Biomechanical characteristics of the porcine denticulate ligament in different vertebral levels of the cervical spine-preliminary results of an experimental study.
Biomechanical characteristics of the porcine denticulate ligament in different vertebral levels of the cervical spine-preliminary results of an experimental study.
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DOI：
10.1016/j.jmbbm.2014.02.010
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发表时间：
2014-06
影响因子：
3.9
通讯作者：
Katarzyna Polak;M. Czyz;K. Ścigała;W. Jarmundowicz;R. Będziński
中科院分区：
文献类型：
--
作者：
Katarzyna Polak;M. Czyz;K. Ścigała;W. Jarmundowicz;R. Będziński
研究背景目前关于齿状韧带力学性质的研究很少，也没有报道这些性质在脊柱不同节段的变化。本研究的目的是对齿状韧带的载荷-拉伸和应力-应变特性进行实验测定，并确定其在不同颈椎水平的特性是否发生变化。方法从7个新鲜的猪颈脊髓标本中解剖出98个猪齿状韧带标本。所有标本均以2 mm/m in的速度进行单轴拉伸试验，并记录其载荷-拉伸特性。结果分析显示，在尾部方向，椎体破裂力有所降低，其中C1椎体水平(1.04±0.41N)与C7椎体水平(0.55±0.12N)之间存在显著差异(P=0.037)。杨氏׳S模量值平均值为2.06 mpa，C7最小值为1.31 mpa，C5最大值为2.46 mpa。结论不同颈椎标本的齿状韧带断裂力有显著差异。在对人类颈髓进行数值建模时，应考虑所提供的数据。
BackgroundFew studies exist on the mechanical properties of denticulate ligaments and none report the variation in these properties at different levels of the spine. The aim of this study was to perform an experimental determination of load–extension and stress–strain characteristics of the denticulate ligament and to establish if their properties change at different vertebral levels of the cervical spine.MethodThe study was carried out on a total of 98 porcine denticulate ligament samples dissected from seven fresh porcine cervical spinal cord specimens. All of the samples were subjected to an uniaxial tensile test at a speed of 2 mm/min, during which the load–extension characteristics were registered.ResultsThe analysis revealed a decrease of the failure force in the caudal orientation indicated by significant differences between the C1 (1.04±0.41 N) and C7 (0.55±0.12 N) vertebral levels (P=0.037). The average ultimate force that broke the denticulate ligaments was 0.88 N. The mean value of Young׳s modulus was 2.06 MPa with a minimum of 1.31 MPa for C7 and maximum of 2.46 MPa for C5.ConclusionsThe values of the denticulate ligament failure force in samples from different cervical vertebrae levels differ significantly. The presented data should be taken into consideration during numerical modelling of the human cervical spinal cord.