中国组织工程研究 ›› 2014, Vol. 18 ›› Issue (40): 6536-6541.doi: 10.3969/j.issn.2095-4344.2014.40.024

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

三维有限元法分析脊柱保护器对人体胸腰段的支持与保护作用

何剑颖1,邓 亮1,李 晨1,吴小辉2,舒 勇3,董谢平1   

  1. 1江西省人民医院骨科,江西省南昌市 330006;2景德镇市中医院骨科,江西省景德镇市 333000;3南昌大学一附院骨科,江西省南昌市 330006
  • 修回日期:2014-08-29 出版日期:2014-09-24 发布日期:2014-09-24
  • 通讯作者: 董谢平,江西省人民医院骨科,江西省南昌市 330006
  • 作者简介:何剑颖,男,1980年生,江西省人,汉族,南昌大学在读博士,主要从事脊柱外科、矫形外科方面的研究。
  • 基金资助:

    国家“十一五”科技支撑项目(2008BAI68B06);江西省科技支撑项目(2010BSB00306);江西省科技厅青年基金项目(20114BAB215027);江西省专利研发引导与产业研发项目(20133BBM26119)

Three-dimensional finite element analysis on the support and protection of spine protector for thoracic-lumbar vertebra

He Jian-ying1, Deng Liang1, Li Chen1, Wu Xiao-hui2, Shu Yong3, Dong Xie-ping1   

  1. 1Department of Orthopedics, People’s Hospital of Jiangxi Province, Nanchang 330006, Jiangxi Province, China; 2Department of Orthopedics, Jingdezhen Hospital of Traditional Chinese Medicine, Jingdezhen 333000, Jiangxi Province, China; 3Department of Orthopedics, First Affiliated Hospital of Nanchang University, Nanchang 330006, Jiangxi Province, China
  • Revised:2014-08-29 Online:2014-09-24 Published:2014-09-24
  • Contact: Dong Xie-ping, Department of Orthopedics, People’s Hospital of Jiangxi Province, Nanchang 330006, Jiangxi Province, China
  • About author:He Jian-ying, Studying for doctorate, Department of Orthopedics, People’s Hospital of Jiangxi Province, Nanchang 330006, Jiangxi Province, China
  • Supported by:

    Science and Technology Program during the Eleventh Five-Year Plan, No. 2008BAI68B06; Science and Technology Program of Jiangxi Province, No. 2010BSB00306; Youth Funds by Jiangxi Provincial Science and Technology Ministry, No. 20114BAB215027; Patent Research and Development, and Industrial Study Project of Jiangxi Province, No. 20133BBM26119

摘要:

背景:人体脊柱保护器对预防人体胸腰段脊柱损伤有保护作用,新型动力性保护器的研发需要通过多种实验手段的验证。

目的:利用三维有限元法分析脊柱保护器在轴向载荷作用下对人体脊柱胸腰段的生物力学响应。
方法:从已建立的全脊柱三维有限元模型中截取胸腰段,将佩戴脊柱保护器的胸腰段模型设计为实验组,未佩戴脊柱保护器的胸腰段模型设计为对照组。给上述两组模型进行赋值、约束、加载、运算,获得目标单元的等效应力及应变。
结果与结论:在垂直承载的两组胸腰段模型中,应力均集中于L2椎体的中、后柱。根据目标单元采集数据发现,实验组与对照组模型在16 ms时达到等效应力最大值,分别为3.919,5.727 MPa。统计分析得出T12与L2节段实验组与对照组等效应力比较,P均< 0.05,对照组所受应力均大于实验组,差异有显著性意义;而T11与L1节段实验组与对照组的等效应力比较,差异无显著性意义(P > 0.05)。提示脊柱保护器可以明显减少垂直坠地时胸腰段椎体所受的应力,分担载荷,对胸腰段椎体具有保护支持作用。

中国组织工程研究杂志出版内容重点:人工关节;骨植入物;脊柱骨折;内固定;数字化骨科;组织工程


全文链接:

关键词: 植入物, 数字化骨科, 脊柱保护器, 有限元分析, 胸腰椎模型, 生物力学

Abstract:

 BACKGROUND: Human spine protector can protect human thoracic-lumbar vertebra segments against injury, and the design and development of a novel dynamic protector needs the verification of various experimental means.

OBJECTIVE: Using the three-dimensional finite element method, we evaluate the effect of spine protector and the biomechanical reaction of thoracic-lumbar vertebra under the axial loading.
METHODS: The thoracic-lumbar vertebra were cut from the whole spine three-dimensional finite element model. Then the thoracic-lumbar vertebra models carrying spine protector were taken as experimental group, while the models without the protector served as control group. All the specimens were evaluated, constrained, loaded and figured out by its properties. The results of equivalent stress and strain distribution were obtained from the data.
RESULTS AND CONCLUSION: In both groups, the stress was distributed at axial and posterior column of L2 when the load was applied in axial direction. According to the data obtained from the experiment, both the experimental group and the control group had achieved the maximum stress at 16 ms, 3.919 Mpa and 5.727 MPa, respectively. The statistical analysis result showed that the stress varied significantly at T12 and L2 in two groups (both P < 0.05). However, the stress distribution at T11 and L1 showed no significant difference between the two groups (both P > 0.05). Experimental findings indicate that, spine protector can significantly reduce the vertical stress of the thoracic-lumbar vertebra when falling on the ground, and share the vertical load, which is protective to thoracic-lumbar vertebra.

中国组织工程研究杂志出版内容重点:人工关节;骨植入物;脊柱骨折;内固定;数字化骨科;组织工程


全文链接:

Key words: thoracic vertebra, lumbar vertebra, finite element analysis, biomechanics

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