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Objective To study the anatomical basis of Dick-operation regarding the top point of the " (?) "shape crest of the lumbar spine as an inserting point of Dick screw. Methods Thirty lumbar specimens and thirty spinal specimens were used for this study to investigate the relationship between the top point of the " (?) " shape crest and the center axle of the vertebral arch and the relationship between the Dick Screw System and the lumbar spine . Results The smaller outer - diameter of every arch is 7.64 ~ 11.83mm.... Objective To study the anatomical basis of Dick-operation regarding the top point of the " (?) "shape crest of the lumbar spine as an inserting point of Dick screw. Methods Thirty lumbar specimens and thirty spinal specimens were used for this study to investigate the relationship between the top point of the " (?) " shape crest and the center axle of the vertebral arch and the relationship between the Dick Screw System and the lumbar spine . Results The smaller outer - diameter of every arch is 7.64 ~ 11.83mm. The space between every other top point of the " (?) " shape crest is 60. 64 -71. 82mm. The screw should been nailed obliquely outward at an angle of 5° ~ 15°in L1~ L4, 15° ~ 20°in L5. The feasible entrance depth is 45. 27 ~ 52. 46mm. The top point of the " (?) " shape crest is on the center axle of the arches or very near it. Conclusion The top point of the " (?) " shape crest is an ideal inserting point of Dick screw. Dick - operation should not only pay attention to the selection of the entrance angle, the entrance depth and the screw diameter, but also the adjustment of the fixed stick. 目的 研究人字嵴顶点进钉法腰椎Dick手术的解剖学基础。方法 在30套成人干燥腰椎标本和30副成人脊柱标本上观测:(1)人字嵴顶点与椎弓根中轴线的关系;(2)腰椎与Dick系统的关系。结果 (1)各腰椎椎弓根较小外径线在7.64~11.83mm之间;(2)人字嵴顶点间距在60.64~71.82 mm之间;(3)进钉角度:L1~L4在5°~15°之间,L5在15°~20°之间;(4)可供进钉深度在45.27~52.46mm之间;(5)人字嵴顶点在椎弓根中轴线上或非常接近中轴线。结论(1)人字嵴顶点是Dick螺钉理想的进钉点;(2)Dick手术不仅要注意进钉角度、进钉深度与螺钉直径的选择,还要注意固定棒的调整。
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