Establishment And Analysis Of A Three-dimensional Finite Element Model Of Human Axis (C2)

Objective To establish the Axis finite element model with three-dimensional finite element method, and make the preliminary biomechanical analysis by using this model.Method DICOM image data of the cervical spine of a healthy adult man were obtained by spiral CT and processed with Mimics software. The data were imported to ANSYS software to become a3D entity. Based on the model of axis, the stress different position of axis was analysis while skull was in neutral, flexion and posterior extension position.Results The Axis finite element model included1717nodes and5772units, and consistent with the biomechanical analysis. The model was in good running under external force. In the model of Axis, when load forced on superior articular facet of axis, the biggest Von Mises stress focused on the base of Dens and the smaller was on the stenosis of cervical arch. When the load forced on Dens and skull in excessive flexion, the biggest stress significantly focused on the base of Dens.Conclusions The finite element model of Axis can simulate natural condition of cervical spine and facilitate the further biomechanical research. While skull was in neutral, flexion and posterior extension position, the stress focused on the base of Dens and the stenosis of cervical arch, but when head is in excessive flexion, the biggest stress force focused on the base of Dens.