本实验采用８具正常成人男性新鲜腰骶段标本，测得腰椎间盘的压缩刚度是１３１４Ｎ／ｍｍ；剪切刚度是２４５Ｎ／ｍｍ；扭转刚度是６．５Ｎｍ／ｄｅｇｒｅｅ；扭转强度是８０．３Ｎ。同时对髓核摘除和后部结构切除后腰椎间盘的刚度和扭转强度变化进行测试，结果显示，髓核摘除和后部结构切除后腰椎间盘的刚度和扭转强度下降，其结果有统计学意义（ｐ＜０．０５），其中后部构切除后扭转刚度下降５１％，扭转强度下降４４％。

The experiment was carried out with 8 normal male adult fresh cadaver lumbar spine specimens being used as functional units.The compressive,shear and torsional stiffness of the lumbar disc were measurfed.The results of measurement showed that the compressive stiffness was 1314N/mm.the shear stiffness 242.5N/mm,the torsional stiffness 6.5Nm/deg.The strength of the lumbar disc was 80.3N.Our experimental results showed that the stiffness and strength of the disc was decreased after the posterior vertebral structures or the nucleus pulposus was removed, after the posterior vertebral structures was removed,of which the torsional stiffness was reduced by 51 percent,the torsional strength was reduced by 44 percent.