title: Investigation of the biomechanical behaviour of hindfoot ligaments.
abstract: The aim of this work is to provide a computational tool for the mechanical characterization of the hindfoot ligaments. The investigation is performed by a coupled numerical and experimental approach. For this purpose, a numerical model that represents the complex structural configuration of the hindfoot and the typical features of the mechanical behaviour of the ligament tissue is developed. The geometrical analysis of the anatomical site is performed starting from the processing of computed tomography and magnetic resonance images. Accounting for morphometric measurements, the virtual solid model provides an averaged configuration of the hindfoot structure. In order to specify the mechanical behaviour of the ligament tissue, a fibre-reinforced visco-hyperelastic model is adopted. The formulation accounts for the anisotropic configuration, geometric non-linearity, non-linear elasticity and time-dependent phenomena. Numerical analyses are performed to evaluate the biological tissues and structure mechanics with regard to physiological boundary conditions, accounting for dorsiflexion and plantarflexion movements. In order to evaluate the reliability of the numerical model developed, the experimental data are compared with the numerical results. The numerical results are in agreement with the range of values obtained by experimental test confirming the accuracy of the procedure adopted.
authors: Centre of Mechanics of Biological Materials, Department of Industrial Engineering, University of Padua, Padua, Italy. antonella.forestiero@unipd.it
authors: Antonella
authors: A
authors: Forestiero
authors: Emanuele L
authors: EL
authors: Carniel
authors: Chiara
authors: C
authors: Venturato
authors: Arturo N
authors: AN
authors: Natali
mesh_terms: D000818:Animals; D016880:Anisotropy; D000843:Ankle Joint / Q000033:anatomy & histology / Q000502:physiology*; D003198:Computer Simulation; D055119:Elastic Modulus / Q000502:physiology; D006801:Humans; D008023:Ligaments, Articular / Q000033:anatomy & histology / Q000502:physiology*; D008953:Models, Anatomic; D008954:Models, Biological; D016059:Range of Motion, Articular / Q000502:physiology*; D013314:Stress, Mechanical; D013718:Tensile Strength / Q000502:physiology
keywords: Ankle ligaments; constitutive model; foot mechanics; numerical analysis