中国组织工程研究 ›› 2017, Vol. 21 ›› Issue (11): 1753-1757.doi: 10.3969/j.issn.2095-4344.2017.11.020

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

胸腰段血管瘤有限元模型建立及生物力学分析

江仁兵,董 磊,刘启震,武峻申,白靖平   

  1. 新疆医科大学附属肿瘤医院骨与软组织病区,新疆维吾尔自治区乌鲁木齐市新市 830000
  • 出版日期:2017-04-18 发布日期:2017-05-06
  • 通讯作者: 白靖平,博士,教授,新疆医科大学附属肿瘤医院骨与软组织病区,新疆维吾尔自治区乌鲁木齐市新市 830000
  • 作者简介:江仁兵,男,1968年生,新疆维吾尔自治区乌鲁木齐市新市人,汉族,2014年新疆医科大学毕业,博士,主任医师,副教授,主要从事骨与软组织肿瘤的研究。
  • 基金资助:

    国家自然科学基金项目(81360282)

Finite element model establishment of thoracolumbar hemangioma and biomechanical analysis  

Jiang Ren-bing, Dong Lei, Liu Qi-zhen, Wu Jun-shen, Bai Jing-ping   

  1. Ward of Bone and Soft Tissue, Tumor Hospital Affiliated to Xinjiang Medical University, Urumqi 830000, Xinjiang Uygur Autonomous Region, China
  • Online:2017-04-18 Published:2017-05-06
  • Contact: Bai Jing-ping, M.D., Professor, Ward of Bone and Soft Tissue, Tumor Hospital Affiliated to Xinjiang Medical University, Urumqi 830000, Xinjiang Uygur Autonomous Region, China
  • About author:Jiang Ren-bing, M.D., Chief physician, Associate professor, Ward of Bone and Soft Tissue, Tumor Hospital Affiliated to Xinjiang Medical University, Urumqi 830000, Xinjiang Uygur Autonomous Region, China
  • Supported by:

     the National Natural Science Foundation of China, No. 81360282

摘要:

文章快速阅读:

 

 

文题释义:
有限元分析:有限元法是根据变分法原理求解数学上可描述的物理问题的一种数值计算方法。它的主要优点是能够解决结构、材料性质和载荷情况比较复杂的问题。但有限元方法结果受诸多因素的影响,研究的基础和前提是建立精确的模型。
等效应力:等效应力是弹塑性力学里的VonMises应力,主要考察的是材料在各个方向上的应力差值,因为在实验室里获得的材料强度都是单向载荷作用下的强度,所以有时候材料所受的单向载荷可能很大,但并没有造成破坏,这就是看其等效应力。
 
摘要
背景:关于胸椎段肿瘤生物力学方面的研究比较多,但是有关有限元分析胸腰段椎体血管瘤骨折风险的研究不多。
目的:建立胸腰段椎体血管瘤有限元模型,分析其生物力学分布特点,评估脊椎血管瘤的骨折风险。
方法:建立T12-L2椎体的正常椎体、血管瘤椎体(血管瘤占椎体松质骨比例分别为20%,40%,60%,80%)、骨水泥填充椎体三维有限元模型,并进行力学分析。分别予以600 N垂直静态压力下正常椎体、血管瘤椎体、骨水泥填充的椎体等效应力分布及特点。
结果与结论:①建立了有效的T12-L2椎体有限元模型。在静态压力作用下3组模型L1椎体皮质骨应力传导无明显差异,应力最大部均出现在椎弓根基底部、关节突关节及峡部;②在骨皮质完整情况下,椎体血管瘤占椎体松质骨20%-40%时病变椎体与正常椎体应力分布无统计学差异;当比例为60%-80%时,病变椎体与正常椎体应力分布有统计学差异;③建立的胸腰段三维有限元模型具有可用性;生物力学实验显示,椎体皮质骨完整性、松质骨破坏比例是椎体血管瘤骨折风险关键因素。

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: 0000-0003-1069-693X(江仁兵)

关键词: 骨科植入物, 脊柱植入物, 有限元, 椎体血管瘤, 等效应力, 国家自然科学基金

Abstract:

BACKGROUND: Most of studies focus on the biomechanical characteristics of thoracic spine neoplasm, but there is little report on the fracture risk in the patients with vertebral hemangioma through finite element analysis.

OBJECTIVE: To establish a finite element model of vertebral hemangioma, and to analyze its biomechanical characteristics, and assess the risk of vertebral fracture.
METHODS: Three-dimensional finite element models of T12-L2 vertebrae from normal individuals, the patients with vertebral hemangioma (hemangioma accounting for 20%, 40%, 60%, 80% of the vertebral cancellous bone) and bone cement filling were established, respectively, and then the mechanical characteristics were analyzed. The stress distribution and characters of each model were determined under a vertical static pressure of 600 N.
RESULTS AND CONCLUSION: (1) Three-dimensional finite element models of T12-L2 vertebrae were established successfully. Under static pressure, the stress distribution of L1 cortical bone showed no significant difference among models, and the maximum stress all occurred at the base of pedicle, zygapophysial joint and isthmus. (2) The stress distribution did not differ significantly between vertebral hemangioma accounting for 20%-40% of vertebral cancellous bone with complete cortical bone and normal ones, but which differed significantly in hemangioma accounting for 60%-80%. (3) To conclude, the established thoracolumbar three-dimensional model is available. Additionally, biomechanical tests manifest that the completeness of cortical bone and destruction ratio of cancellous bone destruction are key factors for the fracture risk of vertebral hemangioma.

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

Key words: Finite Element Analysis, Spine, Hemangioma, Stress, Mechanical, Tissue Engineering

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