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目的：为经椎弓根螺钉在颈椎的应用提供解剖学基础。方法：用游标卡尺和Ｘ线摄片测量方法，对５４具成年Ｃ３～Ｃ７段干燥颈椎标本椎弓根的高度、宽度、长度、椎弓根轴线的角度及进钉点定位等作了三维形态学观测。结果：颈椎椎弓根的宽度可以接受３．０～４．５ｍｍ的螺钉，进钉深度在２５ｍｍ，进钉方向与上终板平行，并且在Ｃ３～Ｃ６与矢状线的夹角约为４０°～４５°；Ｃ７为３０°～４０°。进钉点定位：Ｃ３～Ｃ６位于颈椎侧块背面的中上１／４水平平分线与中外１／４垂直平分线的交点，Ｃ７位于侧块中垂线与中上１／４水平平分线的交点偏上处。结论：根据不同节段颈椎椎弓根的解剖特点，合理设计椎弓根螺钉的直径和长度，准确选择相应的进钉点和进钉方向，可以保证椎弓根螺钉内固定在下颈椎的安全应用
Objective: To provide anatomical basis for the application of pedicle screw in the cervical spine. Methods: The height, width, length, pedicle axis angle and the location of pedicle screw in 54 adult cervical spine specimens from C3 to C7 were measured by vernier calipers and radiography. The three-dimensional morphology Observation. Results: The width of pedicle of cervical vertebrae was 3.0 ~ 4.5mm, the depth of nailing was 25mm, the direction of nailing was parallel to the upper end plate, and the angle between C3 ~ C6 and sagittal line was about 40 ° ~ 45 °; C7 is 30 ° ~ 40 °. Positioning into the nail point: C3 ~ C6 is located in the back of the lateral cervical vertebra on the 1/4 horizontal bisector and the Chinese and foreign 1/4 vertical bisector of the intersection, C7 is located in the side of the block and the middle of the 1/4 horizontal bisector Point of intersection on the office. Conclusions: According to the anatomical characteristics of cervical pedicle in different segments, the diameter and length of pedicle screw should be properly designed, and the appropriate entry point and direction should be selected correctly to ensure the safe application of pedicle screw fixation in lower cervical spine