Furlong D R, Palazotto A N
J Biomech. 1983;16(10):785-95. doi: 10.1016/0021-9290(83)90002-7.
The purpose of this paper was to study the influence of surgical herniation on the viscoelastic properties of the intervertebral disc. The work was broken down into two phases: experimentation and analysis. In the first step of experimentation, five specimens were excised from the L1-L2 level of young adult rhesus monkeys. The prepared specimen consisted of the intervertebral joint and the two adjacent vertebral centrums without either the posterior elements or associated soft tissue. The specimens were subjected to a constant compressive load for eight hours followed by a sixteen hour relaxation time. During all the load cycles, displacement of the specimens was measured with an LVDT. After the first compressive test, the specimens were herniated and then the compressive test repeated. In the second phase of the work, a viscoelastic axisymmetric finite element model was used to quantify the experimental data. A three parameter Kelvin solid was employed in the finite element model. The results of this paper will be used to construct a dynamic model for the vertebral column.
本文旨在研究手术性椎间盘突出对椎间盘粘弹性特性的影响。该工作分为两个阶段：实验和分析。在实验的第一步，从年轻成年恒河猴的L1-L2节段切除五个标本。制备的标本包括椎间关节和两个相邻的椎体中心，不包括后部结构或相关软组织。对标本施加恒定压缩载荷八小时，随后有十六小时的松弛时间。在所有加载循环中，用线性可变差动变压器测量标本的位移。在第一次压缩试验后，使标本突出，然后重复压缩试验。在工作的第二阶段，使用粘弹性轴对称有限元模型对实验数据进行量化。有限元模型采用三参数开尔文固体。本文的结果将用于构建脊柱的动态模型。
