Pintar F A, Yoganandan N, Myers T, Elhagediab A, Sances A
Department of Neurosurgery, Medical College of Wisconsin, Milwaukee.
J Biomech. 1992 Nov;25(11):1351-6. doi: 10.1016/0021-9290(92)90290-h.
Biomechanical properties of the six major lumbar spine ligaments were determined from 38 fresh human cadaveric subjects for direct incorporation into mathematical and finite element models. Anterior and posterior longitudinal ligaments, joint capsules, ligamentum flavum, interspinous, and supraspinous ligaments were evaluated. Using the results from in situ isolation tests, individual force-deflection responses from 132 samples were transformed with a normalization procedure into mean force-deflection properties to describe the nonlinear characteristics. Ligament responses based on the mechanical characteristics as well as anatomical considerations, were grouped into T12-L2, L2-L4, and L4-S1 levels maintaining individuality and nonlinearity. A total of 18 data curves are presented. Geometrical measurements of original length and cross-sectional area for these six major ligaments were determined using cryomicrotomy techniques. Derived parameters including failure stress and strain were computed using the strength and geometry information. These properties for the lumbar spinal ligaments which are based on identical definitions used in mechanical testing and geometrical assay will permit more realistic and consistent inputs for analytical models.
从38具新鲜人体尸体标本中测定了六种主要腰椎韧带的生物力学特性，以便直接纳入数学模型和有限元模型。对前纵韧带、后纵韧带、关节囊、黄韧带、棘间韧带和棘上韧带进行了评估。利用原位分离试验的结果，通过归一化程序将132个样本的个体力-位移响应转换为平均力-位移特性，以描述非线性特征。基于力学特性以及解剖学考虑的韧带响应，被分为T12-L2、L2-L4和L4-S1水平，同时保持个体性和非线性。总共给出了18条数据曲线。使用冷冻切片技术测定了这六种主要韧带的原始长度和横截面积的几何测量值。利用强度和几何信息计算了包括破坏应力和应变在内的派生参数。这些基于力学测试和几何分析中相同定义的腰椎韧带特性，将为分析模型提供更真实和一致的输入。
