C3-4、T9-10、L2-3椎间盘与相邻椎体弯曲(屈曲)的力学特性

摘要

To do the bending (bucking) experiment with normal Chinese fresh cadaveric between C3-4、T9-10、L2-3 intervertebral disc and the adjacent vertebral body,analyze bending (bucking) and mechanical properties between C3-4,T9-10,L2-3 disc and the adjacent vertebral body,and to determine whether the different parts of the disc and the adjacent vertebral mechanical properties of different bending (bucking).The C3-4,T9-10,L2-3 disc and the adjacent vertebral specimens each of 13 were taken,and then the bending (bucking) experiments on electronic universal testing machine were done.The experimental data were dealed with statistical analysis and t test.The results showed that the maximum load,maximum bending moment,and the maximum stress of C3-4,T9-10,L2-3 groups were greater than that of the C3-4,T9-10 groups,significant difference (P ＜ 0.05),The maximum load,maximum bending moment,and the maximum stress of T9-10 group were larger than that of the C3-4 group,significant difference (P ＜ 0.05).Bending of C3-4,T9-10,L2-3 disc and the mechanical properties of adjacent vertebral body specimens (bucking) have a certain difference,the larger the cross-sectional area is,the bigger the bearing maximum load and maximum stress are,but they are not directly proportional relationship.%对正常国人新鲜尸体C3-4、T9-10、L2-3椎间盘与相邻椎体进行弯曲(屈曲)实验,分析C3-4、T9-10、L2-3椎间盘与相邻椎体的弯曲(屈曲)力学性质,确定不同部位的椎间盘与相邻椎体是否具有不同的弯曲(屈曲)力学性质.取C3-4、T9-10、L2-3椎间盘与相邻椎体标本各13个,以电子万能试验机进行弯曲(屈曲)实验.以统计学分析和t检验的方法处理实验数据.结果表明,L2-3组最大载荷、最大弯距、最大应力大于C3-4、T9-10组,差异显著(P＜0.05),T9-10组最大载荷、最大弯距、最大应力大于C3-4组,差异显著(P＜0.05).C3-4、T9-10、L2-3椎间盘与相邻椎体标本的弯曲(屈曲)力学性质有一定区别,标本的横截面积越大,承受的载荷和应力越大,但不成正比关系.