Robin S, Skalli W, Lavaste F
ENSAM, Laboratoire de Biomécanique, Paris, France.
Eur Spine J. 1994;3(2):84-90. doi: 10.1007/BF02221445.
The main objective of this study was the assessment of the influence of geometrical factors on the behavior of lumbar segments. To this end, a three-dimensional, parameterized, finite element model of the lumbar spine was used, and the results were compared with inhouse experimental results and with the few published experimental results available concerning either the geometry of the tested samples or the differences observed at different vertebral levels. Furthermore, in order to appreciate the relative importance of the geometry, the influence of the variation of some other parameters was studied, such as the orientation of the facet joints, the gap between the articular processes, and the Young's modulus of the disk fibers. As a first approach, a series of computations was carried out in order to evaluate the role of geometry in the mechanical behavior differences observed at different levels. It has been found that geometrical factors do exert a noticeable influence on the behavior of the spine, especially those which interfere with the dimensions of the intervertebral disk.
本研究的主要目的是评估几何因素对腰椎节段行为的影响。为此，使用了腰椎的三维参数化有限元模型，并将结果与内部实验结果以及与所测试样本的几何形状或在不同椎体水平观察到的差异相关的少数已发表实验结果进行了比较。此外，为了了解几何形状的相对重要性，研究了一些其他参数变化的影响，如小关节的方向、关节突之间的间隙以及椎间盘纤维的杨氏模量。作为第一步，进行了一系列计算以评估几何形状在不同水平观察到的力学行为差异中的作用。已经发现几何因素确实对脊柱的行为产生显著影响，特别是那些干扰椎间盘尺寸的因素。
