A healthy volunteer was recruited as the modelling subject,and cervical spine continuity tomography was performed using a 64-row helical CT with the scanning area set to the C1-T3 vertebral segments.The software was used to implement inverse modelling.A three-dimensional finite element model of the C1-T3 segment was established through simulation to analyze the stresses in this model under forward flexion conditions.It was aimed to verify the validity and the biomechanical characteristics of the model.A normal cervical spine model and a cervical forward flexion finite element model were established.The range of motion,vertebral body and intervertebral disc stress of the normal cervical spine model and the cervical forward flexion model were modified to be consistent with the results of previous cervical spine biomechanical model tests.Therefore,the models established in the method were reliable,due to the validation and good biomechanical properties.In this study,a full cervical and T1-T3 thoracic spine model was developed to investigate the biomechanical phenomena of the cervical spine in the forward neck flexion posture.It was found that poor neck posture led to more pronounced stress concentration phenomena in the vertebral body,along with increased peak pressure on the vertebral body and the compression on the intervertebral discs.These changes resulted in an increased risk of neck pain risk and cervical dysplasia.The results indicated that excessive forward flexion of the cervical spine in adolescents should be avoided.
关键词
颈前屈/全颈椎/颈椎生物力学/应力分布/有限元方法
Key words
anterior cervical flexion/total cervical spine/cervical spine biomechanics/stress distribution/finite element methods
维普
万方数据