C2-3、T10-11和L3-4椎间盘段弯曲力学特性

The Bending (Extension Bit) Mechanical Properties of C2-3,T10-11,L3-4 Intervertebral Disc and Adjacent Vertebral Bod

预防和治疗椎间盘脱出等退行性改变需要了解C2-3、T10-11、L3-4椎间盘与相邻椎体的弯曲力学特性,本文对人体C2-3、T10-11、L3-4椎间盘与相邻椎体进行弯曲试验,为临床提供生物力学参数。实验标本取自正常人新鲜尸体脊柱标本,男性,年龄20～30岁,人死后1h内解剖尸体取出C1-S1脊柱标本,以线锯切取C2-3、T10-11、L3-4椎间盘与相邻椎体各13个标本,在日本岛津电子万能测试机上以5mm/min的实验速度进行弯曲实验,得出C2-3、T10-11、L3-4组标本的最大载荷、最大弯矩、最大应力等力学参数。实验结果得出,C2-3组标本最大载荷、最大弯矩小于T10-11组和L3-4组,有显著性差异(p<0.05);C2-3组标本最大应力小于T10-11组,有显著性差异(p<0.05);L3-4组最大应力大于T10-11组和C2-3组,有显著性差异(p<0.05)。此结果说明C2-3、T10-11、L3-4椎间盘与相邻椎体具有不同的抗弯曲力学特性,可对了解腰椎间盘的损伤机理提供生物力学参。

It is necessary to realize the mechanical properties of the C2 - 3 ,T10 - 11 ,L3 - 4 in order to prevent and treat the herniated disk. So we test the bent experiment of the C2 -3 ,T10 -11 ,L3 -4 taken from the fresh dead bodies and provide biological mechanical data for clinic. The experimental specimens are taken from male fresh corpses of normal people, 20 -30 years old respectively. The CI -S1 spine specimens are taken from the bodies within one hour after death, and the C2 -3 ,T10 - 11 ,L3 -4 intervertebral discs and vertebral bodies are cut by line cutting, each thirteen samples. Do the test on the Japanese shimadzu electronic universal testing aircraft, the experimental speed is 5mm/min, obtain the bending mechanics performance index of maximum load, maximum bending moment, maximum stress of the C2 - 3. T10 - 11, L3 - 4 groups. The maximum load and maximum bending moment of C2 -3 group is less than the T10 - 11 group and the L3 -4 group with a significant difference （p 〈 0.05）. The maximum stress of C2 - 3 group is less than T10 - 11 group, with a significant difference（p 〈 0.05 ）. The maximum stress of L3 - 4 group is greater than the T10 - 11 group and the C2 - 3 group with a significant difference（p 〈 0.05 ）.