中国组织工程研究 ›› 2020, Vol. 24 ›› Issue (21): 3281-3286.doi: 10.3969/j.issn.2095-4344.2571

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

有限元分析不同牵伸时长相邻腰椎节段和椎间盘应力及位移的变化

李  民1,2,董竑麟3,汪桂珍3,闫沛春3   

  1. 1福建中医药大学附属康复医院,福建省福州市  3500032福建省康复技术重点实验室,福建省福州市  350003;3福建中医药大学康复医学院,福建省福州市  350003
  • 收稿日期:2019-08-08 修回日期:2019-08-10 接受日期:2019-10-09 出版日期:2020-07-28 发布日期:2020-04-14
  • 通讯作者: 李民,博士,主任医师,福建中医药大学附属康复医院,福建省福州市 350003
  • 作者简介:李民,男,1973年生,福建省三明市人,汉族,2009年福建中医学院毕业,博士,主任医师,主要从事骨关节疾病康复的基础和临床研究。
  • 基金资助:

    福建省科技厅高校产学研合作项目(2018Y4006);福建省康复产业研究院技术创新平台科研项目(2015Y2001-24);福建省卫生计生科研人才培养项目(2018-CX-48);福建省教育厅高校青年自然基金重点项目(JZ160444)

Effect of different stretching durations on adjacent lumbar segments: changes in intervertebral disc stress and displacement

Li Min1, 2, Dong Honglin3, Wang Guizhen3, Yan Peichun3   

  1. 1Rehabilitation Hospital Affiliated to Fujian University of Traditional Chinese Medicine, Fuzhou 350003, Fujian Province, China; 2Fujian Provincial Key Laboratory of Rehabilitation Technology, Fuzhou 350003, Fujian Province, China; 3Rehabilitation Medical College of Fujian University of Traditional Chinese Medicine, Fuzhou 350003, Fujian Province, China
  • Received:2019-08-08 Revised:2019-08-10 Accepted:2019-10-09 Online:2020-07-28 Published:2020-04-14
  • Contact: Li Min, Rehabilitation Hospital Affiliated to Fujian University of Traditional Chinese Medicine, Fuzhou 350003, Fujian Province, China; Fujian Provincial Key Laboratory of Rehabilitation Technology, Fuzhou 350003, Fujian Province, China
  • About author:Li Min, MD, Chief physician, Rehabilitation Hospital Affiliated to Fujian University of Traditional Chinese Medicine, Fuzhou 350003, Fujian Province, China; Fujian Provincial Key Laboratory of Rehabilitation Technology, Fuzhou 350003, Fujian Province, China
  • Supported by:
    The University-Industry-University-Research Cooperation Project of Fujian Science and Technology Department, No. 2018Y4006; Technical Innovation Platform Research Project of Fujian Rehabilitation Industry Research Institute, No. 2015Y2001-24; Fujian Health Family Planning Research Talents Training Project, No. 2018-CX-48; Key Project of University Youth Natural Fund of Fujian Education Department, No. JZ160444

摘要:

文题释义:

脊柱手法床:该手法床是模拟南少林骨伤科整脊手法,将传统医学通督脉理论与现代牵伸理论相结合的一种机械设备。具体操作是借助智能调控高压缓冲气室对气柱速率和频率的调节及气阀门控制系统对气体的充放,可以模拟㨰动、弹拨、牵伸等多种手法,有利于促进手法的规范化、自动化发展。

腰椎三维有限元分析:腰椎三维有限元模型的建立是通过CT、MRI 等途径获取腰椎的影像学资料,使用MIMICS、GEOMAGIC STUDIO 以及HYPERMESH等相关的软件对图像进行处理并建立三维有限元模型。随着科学技术的不断发展,腰椎有限元模型的建立在一定程度上完善了腰椎间盘、椎体间小关节、连接韧带、关节囊等软组织以及周围肌肉等结构的模型建立。

背景:与传统牵伸手法对比,利用脊柱手法床气柱叠加结构进行牵伸可以很好地掌控牵引时间,通过有限元分析能详细计算出相邻腰椎节段的应力,为临床脊柱手法床的腰椎牵引提供更好的牵引处方理论依据。

目的:利用脊柱手法床模拟倒盖金被手法进行牵伸,并通过有限元分析不同牵伸时长对相邻腰椎节段应力大小及分布的影响。

方法:选择健康男性志愿者1例,年龄26岁、身高174 cm、体质量60 kg,受试者对试验方案理解并签署知情同意书,研究获得福建中医药大学附属康复医院伦理委员会的批准(批准号:2016XJS-001-01)。依据志愿者T12-S1的CT图像,建立正常人体腰椎的有效三维有限元模型,通过三维有限元分析利用脊柱手法床顶推L3棘突时,L3在手法的牵引下分别维持至10,20,30 s时,上下相邻的腰椎间盘、椎小关节的应力变化情况,并且分析该变化的内在规律及作用机制。

结果与结论:①顶推高度为5 cm,作用时长介于1.25-17 s时,相邻腰椎节段的应力值是持续增大的,椎间盘:L2-L3为4.60-5.68 MPa,L3-L4为5.26-6.61 MPa;椎小关节:L2-L3为7.01-8.67 MPa,L3-L4为5.22-6.50 MPa;②在顶推作用时长超过24 s以后,相邻椎间盘、椎小关节应力基本保持不变;③因此脊柱手法床作用于腰椎时对相邻腰椎节段不会造成损伤;使用脊柱手法床的作用时长应在25-30 s之间。

ORCID: 0000-0002-4468-1464(李民)

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

关键词: 牵伸, 时长, 腰椎, 模型, 生物力学, 脊柱手法床, 三维有限元

Abstract:

BACKGROUND: In contrast to traditional drafting techniques, the superposition structure of the bed air column of spinal manipulation contributes to controlling the duration of traction. Finite element analysis is used to calculate the stress of adjacent lumbar segments with different traction durations. It provides a better theoretical basis for lumbar traction prescription in clinical spinal manipulative bed.

OBJECTIVE: To analyze the stress and distribution of adjacent lumbar segments with different traction durations using the finite element analysis when the spine manipulation bed is used for traction.

METHODS: A healthy male volunteer, aged 26 years, with a height of 174 cm and a weight of 60 kg, was selected, who was fully informed of the study protocol and signed an informed consent. The study protocol was approved by the Ethics Committee of Rehabilitation Hospital Affiliated to Fujian University of Traditional Chinese Medicine with an approval No. 2016XJS-001-01. According to the CT images of volunteers T12-S1, an effective three-dimensional finite element model of the lumbar spine was established. By means of three-dimensional finite element analysis, the stress changes of the lumbar vertebrae and facet joint adjacent to the L3 were calculated when the traction was maintained for 10, 20 and 30 seconds respectively. The internal law and mechanism of the changes were analyzed and discussed.

RESULTS AND CONCLUSION: (1) When the pushing height was 5 cm and the action time was 1.25-17 seconds, the stress value of adjacent lumbar segments increased continuously. For the intervertebral disc, the stress value was 4.60-5.68 MPa for L2-L3, and 5.26-6.61 MPa for L3-L4; for the facet joint, the stress value was 7.01-8.67 MPa for L2-L3 and 5.22-6.50 MPa for L3-L4. (2) The stress of adjacent vertebral segments and facet joints remained basically unchanged after pushing for more than 24 seconds. Therefore, when the spine manipulation bed acts on the lumbar spine, it will not damage the adjacent lumbar segments, and the duration of action should be between 25 and 30 seconds.

Key words: stretch, duration, lumbar spine, model, biomechanics, spine manipulation bed, three-dimensional finite element analysis 

中图分类号: