髋臼后柱拉力螺钉内固定技术的临床解剖研究

Clinical Anatomic Study of Acetabular Posterior Column lag Screw Technique in Internal Fixation

目的：研究髋臼后柱拉力螺钉内固定技术中螺钉的最件进钉点、方向和长度。方法：取成年刃性髋骨标本20个，制作髋臼后住系列断面。测量进钉点与骨盆弓状线（OP）之距离，骶髂关节前端至P点间之距离（PQ），螺钉进入的长度，螺钉打入时的内倾角和前倾角；将测量数据输入到SPSS10.0进行统计学分析。结果：OP和PQ的距离分别为（16.8±2.1）mm和（23.5±3.4）mm，螺钉长度为（94.8±4.2）mm，螺钉内倾角17°18′±2°32′，前倾角57°36′±4°28′。结论：髋臼后柱拉力螺钉内匮I定技术具有创伤小、固定强度大等优点，在某些髋臼骨折中膀用具有明显的优势。

Objective：To investigate the best entry point, direction and length of screw in acetabular posterior column lag screw technique. Methods： Twenty male hip bone speeimens in adults were adopted to make serial cross - sections of acetabular posterior colunm. To detect the distances between entu point to linea areuata of pelvis minor （OP）, P point and anterior extremity nf sacroiliac joint （PQ）, and then to measure length of the inserted lag screw; the introverted and anteverted angle when a screw was inserted. These measured data were put into the SPSS 10.0 for statistical analysis. Results：The mean lengths of OP, PQ and inserted lag screw are （16.8±2.1） mm, （23.5±3.4） mm and （94.8±4.2） mm, respectively. The mean introverted and anteverted angle of screws are 17°18′±2°32′ and 57°36′±4°28′. Conclusions：The acetabular posterior column lag screw technique has advantages of little damage, high - intensity fixation, and so on. It has notable superiority in the treatment of ｜he fractures of aeetabulum.