中国组织工程研究

中国组织工程研究 ›› 2019, Vol. 23 ›› Issue (12): 1903-1907.doi: 10.3969/j.issn.2095-4344.1118

• 骨与关节生物力学 bone and joint biomechanics • 上一篇    下一篇

足部有限元模型模拟碾压伤的生物力学分析

张 宏1，范雅丽1，杨东浩1，任国山2，周宇宁2，闫占平1   

  1. 1石家庄医学高等专科学校解剖教研室，河北省石家庄市  050599；2河北医科大学解剖教研室，河北省石家庄市 050017
  • 出版日期:2019-04-28 发布日期:2019-04-28
  • 通讯作者: 任国山，教授，河北医科大学解剖教研室，河北省石家庄市 050017
  • 作者简介:张宏，男，1976年生，河北省张家口市人，汉族，2007年河北医科大学毕业，讲师，主治医师，主要从事临床应用解剖学和数字解剖学研究。
  • 基金资助:

    河北省科技攻关项目(11276103D-16)，项目负责人：任国山

Biomechanical analysis of foot crush injury based on finite element model

Zhang Hong1, Fan Yali1, Yang Donghao1, Ren Guoshan2, Zhou Yuning2, Yan Zhanping1   

  1. 1Department of Anatomy, Shijiazhuang Medical College, Shijiazhuang 050599, Hebei Province, China; 2Department of Anatomy, Hebei Medical University, Shijiazhuang 050017, Hebei Province, China
  • Online:2019-04-28 Published:2019-04-28
  • Contact: Ren Guoshan, Professor, Department of Anatomy, Hebei Medical University, Shijiazhuang 050017, Hebei Province, China
  • About author:Zhang Hong, Lecturer, Attending physician, Department of Anatomy, Shijiazhuang Medical College, Shijiazhuang 050599, Hebei Province, China
  • Supported by:

    the Science and Technology Research and Development Project of Hebei Province, No. 11276103D-16 (to RGS)

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摘要：

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文题释义：
Von Mises应力：又称“范式等效应力”，遵循材料力学第四强度理论(形状改变比能理论)。可以用来对疲劳、破坏等进行评价，是弹塑性力学里的一个力学概念。
跗跖关节：是指足跗骨与跖骨间的关节，位于足中部且位置最高，其结构复杂，在遭受碾压等损伤时首当其冲且最易受伤。
 
摘要
背景：利用已建立的足部有限元数字模型，仿真模拟碾压工况下足骨的力学分布及损伤。
目的：对足部三维有限元数字模型进行模拟碾压伤有限元力学分析，探讨有限元方法进行人足受力与损伤研究的新技术。
方法：对1名健康女性志愿者足部(足尖至胫骨远端、腓骨远端在内的所有骨及关节)行螺旋CT扫描，将三维重建软件生成的足部三维数字模型导入有限元软件ANSYS 13.0中处理生成有限元模型。对受力面加载100，200，500，1 000 N的压力，模拟压力缓慢作用于足背。经有限元力学计算步骤，对其进行模拟碾压伤有限元生物力学计算分析。
结果与结论：①计算结果显示在碾压力作用下，随着压力的增加，足骨所产生的应力普遍升高，应力最大值均出现在足跟前内侧；②跖骨中应力主要集中在第一、二、三跖骨；③在跗骨中的应力主要集中在跗骨与跖骨、各跗骨之间的关节处；④随着压力的增加，应力逐渐向跗跖关节内侧集中，内侧楔骨应力较其余跗骨大；⑤经过模拟碾压伤情况下跗跖关节有限元应力分析，得出碾压伤情况下应力最大并集中部位，与临床跗跖关节损伤病人的骨折多发部位一致，间接证实了有限元模型的可靠性，可以为跗跖关节损伤研究提供数字化平台。

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
ORCID: 0000-0002-5101-1450(任国山)

关键词: 足部, 跗跖关节, 三维有限元, 模拟碾压伤, 生物力学, 应力集中, 跖骨应力, 跗跖关节损伤

Abstract:

BACKGROUND: Mechanical distribution and damage of foot bones under rolling condition are simulated by using the established foot finite element digital model.

OBJECTIVE: To simulate the crush injury by using the three-dimensional finite element model of foot, and to explore a new technique for studying the stress and damage of human foot by finite element method.
METHODS: Foot (bones and joints from toe to distal tibia and distal fibula) of one female volunteer underwent CT scanning. The three-dimensional reconstructed digital model was imported into the ANSYS 13.0 software. The finite element mechanical analysis of simulating crush injury was carried out by setting 100, 200, 500 and 1 000 N of pressure, and solving the test calculation.
RESULTS AND CONCLUSION: (1) Under rolling condition, the stress of foot bones was increased with pressure increasing, and the maximum stress occurred on the anteromedial heel. (2) Metatarsal stress mainly concentrated on the first, second and third metatarsuses. (3) Tarsal stress mainly concentrated on the joints between tarsus and metatarsus, and joints between tarsuses. (4) With the pressure increasing, the stress gradually concentrated on the medial side of tarsometatarsal joint. The stress of medial cuneiform bone was larger than the other tarsuses. (5) Finite element stress analysis of tarsometatarsal joint under simulated crush injury shows that the maximum stress and the site of the strain in the case of crush injury is consistent with that of the patients with clinical tarsal injury, and indirectly confirms the reliability of the finite element model, which can provide a digital platform for the study on tarsal and plantar joint damage.

Key words: Tissue Engineering, Foot Bones, Finite Element Analysis, Biomechanics

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