中国组织工程研究 ›› 2017, Vol. 21 ›› Issue (31): 4983-4988.doi: 10.3969/j.issn.2095-4344.2017.31.011

• 骨科植入物 orthopedic implant • 上一篇    下一篇

三维有限元法分析钽棒置入治疗个体化股骨头坏死的力学效能

欧志学1,凌观汉2,姚 兰3,林衡锋2   

  1. 1广西中医药大学附属桂林医院(桂林市中医医院),广西壮族自治区桂林市  541002;2玉林市中西医结合骨科医院,广西壮族自治区玉林市  5370003广西中医药大学,广西壮族自治区南宁市  530000
  • 出版日期:2017-11-08 发布日期:2017-12-01
  • 通讯作者: 凌观汉,硕士,玉林市中西医结合骨科医院,广西壮族自治区玉林市 537000
  • 作者简介:欧志学,男,1971年生,汉族,2011年广州中医药大学毕业,博士,副主任医师,主要从事股骨头坏死、骨关节疾病、创伤骨科方面的研究。
  • 基金资助:

    广西壮族自治区卫计委(2014年)自筹经费科研课题项目(Z2014556)

Biomechanics of osteonecrosis of femoral head after tantalum rod implantation: a three-dimensional finite element analysis  

Ou Zhi-xue1, Ling Guan-han2, Yao Lan3, Lin Heng-feng2   

  1. 1Guilin Hospital Affiliated to Guangxi University of Chinese Medicine (Guilin TCM Hospital of China), Guilin 541002, Guangxi Zhuang Autonomous Region, China; 2Yulin Orthopedics Hospital of Chinese and Western Medicine, Yulin 537000, Guangxi Zhuang Autonomous Region, China; 3GuangXi University of Chinese Medicine, Nanning 530000, Guangxi Zhuang Autonomous Region, China
  • Online:2017-11-08 Published:2017-12-01
  • Contact: Ling Guan-han, Master, Yulin Orthopedics Hospital of Chinese and Western Medicine, Yulin 537000, Guangxi Zhuang Autonomous Region, China
  • About author:Ou Zhi-xue, M.D., Associate chief physician, Guilin Hospital Affiliated to Guangxi University of Chinese Medicine (Guilin TCM Hospital of China), Guilin 541002, Guangxi Zhuang Autonomous Region, China
  • Supported by:

    the Research Project of Guangxi Zhuang Autonomous Region Health and Family Planning Commission in 2014, No. Z2014556

摘要:

文章快速阅读:

 
文题释义:
股骨头的前外侧柱:根据股骨头的负重区对应髋臼的应力柱分区,将股骨头划分为5个应力柱。顶柱定义为站立位时股骨头的负重区,即以股骨头几何中心为顶点,围绕股骨颈轴线的40°角的圆锥体底面就是顶柱,顶柱的外侧为外侧柱,前侧为前侧柱。
个体化股骨头坏死有限元分析:针对CJFH分型中L型作的个体化研究,为进一步研究该分型在保髋疗效的评估奠定基础,初步确定L型对保髋有一定研究意义,显示外侧柱的存留对保髋疗效有至关重要性。
 
摘要
背景:研究报道股骨头前外侧柱对保髋的疗效起到关键性的作用,而中日友好医院分型(CJFH分型)强调前外侧柱的重要性,目前此分型中L型钽棒置入治疗的三维有限元研究不多。
目的:以钽棒置入术为例,建立正常、坏死和L型坏死区前外侧柱钽棒置入的髋关节仿真的三维有限元模型,并进行有限元分析及力学效能对比,探讨前外侧柱的完整性对保髋疗效的重要性,为CJFH分型的治疗提供生物力学依据。
方法:股骨头坏死的CJFH分型中L1、L2、L3型的坏死髋关节三维模型和正常髋关节三维模型选用团队已经做好的模型。在此基础上建立钽棒置入坏死股骨头的三维有限元模型,进行有限元分析。观察正常股骨头、坏死股骨头和钽棒置入坏死股骨头皮质骨壳应力分布及最大Mises应力值,对比并进行统计分析。
结果与结论:①L型坏死股骨头负重区皮质骨壳的最大Mises应力均较正常股骨头升高,其中L1型升高21.76%,L2型升高31.02%,L3型升高42.79%;②钽棒置入术后股骨头负重区皮质骨壳的最大Mises应力较术前下降,其中L1型下降13.38%,L2型下降8.81%,L3型下降11.45%;③表明当股骨头发生坏死时,因坏死骨承载应力下降,导致股骨头皮质骨壳应力集中,所以坏死较正常的最大应力大,而分型程度越高,皮质骨壳所要承载的应力集中就越大;钽棒置入后承载了一部分应力,分型程度越低,纠正越明显;④结果表明,钽棒置入术纠正了坏死股骨头皮质骨壳部分应力,钽棒在一定程度范围内可以进行塌陷预防及起到支撑软骨下骨的生物力学作用;坏死股骨头外侧柱的完整性影响保髋疗效,可能外侧柱的存留越多,保髋疗效越好,而CJFH分型程度越高,塌陷风险越高,保髋疗效也越差。

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: 0000-0002-0595-6154(欧志学)

关键词: 骨科植入物, 数字化骨科, 计算机技术, 钽棒, 股骨头坏死, 三维重建, 有限元分析, 仿真, 生物力学, 中日友好医院分型

Abstract:

BACKGROUND: The femoral anterolateral column plays a key role in hip preservation surgery, and the China-Japan Friendship Hospital (CJFH) type stresses the anterolateral column, but there is little information available in three-dimensional (3D) finite element analysis of the L-type tantalum rod implantation.

OBJECTIVE: To establish a 3D finite element model of L-type tantalum rod implantation into the normal, necrotic and L-type necrotic areas, followed by a finite element analysis, and to explore the importance of the integrity of the anterolateral column for hip preservation surgery, thus providing biomechanical evidence for the treatment of CJFH type.
METHODS: Based on the prepared 3D models of CJFH L1, L2 and L3 osteonecrosis of the femoral head (ONFH) and normal hip, the 3D finite element model of tantalum rod implantation of femoral head necrosis was established, and finite element analysis was conducted. The stress distribution and the maximum Mises stress value of cortical shell of normal femoral head, necrotic femoral head and tantalum rod implanted ONFH were observed and compared.
RESULTS AND CONCLUSION: (1) The maximum Mises of the weight-bearing area of cortical bone shell of L-type ONGH was higher than that of normal femoral, L1. L2 and L3 increased by 21.76%, 31.02%, and 42.79%, respectively. (2) The maximum Mises of weight-bearing area of cortical bone shell was decreased after tantalum rod implantation, L1 L2 and L3 decreased by 13.38%, 8.81%, and 11.45%, respectively. (3) In necrotic femoral head, the decreased bearing stress, leads to stress concentration on the femoral head bone shell, so the maximum is higher than that of the normal condition. The higher classification is, the greater the stress concentration of the cortical bone shell is. Tantalum rod implantation share certain stress. (4) Tantalum rod implantation corrects some stresses of the bone shell of ONFH, and can prevent collapse and exert the biomechanical effect of supporting subchondral bone. Furthermore, the integrity of the lateral column of the necrotic femoral head affects the efficacy of hip preservation, and more lateral column preserved always accompanied with better hip preservation. The higher CJFH classification exhibits a higher risk of collapse, and poorer hip preservation.

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: Femoral Head Necrosis, Finite Element Analysis, Biomechanics, Tissue Engineering

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