中国组织工程研究 ›› 2017, Vol. 21 ›› Issue (31): 4963-4968.doi: 10.3969/j.issn.2095-4344.2017.31.008

• 脊柱植入物 spinal implant • 上一篇    下一篇

融合与非融合稳定方式对损伤性腰椎活动影响的对比

宋红芳1,2,张 雯3,张 强4,刘志成1,2   

  1. 1首都医科大学生物医学工程学院,北京市 100069;2首都医科大学临床生物力学应用基础研究北京市重点实验室,北京市 100069;3中国医学科学院阜外医院,北京市 100037;4首都医科大学附属北京地坛医院骨外科学系,北京市 100015
  • 出版日期:2017-11-08 发布日期:2017-12-01
  • 通讯作者: 张强,主任医师,首都医科大学附属北京地坛医院骨外科学系,北京市 100015 刘志成,教授,博士生导师,首都医科大学生物医学工程学院,北京市 100069; 首都医科大学临床生物力学应用基础研究北京市重点实验室,北京市 100069
  • 作者简介:宋红芳,女,1975年生,山西省长治市人,汉族,2012年首都医科大学毕业,博士,副教授,主要从事生物力学方面研究。
  • 基金资助:

    北京市教育委员会科技发展计划面上项目(KM201410025012);首都医科大学基础临床合作重点项目(16JL08)

Comparison study of the effect of fusion and non-fusion fixation on the movement of injured lumbar spine

Song Hong-fang1, 2, Zhang Wen3, Zhang Qiang4, Liu Zhi-cheng1, 2   

  1. 1School of Biomedical Engineering, Capital Medical University, Beijing 100069, China; 2Beijing Key Laboratory of Fundamental Research on Biomechanics in Clinical Application, Capital Medical University, Beijing 100069, China; 3Fuwai Hospital, Chinese Academy of Medical Sciences, Beijing 100037, China; 4Department of Orthopedics, Beijing Ditan Hospital, Capital Medical University, Beijing 100015, China
  • Online:2017-11-08 Published:2017-12-01
  • Contact: Zhang Qiang, Chief physician, Department of Orthopedics, Beijing Ditan Hospital, Capital Medical University, Beijing 100015, China Liu Zhi-cheng, Professor, Doctoral supervisor, School of Biomedical Engineering, Capital Medical University, Beijing 100069, China; Beijing Key Laboratory of Fundamental Research on Biomechanics in Clinical Application, Capital Medical University, Beijing 100069, China
  • About author:Song Hong-fang, M.D., Associate professor, School of Biomedical Engineering, Capital Medical University, Beijing 100069, China; Beijing Key Laboratory of Fundamental Research on Biomechanics in Clinical Application, Capital Medical University, Beijing 100069, China
  • Supported by:

    the General Technology Research & Development Program of Beijing Municipal Education Commission, No. KM201410025012; the Key Basic-Clinical Cooperation Program of Capital Medical University, No. 16JL08

摘要:

文章快速阅读:



文题释义:
Coflex系统:由Paradigm 公司开发的一种腰椎棘突间动态内固定装置,由一个“U”形的棘突间间隔物和4 个侧翼组成。中间“U”形结构置入棘突间,起到弹力缓冲器的作用。4个侧翼在上下端各有两个,一个偏前一个偏后,固定上下棘突,且表面齿状设计,进一步增加了摩擦,提高了固定上下棘突的稳定性,防止Coflex滑脱。
椎间融合术(LIF):是通过椎间前、后路手术在椎间植骨或植入Cage并植骨等方法,使得腰椎间关节之间发生骨性结合,进而重新建立和维持脊柱稳定性、纠正腰椎异常负荷承载方式的一种行之有效治疗方法。
 
摘要
背景:腰椎退行性病变是腰椎自然老化、退化的生理病理过程,严重影响着患者的生活质量。传统的手术方式会带来一些并发症,棘突间动态固定Coflex临床效果不错,但是缺乏实验数据的支持。
目的:研究腰椎稳定方式对其运动影响,从生物力学角度为临床手术提出参考意见。
方法:选取新鲜的猪腰椎制备实验模型5组:分别为正常状态(A组)、损伤状态(B组)、L3-L4Coflex固定(C组)、L3-L4Coflex固定+减压(D组)、L3-L4椎间融合固定(E组)。运用机器人手臂系统对每具标本5种模型进行前屈/后伸、左/右侧弯、左/右轴向旋转6个方向的生物力学加载;通过多方向力矩传感器采集加载力矩,配合三维动作捕捉系统记录手术节段及整体腰椎的运动范围,分析稳定方式对腰椎运动的影响。

结果与结论:①4个实验组(B、C、D、E)中,腰椎手术节段(L3-L4)的三维角度变化范围与正常状态相比,Coflex固定组与正常状态组间差异较小,而损伤状态组、融合组与正常状态组差异较大;②融合组虽然可以恢复损伤后的腰椎活动度,但其活动角度与Coflex固定组相比小了很多;③结果表明,Coflex固定后可以将损伤状态的活动角度恢复到正常状态,维持腰椎稳定性的同时,还保留了一定的活动度。腰椎失稳后用Coflex弹性内固定较融合固定更好,固定后性能更接近正常腰椎。                 

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: 0000-0002-0486-0599(宋红芳)

关键词: 骨科植入物, 脊柱植入物, 生物力学, 动态固定, 椎体间融合术

Abstract:

BACKGROUND: Degenerative change in lumbar spine is the natural physiological and pathological process with age increasing, which seriously affects the patients’ quality of life. Conventional surgical treatments may bring about some complications. Interspinous stabilization Coflex demonstrates good clinical outcomes, while there is lack of experimental evidence.

OBJECTIVE: To investigate the effect of fixation methods on the movement of lumbar vertebrae, and to provide reference for clinical operation from the aspect of biomechanics.
METHODS: Five fresh specimens of pig cadaveric lumbar spine were selected and divided into five groups: blank control group (group A), injury group (group B), L3-L4 Coflex fixed (group C), L3-L4 Coflex fixed plus decompression (group D), and L3-L4 intervertebral fusion fixed (group E). The biomechanical performance of the five lumbar specimens was tested in six loading directions of flexion/extension, left/right lateral bending, and left/right axial rotation driven by a robot system. The motion range of the operation segments (L3-L4) and the whole lumbar spine was observed by a multi-directional torque sensor combined with a three-dimensional motion capture system. Finally, the influence of lumber fixation methods on the spinal movement was explored.
RESULTS AND CONCLUSION: (1) For the range of three-dimensional angle at the operation segments (L3-L4), it was found that groups C and D were similar to group A, and groups B and E were quite different from group A. (2) Group E could restore the motion range of the injured segments, but the motion angle was much smaller than that in the groups C and D. (3) These results indicate that the motion angle of the injured spine treated with Coflex can restore to the normal state, with long-term stability. For unstable lumbar spine, interspinous Coflex is better than transforaminal lumbar interbody fusion, which can induce similar biomechanical properties to normal lumbar spine after operation.
 
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: Biomechanics, Intervertebral Disk Degeneration, Internal Fixators

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