一种新的颈椎前路椎间融合器有限元分析  

Analysis of a new anterior cervical intervertebral cage device using the finite element method

作　　者：田杰 陈玲[1,2] 胡旭财 TIAN Jie;CHEN Ling;HU Xu-eai(Tianjin Key Laboratory for Advanced Mechatronie System Design and Intelligent Control;National Demonstration Center for Experimental Mechanical and Electrical Engineering Education,School of Mechanical Engineering (Tianjin University of Technology),Tianjin University of Technology,Tianjin 300384,China)

机构地区：[1]天津理工大学机械工程学院天津市先进机电系统设计与智能控制重点实验室,天津300384 [2]天津理工大学机械工程学院机电工程国家级实验教学示范中心(天津理工大学),天津300384

出　　处：《天津理工大学学报》2018年第6期1-6,共6页Journal of Tianjin University of Technology

基　　金：大学生创新创业训练计划项目资助(201710060076)

摘　　要：根据人体终板结构以及抗压强度分布特点,设计颈椎椎间融合器,用有限元方法进行仿真,对研究结果进行分析,探讨可行性.建立C5-C6完整模型和融合器模型,计算各个模型在不同运动下活动度、椎体各部分最大等效应力,查看终板和融合器应力分布.融合器植入后,颈椎活动度在不同运动下有所下降,而皮质骨和松质骨最大等效应力有所提高;C6上终板应力主要分布在终板的外缘,中央处的应力较小;融合器的等效应力主要分布在锁定孔的周围、后侧及两侧,植骨处的应力较小.根据终板结构和抗压强度分布特点设计的融合器虽然相对于完整模型活动度下降,椎体应力增大,但较其他融合器具有活动度大、应力小以及分布均匀等优点,本文的设计方法可以提高融合器的活动度,防止因应力过大造成融合器沉陷的问题.According to the structure and the distribution of compressive strength of the endplates to design cervical intervertebral cage device and analysis the research results using the finite element method to discuss the feasibility. Developing C5-C6complete model and cage model,and calculating the maximum equivalent stress of each model under different motion and viewing the stress distribution of the endplates and fusion device.The range of motion of cervical spine decreased under different movements after implantation,while maximum equivalent stress of cortical bone and cancellous bone increased.The stress of C6 upper endplate mainly distribute in periphery of the endplate while its center position is small.The equivalent stress of the cage device mainly distribute in the back and sides of the locking hole,and there is less stress in the bone grafts.The cage device based on the structure and the distribution of compressive strength of the endplates is decline of range of motion and increase of stress of vertebral body compared to cmplete model,but has a higher level of range of motion and the advantages of low stress and its uniform distribution than other cage device.The design method of this article can improve the range of motion of cage device and prevent the problem of the submerging of cage device caused by too much stress.

关 键 词：颈椎病 终板强度 融合器 终板结构 

分 类 号：R653[医药卫生—外科学]