Strain Distribution on the Sagittal Plane of an Intervertebral Disc.
Strain Distribution on the Sagittal Plane of an Intervertebral Disc.
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椎间盘矢状面上的应变分布。
DOI：
10.1299/kikaia.57.1202
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发表时间：
1991
期刊：
影响因子：
--
通讯作者：
K. Kaneda
中科院分区：
文献类型：
--
作者：
S. Tadano;H. Ishikawa;M. Itoh;K. Kaneda
明确腰痛的机械原因需要了解整个胸腰椎的应力和/或应变状态。然而，椎间盘在体内的变形行为还没有得到充分的研究。本文提出了一种新的方法来评估在体椎间盘在屈伸状态下矢状面上发生的应变状态。也就是说，在北海道大学医学院通过FCR（富士计算机射线照相术）测量盘平面上的位移。引入等参形函数来表示圆盘的变形，从而估计圆盘的内部应变分布。因此，压缩应变在腰椎间盘的前部，并在后部的拉伸应变被证实发生在体内屈曲。伸展状态下的应变分布与屈曲状态相反。
A Clarification of the mechanical causes for low-back pain requires a knowledge of the states of stress and/or strain throughout the thoraco-lumbar spine. However, the deformation behavior of an intervertebral disc in vivo has not been investigated sufficiently. This paper presents a new method to evaluate the state of strain occurring on the sagittal plane of an intervertebral disc in vivo under flexion and extension. That is, the displacement on the plane of a disc was measured by FCR (Fuji computer radiography) at the medical hospital of Hokkaido University. The internal strain distribution of a disc was estimated by use of an isoparametric shape function introduced to express the deformation of a disc. Consequently, compressive strain at the anterior part of lumbar discs, and tensile strain at the posterior part were confirmed to occur in vivo under flexion. On the other hand, the strain distribution under extension was opposite to that under flexion.