摘要
目的:为耻骨上支逆行拉力螺钉内固定提供解剖学基础。方法:取半骨盆标本30个,选取耻骨上支有代表性的两个截面,第1截面距髂耻隆起1.5cm,第2截面位于耻骨上支远端,采用圆盘法确定截面的圆心及直径,将一斯氏针经2截面的圆心顺行穿出耻骨上支,其出针点P1即为逆行拉力螺钉的入针点。两截面的最小直径即为逆行拉力螺钉的最大直径。将两截面解剖复位,将斯氏针逆行打入,其在耻骨上支内的长度即为逆行拉力螺钉的最大长度,该斯氏针即为耻骨上支的轴心。结果:第1截面呈棱形,直径为(6.8±0.9)mm,第2截面呈扁平状,直径为(5.3±0.3)mm,斯氏针于耻骨上支前端的出针点P1位于耻骨嵴中点下方(7.5±0.5)mm处,斯氏针平行于耻骨梳,斯氏针在耻骨上支内的最大长度为(61.1±9.7)mm。结论:耻骨上支逆行拉力螺钉入钉点位于耻骨嵴中点下方(7.5±0.5)mm,其方向平行于耻骨梳,最大直径为(5.3±0.3)mm,最大长度为(61.1±9.7)mm。
Objective： To provide anatomical basis for the retrograde lag screw internal fixation in the superior ramus of pubis, Methods： Thirty hemipelves were harvested for this study. Two representative cross-sections were selected. The 1st cross-section was 1.5 cm from iliopubic eminence and the 2nd cross-section was at the distal part of the superior ramus of pubis. The center point and diameter of the cross-sections were determined by disc method. A Steinmann pin passing the centers of these two cross-sections was put through the superior ramus of pubis. The exit point （P1） was the entrance point of the retrograde lag screw. The smaller diameter of these two cross-sections was the maximal diameter of the retrograde lag screw. Then the cross-sections were repositioned anatomically, and the Steinmann pin was forced backward with the help of a drill. The functional axis and the maximal length of the retrograde lag screw in the superior ramus of pubis were determined. Results：The 1st cross-section was similar to a rhombus and the diameter was （6.8±0.9） mm. The 2nd cross-section was fiat and the diameter was （5.3±0.3）mm. The exit point（P1） of the Steinmann pin in the front of the superior ramus of pubis was （7.5±0.5）mm under the midpoint of the pubic crest. The Steinmann pin was parallel to the pecten pubis. The length of the Steinmann pin in the superior ramus of pubis was （61.1±9.7）mm. Conclusions： The entrance point of the retrograde lag screw of the superior ramus of pubis was （7.5±0.5）ram under the midpoint of the pubic crest. The direction was parallel to the pecten pubis. Its maximal diameter and maximal length was （5.3±0.3）mm, （61.1±9.7）mm respectively.
出处
《中国临床解剖学杂志》
CSCD
北大核心
2005年第6期617-619,622,共4页
Chinese Journal of Clinical Anatomy
关键词
耻骨上支
拉力螺钉
逆行
内固定
应用解剖
superior ramus of pubis
lag screw
retrograde
internal fixation
applied anatomy
