predict injury and (3) interrogate models comparatively, against a clinically-used control. (Copyright © 2020 The Authors. Published by Wolters Kluwer incorporated on behalf of The International Society for Prosthetics and Orthotics.)
Databáze:	MEDLINE
Externí odkaz:	Zobrazit plný text záznamu