摘要
目的建立全颈椎(C1-C7)三维有限元模型,进行人体颈椎的生物力学特性研究,以其应用于临床的诊断和治疗。方法以1例健康成年女性志愿者为研究对象,利用CT图像,基于3D插补法,建立人体脊柱颈椎三维有限元模型。结果本研究成功地建立了颈椎三维数字化模型,包括7个椎体、5个椎间盘、后部结构及主要7条韧带。模型体积为74.878cm3,表面积为326.16cm2。整个模型由578007个单元,123358个节点构成。对模型进行了加载计算,其结果能够反映颈椎的正常生理功能。结论本研究所建颈椎三维有限元模型高度模拟了颈椎的结构与材料特性,具有结构完整、空间结构的测量准确度高、单元划分精细、重点突出等优点。在进行加载计算时发现,椎体、小关节、椎间盘的等效应力、剪切力前屈位时要大于后伸位,计算结果与以往实验结果基本相符,所建颈椎的三维有限元模型可以用于模拟颈椎的生物力学实验。
Objective To establish three dimensional finite element model of the whole cervical spine and investigate biomechanic characteristic of the human cervical spine for application of clinical diagnosis and therapy. Method A healthy adult female was subjected, three dimensional finite element model of the whole cervical spine was established using the method of 3D interpolation with CT. Result The model included seven vertebrae ,five discs,postical structure and seven ligaments.The volume of the whole model is 74.878 cm^3,the surface area is 326.16 cm^2,which consisting of 578 007 elements,123 358 nodes,comparing the simulation data with the literature,the validity of the model was verified. Conclusions The three dimensional finite element model simulates the structure and property of cervical spine, whose structure is whole, its elements is fine, the model is very accurate and credible. The equivalent （von Mises） stress and the shear stress of centum, facet joints and intervertebral disc in flexion is higher than in extension,the result of the biomechanic study was better correlated with the available experimental data.Which indicates that our model could be used to analyse the biomechanics characteristic of the human cervical spine f in different condition.
出处
《医用生物力学》
EI
CAS
CSCD
2009年第3期178-182,共5页
Journal of Medical Biomechanics
基金
教育部博士学科点专项基金资助项目(20070022038)
关键词
有限元法
模型
颈椎
生物力学
Finite element method
Model
Cervical spine
Biomechanics
作者简介
孟庆华（1975-），女，博士，讲师，研究方向：人机工程学。通讯作者：孟庆华，Tel：13102231178；E—mail：huaqingmeng666@163．com。
