【颈椎动力植入术后颈椎生物力学有限元分析】。

PubMed ID
发表日期 2016年Aug月

原始出处 神武医学工学札记=生物医学工程学报=神武医学工学札记
Sheng wu yi xue gong cheng xue za zhi = Journal of biomedical engineering = Shengwu yixue gongchengxue zazhi
作者 Wang  Chenxi  Zhao  Gaiping  Bai  Leilei  Chen  Nanxin  Song  Yanmei  Chen  Eryun  Zhao  Qinghua 

文献标题 【颈椎动力植入术后颈椎生物力学有限元分析】。
[Finite Element Analysis of Biomechanics of Cervical Spine after Dynamic Cervical Implant Surgery].

文献摘要

本研究旨在探讨颈椎动力植入(DCI)术后椎间盘和椎体的运动范围(ROM)和应力变化,以及力传递方式对相邻节段的影响,采用DCI植入加椎间融合的方法建立颈椎C5,6节段退变治疗的有限元模型,在屈、伸、伸两种手术方式下对ROM及相邻椎间盘和椎体的应力进行分析,分析了侧弯和轴向旋转工况,结果表明,DCI模型手术节段的ROM保存良好,能恢复到正常的ROM分布(振幅减小小于25%),相邻节段的动力学特性受影响较小,手术节段的活动度降低86%-91%,相邻节段的活动度、椎间盘应力和椎体应力明显增加,C5椎体应力增加达171.21%,因此DCI手术对颈椎活动度和应力影响较小,为临床DCI和融合手术提供了理论依据。


This study aims to investigate the range of motion(ROM)and the stress variation in the intervertebral disc and the vertebral body on adjacent segments and the influence of force transmission mode after the dynamic cervical implant(DCI)surgery.Two types of surgery,DCI implantation and interbody fusion were used to establish the finite element model of the cervical C5,6segment degeneration treatment.The ROM and the adjacent discs and vertebral body stresses of two procedures under flexion,extension,lateral bending and axial rotation working conditions were analyzed.The results showed that ROM of the surgical segment in DCI model was well preserved and could restore to the normal ROM distributions(reduction of the amplitude was less than 25%),and the kinetic characteristics of adjacent segments was less affected.In fusion surgery model,however,ROM of the surgical segment was reduced by 86%-91%,while ROM,disc stress and vertebral stress of adjacent segments were increased significantly,and stress of the C5 vertebral body was increased up to 171.21%.Therefore DCI surgery has relatively small influence on cervical ROM and stress.The study provides a theoretical basis for DCI and fusion surgery in clinic.