摘要
目的：研究颈椎终板的解剖结构及其抗压强度。方法：应用直接法测量１０具新鲜成人尸体颈椎标本的终板厚度。标本切片进行光镜观察。生物力学测试比较保留终板和不保留终板时，其抗压强度及椎体植骨面的位移。结果：各节段颈椎终板和上、下终板之间的厚度差异均无显著性（Ｐ＞０．０５），终板中央区为多孔的松质骨样结构，平均厚度为０．５１±０．０３ｍｍ。保留终板组与不保留终板组的抗压强度分别为１３６０．２±２５６．３Ｎ和８７７．１±１６７．３Ｎ，差异非常显著。其椎体植骨面位移分别为１．１４±０．５９ｍｍ和２．３５±０．７５ｍｍ，差异亦非常显著。结论：保留终板能显著增加颈椎椎体的抗压强度。
Objective:To study the anatomical structure and compressive stiffiness of the cervical vertebral endplate.Methods:The thickness of the endplates was estimated by direct measurement from 10 fresh human cadaver cervical spine specimens.The sections through the specimens were examined under light microscope.In a biomechanical test,the compressive stiffness and displacement of bone graft area of cervical vertebra were compared in the endplate group and in the control group.Results:The thickness of the endplate had no significant difference among each of cervical vertebrae and between its superior and inferior endplate ( P >0.005).The central region of the endplate was porous,as the fused trabeculae.Its average thickness was 0.51±0.03 mm.The compressive stiffness in the endplate group and in the control group were 1360.2±256.3 N and 877.1±167.3 N respectively.The difference was significant ( P <0.01).The displacement of bone graft area of cervical vertebra in the endplate group and control group were 1.14±0.59 mm and 23.5 ±0.75 mm respectively.The difference was also significant.Conclusions:Preserving endplate could increase the compressive stiffiness and reduce the displacement of bone graft area of cervical vertebra significantly.
出处
《中国临床解剖学杂志》
CSCD
北大核心
1999年第2期172-174,共3页
Chinese Journal of Clinical Anatomy
基金
全军归国留学人员启动基金
关键词
颈椎终板
生物力学
解剖学
Cervical vertebral endplate Anatomy Biomechanics
