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胸腰段各种减压术对脊柱稳定性影响的生物力学实验研究
引用本文:阮狄克,张西正.胸腰段各种减压术对脊柱稳定性影响的生物力学实验研究[J].生物医学工程学杂志,1992,9(1):35-41.
作者姓名:阮狄克  张西正
作者单位:第四军医大学唐都医院骨科,第四军医大学唐都医院骨科,第四军医大学唐都医院骨科,第四军医大学唐都医院骨科,第四军医大学唐都医院骨科,第四军医大学唐都医院骨科,第四军医大学唐都医院骨科,西安矿业学院材料力学系,西安交通大学材料力学系 西安 710038,西安 710038,西安 710038,西安 710038,西安 710038,西安 710038,西安 710038
摘    要:本文通过生物力学方法评价了各种减压术对胸腰段脊柱稳定性的影响。结果表明:(1)椎板减压术后抗弯强度降低最明显(P<0.01),约为对照组的三分之一。屈伸活动度亦较对照组增加了一倍(P<0.05)。(2)侧前方减压术使屈曲状态下水平位移及旋转角均增加(P<0.05)抗压及抗弯强度亦降低。(3)侧方减压术使矢状面水平位移及旋转角明显增加(P<0.01),并使抗压强度降低最明显(P<0.01)。从结果分析可以认为后柱结构、特别是棘上韧带和棘间韧带对维持脊柱稳定,防止胸腰椎过度屈曲起重要作用。椎体结构及两侧小关节突的完整对轴向载荷的传导起主要作用,并有防止在轴向载荷作用发生矢状面水平及旋转位移作用。

关 键 词:胸腰椎  减压术  生物力学  稳定性

Effect of Various Thoraclumbar Decompressions on the Stability of Spine: An Experimental Study by Biomechanics
Ruan Dike Sheng Genbiao Lue Zuejin Ma Baoan Suen Honghui Wang Wanming Ding Yong.Effect of Various Thoraclumbar Decompressions on the Stability of Spine: An Experimental Study by Biomechanics[J].Journal of Biomedical Engineering,1992,9(1):35-41.
Authors:Ruan Dike Sheng Genbiao Lue Zuejin Ma Baoan Suen Honghui Wang Wanming Ding Yong
Abstract:32 fresh specimens of thoracolumbar spine, (T9-L3) were obtained from slaughtered swines. They were divided into four operation groups and five parameters were determined. The results were. (1) The lateral roentgenograms of flexion-extension showed that the motions of group C and group D were gr adually increased, and the range of motion of group D was as twice as that of group A(P<0.01). (2) Group B showed an increase in the horizontal displacement and rotation of sagittal plane of superior vertebral body(P<0.05), and decrease in both com pression strength and bending strength (P<0.05) (3) Group D showed not only a significant increase (P<0.01) in the horizontal displacement and rotation of sagittal plane of superior vertebral body, but also a significant decrease (P>0.02)in bending strength. We concluded that the posterior column structures, especially the supraspinal ligaments and interspinal ligaments, would play an important role in maintaining the stability of the spine. An intact structure of both vertebral body and articular processes not only are important in transmiting axial loads, but also important in preventing the horizontal displacement and rotation of sagittal p plane under axial loads.
Keywords:Thoracolumbar spine  Decompression  Biomechanics  Stability
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