前路经枢椎体至寰椎侧块螺钉内固定的解剖学基础

Anatomical basis study of anterior screw fixation from C2 vertebral body into lateral mass of atlas

目的 为临床行前路枢椎体至寰椎侧块螺钉固定方法提供实验依据。方法 用游标卡尺测量21例(42侧)C1和C2成人骨标本,计算出前路经枢椎体至寰椎侧块 螺钉内固定术中螺钉走向的最小、最大外偏角和最大后倾角。结果在前路经枢椎体 至寰椎侧块螺钉内固定术中螺钉的最小外偏角为14°±1．6°,最大外偏角为30°±2．3°, 最大后倾角为29°±2．9°,左、右侧无明显统计学差异(P>0．05)。结论 前路经枢椎体至 寰椎侧块螺钉内固定是安全可行的。

Objective To provide the anatomical data for anterior approach screw fixation through C2 vertebral body to lateral mass of C1. Methods 21 atlas and axis vertebral specimens were measured,and calculate minimus lateral angle,maximum lateral angle and maximum posterior incline angle. Results Minimus lateral angle 14°±1.6°,maximum lateral angle 30°±2.3°,maximum posterior incline angle 29°±2.9°.no significance existed between right and left （P〉0.05）. Conclusion Anterior approach screw fixation from C2 vertebral body into lateral mass of atlas is reliable and secure.