人颈椎前纵韧带生物力学特性实验研究

目的研究正常国人颈椎前纵韧带的生物力学特性．为临床提供生物力学参数。方法取正常国人8具新鲜尸体颈椎C1-C4、C4-T1不同节段前纵韧带在Shimadzu AUTOGRAPH电子万能试验机上进行单向拉伸实验研究。结果得出了前纵韧带C1～C4、C4一T1段的拉伸破坏载荷、伸长比、Lagrange张应力、Lagrange张应变、Euler应力、弹性模量等数据。对应力、应变数据以最小二乘法进行拟合，得出颈椎前纵韧带C1-C4、C4-T1段的应力应变关系表达式及曲线。结论前纵韧带C1-C4段应力大于C4-T1段，前纵韧带C1-C4、C4-T1应变差异不显著，C4-T1段前纵韧带弹性模骨大于C1-C4殷前纵韧带。

Experimental Study on Biomechanical Properties of Human the Anterior Longitudinal Ligament of Cervical Spine

Objective This experimental study aimed to evaluate biomechanical properties of human cadeavaric anterior longitudinal ligament of cervical spine for potential clinical use. Methods Anterior longitudinal ligament of C1-C4?C4-T1 segments was obtained from 8 fresh Chinese cadavers to test their tensile strength using Shimadzu AUTOGRAPH electronic universal testing machine. Results Mechanical properties of anterior longitudinal ligament of C1-C4?C4-T1 segments were obtained, including maximal tensile load and strain , Lagrange tensile stress and strain, Euler stress and elastic modulus With the least square method the stress and strain of the anterior longitudinal ligament of C1-C4?C4-T1 segments were plotted by stress-strain curve. Conclusion The stress of the C1-C4 segment was greater than that of the C4-T1 segment. There were no significant difference found in strain of the anterior longitudinal ligament of different segments. The modulus of elastic of the C4-T1 segment was however greater than that of the C1-C4 segment.