Three Dimensional Finite Element Investigation of the Mechanical Response of the C5-C6 Functional Spinal Unit Under Flexion, Extension and Lateral Bending

Benaoumeur Aour; Nadhir Damba

doi:10.15866/iremos.v8i4.6969

Three Dimensional Finite Element Investigation of the Mechanical Response of the C5-C6 Functional Spinal Unit Under Flexion, Extension and Lateral Bending

Benaoumeur Aour^(1*), Nadhir Damba⁽²⁾

^(*) Corresponding author

Authors' affiliations

DOI: https://doi.org/10.15866/iremos.v8i4.6969

Abstract

The aim of this work is to develop a detailed three dimensional, anatomically accurate, finite element model of the human cervical spine structure using computed tomography (CT) scans. To this end, the geometrical shapes of the vertebrae, the disc and the ligaments were automatically created on the basis of personalized CT scans. An annulus with several layers has been also designed. An hyper-elastic law of Mooney-Rivlin has been applied for the modelling of the disc behaviour. A good agreement has been found between the results of the developed model and those of the experimental and numerical data previously published. The loads effects on the distribution of stresses and displacements into the intervetebral disc and ligaments were also presented and discussed. The results show that the stress concentration is located in the anterior portion of the annulus fubrosus in the case of flexion / extension and in the lateral region in the case of lateral bending. However, for the ligaments, it has been found that the stress concentration will always occur into the capsular ligament.
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Keywords

Biomechanics; Cervical Spine; Intervertebral Disc; FEM; Hyperelasticity

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