Abstract:

BACKGROUND: With the fast development of computer technology, biomechanical study of cervical vertebra is not limited in animal or human corpses, because computer model can provide a more accurate model.
OBJECTIVE: To develop a three-dimensional, finite element model of a human C _2-7 based on previous studies, and to provide experimental data for the biomechanical study of the cervical spine.
METHODS: A normal young 28-year-old male, without obvious cervical spondylosis history, was selected, and C-spine X-rays at posteroanterior, oblique, and over extension and over flexion position were performed to deplete cervical spondylosis. The CT scanning images were dealed with Software Mimics and Geomagic to obtain the finite element, and software ANSYS was used to study the response of the model. Under a 1.8 N•m segmental movement and force displacement response were observed and compared with abroad experimental results.
RESULTS AND CONCLUSION: The new finite element model was composed of six vertebrae (C _2-7), five discs (C _2/3-6/7) and main ligaments. The model consisted of solid elements with 23 348 nodes and 215 749 units. The results of the biomechanical study were better correlated with the available experimental data. It indicates that the finite element model of cervical spine at C _2-7 can be used to imitate the biomechanical experiment of cervical spine.