髋臼后柱钢板内固定技术的解剖学研究

Clinical anatomic study of internal fixation of acetabular posterior column plate technique

目的研究髋臼后柱钢板内固定技术中螺钉的最佳进钉点、方向和长度，预防螺钉穿人关节内的严重并发症。方法2008年2月至7月取成年男性半骨盆标本20个，制作髋臼后柱系列断面，测量各进钉点的螺钉进钉角度和长度，将测量数据输入到SPSS10．0进行统计学分析。结果各断面在髋臼缘、外中1／4点、中点、内中1／4点和后柱内缘的进钉安全角度分别为39°、57°、74°、90°和106°,螺钉长度分别为39、57、74、90和106mm。结论在髋臼区的外1／4区、外中1／4区、内中1／4区和在内1／4区，钉后柱角分别为40°至60°、60°至75°、75°至90°、90。至平行于四方区，螺钉长度30mm。

Objectives To study the best entry points, direction and length of screw in acetabular posterior column plate technique, and to prevent the serious complications of screw penetrating the joint surface. Methods February to July 2008 20 male cadaveric adult semipelvic specimen were taken. Serial cross-sections of the acetabular posterior column were determined and made. The safe angle of screw entry and the length on all entry points of each cross-section were measured. And put all data into software SPSS 10. 0 for statistics process. Results On margin of acetabulum, lateral-middle 1/4 point, midpoint, medialmiddle 1：/4 point and medial margin of posterior column of each cross-section, safe entry angle of inclination was 39° ,57°, 74°, 90° and 106° respectively, the length of the screw was 39, 57, 74, 90 and 106 mm respectively. Conclusion On lateral 1/4 region, lateral-middle 1：/4 region, medial-middle 1/4 region and medial 1：/4 region, screw posterior column angle is 40°to 60°, 60°to 75°, 75°to 90°, 90°to parallel to the quadrilateral plate, and the length of the screw is 30 mm.