脊柱椎管损伤模型的生物力学实验研究*

目的：通过逐步增量法试验比较椎管创伤后所产生的不同变化和各自的特点，构建一种精确模拟椎体骨折的测试模型，为临床手术提供科学依据。方法：应用冲击试验机测试人脊椎标本, 分别测量不同冲击力时椎管直径的试验参数，进行线性回归(最小二乘法)、方差分析、t检验分析。结果：冲击后发生最小的脊柱椎管骨折时，冲击力变量和椎管骨质破裂应变有交互作用（R2=0.85，P<0.05)。结论：逐步增量法是构建脊柱外伤的一种可靠的方法。

Biomechanical experiment study of establishment of spinal canal trauma model

Objective: To construct a test model of accurate simulant of vertebral fracture and to compare the different changes and characteristics of spinal canal trauma, with incremental test to provide a scientific basis for clinical surgery. Method:An impact test device was used in human spinal samples for measurement. During different impacts the test parameters of spinal canal diameters were measured for analysis. Result: In the smallest spinal canal fracture after impact there was an interaction between impact variance and spinal canal bone fracture strain(R2=0.85, P<0.05). Conclusion: Incremental trauma approach was found to be a reliable method in the establishment of trauma of human spine specimens.