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目的了解枕骨厚度解剖学与CT两种测量结果的相关性,为枕颈融合术中螺钉长度的选择提供解剖学依据。方法对10具成人湿润颅骨标本进行CT和解剖学测量,测量方法参照McRac线,共66个点,每格相距1cm的矩阵,并对两组数据的相关性进行统计学分析。结果两组数据具有良好的相关性。最厚处位于枕骨粗隆部,最薄处位于小脑窝处,其中厚度大于8mm的区域位于水平线P5、6间ML线旁开2cm、P4、5间ML线旁开1cm及P3、4间ML线处的近似倒三角形区域;厚度介于6～8mm的区域位于上述倒三角形外周1cm的区域。结论各枕骨之间的厚度存在个体差异,CT和解剖学测量结果具有良好的相关性,术前CT测量结果可为术中螺钉长度选择提供参考依据。
Objective To understand the correlation between occipital thickness anatomy and CT and to provide anatomical basis for the selection of screw length in occipitocervical fusion. Methods Ten adult wet skull specimens were measured by CT and anatomical methods. The measurement method was based on the McRac line, a total of 66 points, each matrix was 1cm apart, and the correlation between the two groups of data was statistically analyzed. Results The two groups of data have good correlation. The thickest at the occipital protuberance, the thinnest at the cerebellar fossa, where the thickness of more than 8mm area is located in the horizontal line P5, 6 ML line next to open 2cm, P4,5 ML line aside 1cm and P3,4 ML The approximate inverted triangle area; the thickness of 6 ~ 8mm area is located in the outer circumference of the inverted triangle 1cm area. Conclusion There is individual difference in the thickness of each occiput. CT and anatomical measurement results have good correlation. The results of preoperative CT measurement can provide a reference for the selection of intraoperative screw length.