中国组织工程研究 ›› 2013, Vol. 17 ›› Issue (35): 6261-6266.doi: 10.3969/j.issn.2095-4344.2013.35.007

• 脊柱损伤基础实验 basic experiments of spinal injury • 上一篇    下一篇

腰椎L3-L5三维有限元模型的有效性验证

徐  浩1,张秋林2,唐  昊2,陈  博3   

  1. 1吴江第一人民医院骨科,江苏省吴江市  215000;2上海长海医院骨科,上海市  200433;3上海伤骨科研究所,上海市  200025
  • 收稿日期:2013-02-22 修回日期:2013-04-20 出版日期:2013-08-27 发布日期:2013-08-27
  • 通讯作者: 唐昊,主治医师,上海长海医院骨科,上海市 200433 xuhaomouse2004@yahoo.com.cn
  • 作者简介:徐浩☆,男,1979年生,江苏省盐城市人,汉族,2009年解放军第二军医大学毕业,博士,主治医师,主要从事脊柱生物力学研究。 Xuhaomouse2004@sina.com

Validation and verification of L3-L5 lumbar three-dimensional finite element model

Xu Hao1, Zhang Qiu-lin2, Tang Hao2, Chen Bo3   

  1. 1Department of Orthopedics, the First Hospital of Wujiang, Wujiang  215000, Jiangsu Province, China; 2Department of Orthopedics, Changhai Hospital, Shanghai  200433, China; 3Traumatology and Orthopedics Institute of Shanghai, Shanghai  200025, China
  • Received:2013-02-22 Revised:2013-04-20 Online:2013-08-27 Published:2013-08-27
  • Contact: Tang Hao, Attending physician, Department of Orthopedics, Changhai Hospital, Shanghai 200433, China xuhaomouse2004@yahoo.com.cn
  • About author:Xu Hao☆, M.D., Attending physician, Department of Orthopedics, the First Hospital of Wujiang, Wujiang 215000, Jiangsu Province, China Xuhaomouse2004@sina.com

摘要:

背景:建立精确的有限元模型是对脊柱进行有限元力学分析的重要基础,精确的腰椎有限元模型报道较少。
目的:采用正常人腰椎CT资料建立L3-L5三维有限元模型,并进行有效性验证。
方法:健康男性志愿者,39岁,身高175 cm,体质量65 kg,采用16排螺旋CT机对L3-L5节段进行扫描,得到1.25 mm层厚的 CT图片共101张,Geomagic9.0软件下建立几何实体模型,然后确定单元类型、划分有限元网格,建立有限元模型进行加载计算。
结果与结论:建立了正常人L3-L5三维有限元模型,整个模型共有213 736个节点和799 779个单元。该模型L3-L4,L4-L5节段活动范围与文献尸体标本生物力学测试结果一致,验证了模型的有效性,可用于实验研究。

关键词: 骨关节植入物, 脊柱损伤基础实验, 骨与关节三维有限元分析, 腰椎, 有限元, 生物力学, 应力, 脊柱, CT, 网格, 椎间盘, 省级基金

Abstract:

BACKGROUND: Creation of a precise finite element model is an important basis for the finite element mechanical analysis of the spine. The reports on the precise finite element model are less.
OBJECTIVE: To create L3-L5 lumbar three-dimensional finite element model and validate this model with normal CT data.
METHODS: A 39-year-old male healthy volunteer with the height of 175 cm and weighted 65 kg was selected, then the L3-L5 lumbar spines were scanned with 16 row spiral CT to obtain 101 CT images with the thickness of 1.25 mm. Solid geometric model was established with Geomagic9.0 software, then determined the unit type, divided the finite element mesh, and established the finite element model for loading and calculating. 
RESULTS AND CONCLUSION: A L3-L5 lumbar three-dimensional finite element model was established. It included 213 736 nodes and 799 779 elements. The ranges of motion of L3-L4 and L4-L5 segments of the model were consistent with cadaveric biomechanical testing results, verified the effectiveness of the model, so the model could be used for experimental research.

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