中国组织工程研究 ›› 2024, Vol. 28 ›› Issue (12): 1823-1828.doi: 10.12307/2024.022

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

腰椎定点旋转手法操作中拇指推力的有限元分析

苏少亭1,周红海2,3,侯召猛1,陆  延2,3,王  伟4,陈一鑫4,陈龙豪2,3,田  聪5   

  1. 1广西中医药大学,广西壮族自治区南宁市   530000;2广西中医药大学骨伤学院,广西壮族自治区南宁市   530000;3广西中医骨伤科生物力学与损伤修复重点实验室,广西壮族自治区南宁市   530000;4广西中医药大学第一附属医院,广西壮族自治区南宁市   530000;5安徽阜阳市阜南县中医院,安徽省阜南县   236300
  • 收稿日期:2022-12-30 接受日期:2023-03-16 出版日期:2024-04-28 发布日期:2023-08-22
  • 通讯作者: 周红海,博士,教授,主任医师,广西中医药大学骨伤学院,广西壮族自治区南宁市 530000;广西中医骨伤科生物力学与损伤修复重点实验室,广西壮族自治区南宁市 530000
  • 作者简介:苏少亭,男,1992年生,陕西省汉中市人,汉族,广西中医药大学在读博士,医师,主要从事针对脊柱退行性疾病中医药治疗研究。
  • 基金资助:
    国家自然科学基金(81660800) ,项目负责人:周红海;广西中医药大学研究生教育创新计划项目(YCBXJ2022004),项目负责人:侯召猛 

Finite element analysis of thumb thrust in lumbar fixed-point rotation manipulation

Su Shaoting1, Zhou Honghai2, 3, Hou Zhaomeng1, Lu Yan2, 3, Wang Wei4, Chen Yixin4, Chen Longhao2, 3, Tian Cong5   

  1. 1Guangxi University of Chinese Medicine, Nanning 530000, Guangxi Zhuang Autonomous Region, China; 2College of Orthopedics and Traumatology, Guangxi University of Chinese Medicine, Nanning 530000, Guangxi Zhuang Autonomous Region, China; 3Guangxi Key Laboratory of Biomechanics and Injury Repair in Traditional Chinese Medicine Orthopedics, Nanning 530000, Guangxi Zhuang Autonomous Region, China; 
  • Received:2022-12-30 Accepted:2023-03-16 Online:2024-04-28 Published:2023-08-22
  • Contact: Zhou Honghai, MD, Professor, Chief physician, College of Orthopedics and Traumatology, Guangxi University of Chinese Medicine, Nanning 530000, Guangxi Zhuang Autonomous Region, China; Guangxi Key Laboratory of Biomechanics and Injury Repair in Traditional Chinese Medicine Orthopedics, Nanning 530000, Guangxi Zhuang Autonomous Region, China
  • About author:Su Shaoting, Doctoral candidate, Physician, Guangxi University of Chinese Medicine, Nanning 530000, Guangxi Zhuang Autonomous Region, China
  • Supported by:
    National Natural Science Foundation of China, No. 81660800 (to ZHH); Postgraduate Education Innovation Program of Guangxi University of Chinese Medicine, No. YCBXJ2022004 (to HZM)

摘要:


文题释义:

腰椎定点旋转手法:属于中医脊柱正骨手法的范畴,其具有悠久的历史和丰富的临床实践经验,该手法可通过纠正小关节紊乱和错位、促进椎间盘位移、松解神经根粘连、恢复病理节段动静态力学平衡,从而缓解腰腿痛症状,是保守治疗腰椎椎间盘突症的重要技术手段,临床运用广泛。
三维有限元:有限元技术是利用数学建模方法,根据模型上已知的节点数目、坐标系和材料特性,从而计算出这个区域的总结,并进行定量分析。在医学研究方面,通过对模型进行网格划分,然后施加不同的载荷、材料属性、边界条件,从而观察局部区域的应力、应变、位移等数值,是中医正骨手法力学研究的重要工具。


背景:腰椎定点旋转手法操作过程中需要医生双手协同操作,进而输出旋扳力和拇指推力,通过对椎间盘产生位移和调节应力分布来治疗腰椎间盘突出,但是对于拇指推力的力学作用及其加载方向对手法效应的生物力学影响目前尚不清楚。

目的:比较拇指不同推力方向下,腰椎定点旋转手法治疗腰椎间盘突出的生物力学差异。
方法:构建L3-5正常三维有限元模型并进行有效性验证,然后参考椎间盘退变Pfirrmann分级,通过修改L4/5椎间隙高度、髓核体积以及纤维环、髓核、韧带材料参数来模拟椎间盘退变,最终构建L4/5椎间盘中度退变伴左旁中央型突出病理模型;然后以病理模型为研究对象,模拟手法向右侧旋扳,以改变拇指推力方向为条件,建立3种操作模式(M1:拇指向左推;M2:拇指向右推;M3:不施加推力),对比3种操作模式下突出物的位移和椎间盘应力,以及小关节软骨的应力、应变。

结果与结论:①L4/5椎间盘突出物最大位移值:M1位移为2.672 3 mm,M2为1.1561 mm,M3为1.826 4 mm,M1>M3>M2;②L4/5椎间盘最大Von Mises应力:M1为1.846 7 MPa,M2为0.419 0 MPa,M3为1.257 9 MPa,M1>M3>M2;③L4/5双侧小关节软骨均产生了不同程度的接触应力变化:M1为0.485 5 MPa,M2为0.026 7 MPa,M3为0.441 4 MPa,M1>M3>M2;右侧软骨接触力:M1为0.000 5 MPa,M2为0.025 9 MPa,M3为0.001 3 MPa,M2>M3>M1,左侧大于右侧,M1数值最高,软骨的应变与接触应力变化现象一致;④提示不同的手法操作模式均会对病变节段椎间盘及附属结构产生一定的生物力学影响;M1操作模式下突出物位移、椎间盘应力以及左侧关节软骨接触的应力、应变最大,能更好地促进椎间盘位移、平衡应力分布及复位小关节紊乱,故操作更优。

https://orcid.org/0000-0002-6990-2219 (苏少亭) 

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: 腰椎定点旋转手法, 拇指推力, 椎间盘退变, 骨错缝, 三维有限元

Abstract: BACKGROUND: Lumbar fixed-point rotation operation needs collaborative operation of the doctor’s hands, and outputs rotation and thumb thrust. Lumbar disc herniation can be treated through disc displacement and adjusting stress distribution. However, the mechanical effects of thumb thrust and the biomechanical effects of loading direction on manipulative effects remain unclear.  
OBJECTIVE: To compare the biomechanical difference of lumbar fixed-point rotation manipulation for treating lumbar disc herniation under different thrust directions.
METHODS: The L3-5 normal three-dimensional finite element model was constructed and validity was verified. According to the intervertebral disc degeneration Pfirrmann grade, intervertebral disc degeneration was simulated by modifying the L4/5 intervertebral space height, the volume of the nucleus pulposus, as well as the material parameters of the annulus fibrosus, nucleus pulposus, and ligament. Finally, the pathological model of L4/5 moderate disc degeneration with left para-central herniation was constructed, and then the pathological models were used as research objects. Simulation technique: spinning to the right; taking the condition on changing the direction of the thumb thrust to establish three modes of operation (M1: thumb push to the left; M2: thumb push to the right; M3: no thrust push). The protrusion displacement and the disc stress, and the stress and strain of the facet joint cartilage were compared in the three operating modes.
RESULTS AND CONCLUSION: (1) Maximum displacement value of L4/5 disc herniation: displacement was 2.672 3 mm for M1, 1.156 1 mm for M2, 1.826 4 mm for M3, M1 > M3 > M2. (2) The maximum Von Mises stress of L4/5 discs was 1.846 7 MPa for M1, 0.419 0 MPa for M2, and 1.257 9 MPa for M3, M1 > M3 > M2. (3) L4/5 bilateral small cartilage produced different degrees of contact stress changes: It was 0.485 5 MPa for M1, 0.026 7 MPa for M2, and 0.441 4 MPa for M3, M1 > M3 > M2. Right cartilage contact force was 0.000 5 MPa for M1, 0.025 9 MPa for M2, and 0.001 3 MPa for M3, M2 > M3 > M1; the left greater than the right, M1 had the highest value; cartilage strain was consistent with contact stress changes. (4) Different operation modes will have some biomechanical influences on the diseased intervertebral disc and accessory structure. The M1 operation mode can maximize the displacement of protrusion, disc stress and left joint cartilage contact, which can better promote disc displacement, balance stress distribution and reduce facet joint disorder, so the operation is better.

Key words: lumbar fixed-point rotation manipulation, thumb thrust, disc degeneration, bone dislocation, three-dimensional finite element

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