Mar 24

Modelo numérico para ligamentos de tobillo sanos y lesionados

Numerical model for healthy and injured ankle ligaments

 

Fuente
Este artículo es originalmente publicado en:

 

https://www.ncbi.nlm.nih.gov/pubmed/28220401

https://link.springer.com/article/10.1007%2Fs13246-017-0533-7

 

 

De:

 

 

Forestiero A1, Carniel EL1,2, Fontanella CG3,4, Natali AN1,2.

Australas Phys Eng Sci Med. 2017 Feb 20. doi: 10.1007/s13246-017-0533-7. [Epub ahead of print]

 

 

Todos loa derechos reservados para:

 

© Australasian College of Physical Scientists and Engineers in Medicine 2017

 

 

 

Abstract

The aim of this work is to provide a computational tool for the investigation of ankle mechanics under different loading conditions. The attention is focused on the biomechanical role of ankle ligaments that are fundamental for joints stability. A finite element model of the human foot is developed starting from Computed Tomography and Magnetic Resonance Imaging, using particular attention to the definition of ankle ligaments. A refined fiber-reinforced visco-hyperelastic constitutive model is assumed to characterize the mechanical response of ligaments. Numerical analyses that interpret anterior drawer and the talar tilt tests reported in literature are performed. The numerical results are in agreement with the range of values obtained by experimental tests confirming the accuracy of the procedure adopted. The increase of the ankle range of motion after some ligaments rupture is also evaluated, leading to the capability of the numerical models to interpret the damage conditions. The developed computational model provides a tool for the investigation of foot and ankle functionality in terms of stress-strain of the tissues and in terms of ankle motion, considering different types of damage to ankle ligaments.

KEYWORDS:

Ankle ligaments; Constitutive model; Foot mechanics; Numerical model

 

 

Abstract

The aim of this work is to provide a computational tool for the investigation of ankle mechanics under different loading conditions. The attention is focused on the biomechanical role of ankle ligaments that are fundamental for joints stability. A finite element model of the human foot is developed starting from Computed Tomography and Magnetic Resonance Imaging, using particular attention to the definition of ankle ligaments. A refined fiber-reinforced visco-hyperelastic constitutive model is assumed to characterize the mechanical response of ligaments. Numerical analyses that interpret anterior drawer and the talar tilt tests reported in literature are performed. The numerical results are in agreement with the range of values obtained by experimental tests confirming the accuracy of the procedure adopted. The increase of the ankle range of motion after some ligaments rupture is also evaluated, leading to the capability of the numerical models to interpret the damage conditions. The developed computational model provides a tool for the investigation of foot and ankle functionality in terms of stress-strain of the tissues and in terms of ankle motion, considering different types of damage to ankle ligaments.

KEYWORDS:

Ankle ligaments; Constitutive model; Foot mechanics; Numerical model

 

 

 

Resumen


El objetivo de este trabajo es proporcionar una herramienta computacional para la investigación de la mecánica del tobillo bajo diferentes condiciones de carga. La atención se centra en el papel biomecánico de los ligamentos del tobillo que son fundamentales para la estabilidad de las articulaciones. Un modelo de elementos finitos del pie humano se desarrolla a partir de Tomografía Computarizada y Resonancia Magnética, con especial atención a la definición de los ligamentos de tobillo. Se asume que un modelo constitutivo visco-hiperelástico reforzado con fibra reforzada caracteriza la respuesta mecánica de los ligamentos. Se realizan análisis numéricos que interpretan el cajón anterior y las pruebas de inclinación de los talares reportados en la literatura. Los resultados numéricos están de acuerdo con la gama de valores obtenidos por pruebas experimentales que confirman la exactitud del procedimiento adoptado. También se evalúa el aumento de la amplitud de movimiento del tobillo después de la rotura de algunos ligamentos, lo que conduce a la capacidad de los modelos numéricos para interpretar las condiciones de daño. El modelo computacional desarrollado proporciona una herramienta para la investigación de la funcionalidad del pie y tobillo en términos de estrés-deformación de los tejidos y en términos de movimiento de tobillo, considerando diferentes tipos de daño a los ligamentos de tobillo.

 


PALABRAS CLAVE:
Ligamentos del tobillo; Modelo constitutivo; Mecánica de los pies; Modelo numérico

 

PMID:   28220401   DOI:   10.1007/s13246-017-0533-7

Deja un comentario

Your email address will not be published.