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thoracolumbar
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  thoracolumbar
Camptocormia is defined as an abnormal, severe and involuntary forward flexion of the thoracolumbar spine, which becomes manifest during standing and walking and subsides in the recumbent position.
      
Spinal subarachnoid hemorrhage due to ruptured solitary aneurysm at thoracolumbar level with fatal outcome
      
Alternating monomeric paresis with decreased skin temperature and hyperhidrosis in a case of thoracolumbar myelopathy
      
Magnetic resonance imaging of the thoracolumbar cord showed abnormal signal intensity with syrinx formation mainly at T12 to L1 vertebral level.
      
Interbody Fusion in Thoracolumbar Fractures (T11-L2) Using the Percutaneous Dorsolateral Technique
      
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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...

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.

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。

Postoperative CT examination of 13 patients with fractures of the thoracolumbar and lumbar spine were analyzed for the location of 50 screws of the transpedicular external fixation. It includes the angles of insertion ,and the screws pedicle diameters. The results were considered excellent in 56 percent of all screws. 44 percent of all pedicles were instrumented with acceptable deviations from the anatomic axes. At the same time, the indirect method in CT was discussed and considered much better than those...

Postoperative CT examination of 13 patients with fractures of the thoracolumbar and lumbar spine were analyzed for the location of 50 screws of the transpedicular external fixation. It includes the angles of insertion ,and the screws pedicle diameters. The results were considered excellent in 56 percent of all screws. 44 percent of all pedicles were instrumented with acceptable deviations from the anatomic axes. At the same time, the indirect method in CT was discussed and considered much better than those direct measurement.

本文对13例胸腰椎骨折经椎弓根外固定治疗术后的50枚螺钉进行位置分析.内容涉及在CT片上测量螺钉角度及螺钉与椎弓根管壁的关系.结果显示:有56%的螺钉位置正确;有44%螺钉存在一些不足,但均未破坏椎弓根的解剖结构.同时,还讨论了CT片间接测量法,认为该方法与其他直接测量方法相比,具有相当的优越性.

This study was undertaken to investigate the viscoelastic properties of the human thoracolumbar spine. Uniaxial tensile failure tests were performed on two groups of specimens obtained from 18 individuals 40-85 years old. These groups of specimens were selected as related to anatomical fiber orientation, i. e. caudomedially and caudolaterally.The biomechanical properties of the specimens were determined at five different strain rates of 0. 1, 0. 25, 1.3, and 4 sec-1. The maximum stress, strain at rupture,...

This study was undertaken to investigate the viscoelastic properties of the human thoracolumbar spine. Uniaxial tensile failure tests were performed on two groups of specimens obtained from 18 individuals 40-85 years old. These groups of specimens were selected as related to anatomical fiber orientation, i. e. caudomedially and caudolaterally.The biomechanical properties of the specimens were determined at five different strain rates of 0. 1, 0. 25, 1.3, and 4 sec-1. The maximum stress, strain at rupture, and Young modulus were obtained for each group. The results show that there is no significant difference between both anatomical orientations for all the biomechanical parameters.However, the maximum stress, strain at rupture and Young modulus were found to increase with increasing strain rates(up to 3 sec-1). At higher levels, the strain at rupture and the modulus become constants suggesting an upper limit.

本研究对人胸腰段脊柱的粘弹特性作了观察,对两组40~85岁的人体胸腰椎标本作了单轴拉伸断裂试验。根据解剖学纤维方向(即尾内侧和尾外侧方向)来选择两组标本。以五种不同的应变速率来判断标本的生物力学特性。获得每组标本的最大断裂应力、应变和杨氏模量。结果表明,两种解剖方向之间各种生物力学参数均无显著差异。然而,实验发现最大断裂应力、应变和杨氏模量随应变速率增加而增加。应变速率大于3/秒,则断裂应变和杨氏模量保持不变,提示已达到上限。

 
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