摘要
目的建立神经根型颈椎病C_3~C_7三维有限元模型,为运用该模型进行推拿整脊手法治疗神经根型颈椎病的生物力学机制研究提供基础模型。方法选择神经根型颈椎病男性患者1例,采用西门子SOMATOM Sensation64层螺旋CT扫描C_3~C_7节段,将获取的Dicom格式数据导入Mimics19.0软件进行三维重建,再将C_3~C_7节三维几何模型转换成IGES格式,导入Hyper Mesh软件中完成网格划分及材料属性赋值,最后导入Ansys对模型边界约束条件,形成完整的三维有限元模型。分析在1.2 Nm扭矩下该颈椎三维有限元模型的应力及移位变化;模拟生理状态时颈椎的前屈后伸、侧弯、旋转运动,记录运动角度,并与文献结果进行对比。结果建立的神经根型颈椎病三维有限元模型模拟了C_3~C_7共5个椎体、4个椎间盘、5种韧带,涉及网格划分节点数为146 017个,单元数为65 775个。模型清晰完整,可从不同角度观察椎体解剖结构,并能多彩色、透明或任意组合显示,较真实地反映各结构空间位置关系;体网格形状规整,结构清楚,整体分布合理。C_3~C_7三维有限元模型各结构中的应力分布不均匀,压力变化主要集中于C5、C6,椎骨及椎间盘变形移位主要集中于C3、C4。本研究建立C_3~C_7模型与文献建立颈椎模型在前屈后伸、侧弯、旋转时的运动角度差异较小,其中侧弯过程中C4~C5、C6~C7运动角度差异最小,旋转过程中C4~C5运动角度差异最小。结论成功建立了神经根型颈椎病C_3~C_7三维有限元模型。该模型可用于模拟颈椎生物力学实验,为采用推拿整脊手法治疗神经根型颈椎病的生物力学机制研究提供基础模型。
Objective To establish a three-dimensional finite element model of C 3-C 7 for cervical spondylotic radiculopathy,and to provide a basic model for the study of biomechanical mechanism of cervical spondylotic radiculopathy with massage and chiropractic manipulation.Methods One case of male patient with cervical spondylotic radiculopathy was selected.The SOMATOM Sensation 64-slice spiral CT was used to scan C 3-C 7 segment,and the acquired Dicom format data were used to import into Mimics19.0 software for three-dimensional(3D)reconstruction,and then the C 3-C 7 3D geometric model was converted into IGES format.We imported them into HyperMesh software to complete meshing and material property assignment,and finally import Ansys to model boundary constraints to form a complete 3D finite element model.The stress and displacement changes of the three-dimensional finite element model of the cervical vertebrae were analyzed under the torque of 1.2 Nm.The anterior flexion,extension,lateral bending and rotational motion of the cervical vertebrae were simulated.The angle of motion was recorded and compared with the literature results.Results The established three-dimensional finite element model of cervical spondylotic radiculopathy simulated 5 vertebral bodies,4 intervertebral discs and 5 ligaments in C 3-C 7.The number of nodes involved in meshing was 146 017,and the number of units was 65 775.The model was clear and complete,and the anatomy of the vertebral body was observed from different angles,and could be displayed in multiple colors,transparent or any combination,reflecting the spatial position relationship of each structure more realistically;the shape of the body mesh was regular,the structure was clear,and the overall distribution was reasonable.The stress distribution in each structure of C 3-C 7 three-dimensional finite element model was not uniform,the pressure changes were mainly concentrated in C 5 and C 6,and the deformation displacement of vertebrae and intervertebral disc was mainly concentrated in C 3 and C 4.In this study,the C 3-C 7 model established in this study had little angel difference with the literature in the angle of motion of the cervical vertebrae model during flexion,extension,lateral bending and rotation.The difference of C 4-C 5 and C 6-C 7 movement angles during the bending process was the smallest.The difference in C 4-C 5 movement angle was the smallest.Conclusion This study successfully establishes a three-dimensional finite element model of C 3-C 7 for cervical spondylotic radiculopathy.The model can be used to simulate cervical biomechanical experiments and will provide a basic model for the study of biomechanical mechanisms for the treatment of cervical spondylotic radiculopathy with massage chiropractic manipulation.
作者
曹盛楠
师彬
孙国栋
CAO Shengnan;SHI Bin;SUN Guodong(University of Jinan,Jinan 250022,China)
出处
《山东医药》
CAS
2018年第32期5-8,共4页
Shandong Medical Journal
基金
山东省中医药科技发展计划项目(2013-220)
山东省五级中医药师承教育项目
山东省自然科学基金资助项目(ZR2018LH019)
关键词
颈椎病
神经根型
三维有限元模型
解剖
生物力学分析
cervical spondylotic radiculopathy
three finite element model
anatomy
biomechanical analysis
