Finite element analysis of cervical spine following artificial intervertebral disc replacement
XU Bei, JIN Da-De, ZHANG Mei-Chao
Chinese Journal of Clinical Anatomy ›› 2013, Vol. 31 ›› Issue (3) : 328-332.
Finite element analysis of cervical spine following artificial intervertebral disc replacement
Objective To establish a three-dimensional finite element model of cervical spine C4～5 segment following PrestigeTM-LP artificial intervertebral disc replacement and analyze segmental motions. Methods The geometry of C4～5 vertebrae was reconstructed from computer tomography (CT) scan images of an adult male human fresh cervical spinal specimen. A FEM of C4~5 vertebrae and PrestigeTM-LP prosthesis was established and simulated clinical operation by using ANSYS10.0 system. Motions of flexion, extension, lateral bending and axial rotation were determined in physiological loading. Results Detailed geometries of vertebral bodies were modeled including ligaments, facet joints, and uncovertebral joints. Motions of flexion, extension, lateral bending, axial rotation are 5.7°, 3.5°, 5.0°,11.3°，respectively and conform with what have been reported in the literature. Conclusions The FEM possesses a high precision of geometries of vertebral bodies and biomechanical character. PrestigeTM-LP artificial disc prosthesis well preserves intervertebral segmental motion for cervical spine.
Cervical spine / Cervical artificial disc / Finite element model（FEM） / Biomechanics
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