中国组织工程研究

中国组织工程研究 ›› 2011, Vol. 15 ›› Issue (9): 1557-1561.doi: 10.3969/j.issn.1673-8225.2011.09.010

• 数字化骨科 digital orthopedics • 上一篇    下一篇

基于CT扫描及CAD技术建立下腰椎三维有限元模型

付  裕1，阮狄克2，霍洪军1，杨学军1，李晨光3   

  1. 1内蒙古医学院第二附属医院胸腰椎脊柱外科，内蒙古自治区呼和浩特市   010030
    2解放军海军总医院骨科，北京市 100037
    3北京航空航天大学宇航学院，北京市  100083
  • 收稿日期:2010-10-19 修回日期:2010-12-02 出版日期:2011-02-26 发布日期:2011-02-26
  • 作者简介:付裕★，男，1979年生，内蒙古自治区鄂尔多斯市人，汉族，2004年内蒙古医学院毕业，硕士，主治医师，主要从事胸腰椎脊柱基础及临床的研究。 13604714168@163.com
  • 基金资助:

    内蒙古医学院第二附属医院科研基金：下腰椎三维有限元模型的建立。

Construction of a three-dimensional finite element model of lower lumbar spine based on computed tomography images and computer aided design 

Fu Yu1, Ruan Di-ke2, Huo Hong-jun1, Yang Xue-jun1, Li Chen-guang3   

  1. 1Department of Spinal Surgery, Second Affiliated Hospital, Inner Mongolia Medical College,  Hohhot   010030, Inner Mongolia Autonomous Region, China
    2Department of Orthopaedic Surgery, Navy General Hospital, Beijing  100037, China
    3Aerospace College, Beijing University of Aeronautics and Astronautics, Beijing  100083, China
  • Received:2010-10-19 Revised:2010-12-02 Online:2011-02-26 Published:2011-02-26
  • About author:Fu Yu★, Master, Attending physician, Department of Spinal Surgery, Second Affiliated Hospital, Inner Mongolia Medical College, Hohhot 010030, Inner Mongolia Autonomous Region, China 13604714168@163.com
  • Supported by:

    the Science and Technology Foundation of Second Affiliated Hospital of Inner Mongolia of Medical College*

PDF

394

被引次数

25

摘要：

背景：近年来，计算机技术和有限元理论的飞速发展为构建腰椎模型提供了技术支持，有限元模型的精确性和可靠性显著提高，为研究椎间盘、椎板切除、腰椎融合、脊柱内固定材料等临床相关的生物力学问题提供了更好的平台。
目的：应用三维有限元法建立L3~5腰椎活动节段力学模型。
方法：通过CT扫描、Unigraphics V18.0软件进行影像边界记录、定标等方法，按照点、线、面、体的顺序重建三维结构，采用CAD数据处理技术，输入相关的材料特性，验证重建模型的有效性。
结果与结论：建立下腰椎的三维有限元模型(L3~5)，分析结果证明其在仿真分析中是可行的，可以模拟生物力学实验。建立的模型共有6 482个节点，31 326个单元，生成网格时利用网格生成器的扫掠和优化功能，尽量依据模型的几何外形，使网格生成的最少，兼顾了对建模准确性和计算可行性，同时又能充分满足对腰椎的生物力学研究。

关键词: 腰椎, 有限元模型, 生物力学, CT, CAD

Abstract:

BACKGROUND: Currently, the rapid developments of computer technology and finite element theory provide technical supports for construction of lumbar spine models. The finite element model with high accuracy and reliability provides better platform for clinical biomechanics, such as intervertebral discs, lamina excision, lumbar fusion, and spinal internal fixation materials.
OBJECTIVE: To construct a lumber spine (L3-5) biomechanical model using three-dimensional finite element method.
METHODS: Reconstructing the skeleton through CT scan, recording the edges of image, calibrating in sequence of point, line, face and solid. Mapped-mesh technique was used to obtain the finite element, adopt finite element commercial software package Unigraphics V18.0 was used to study the response of the disc model.
RESULTS AND CONCLUSION: The finite element model of lower lumbar spine (L3-5) was reconstructed, which can simulate biomechanical experiment. There were 6 482 nodes and 31 326 units in the model. Based on geometrical shape of model, the mesh generation was reduced minimum utilizing mesh generator, which can not only ensure model accuracy and calculation feasibility, but also meet needs of biomechanical studies. 

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