In 18 patients,in standard anteroposterior position radiographs,17case screws were in inner femoral neck,1 case the screw penatrated femoral neck cortes.

• 临床应用的 18例中 ,17例股骨近端 2枚螺钉在正位X线片上位于股骨颈骨质内 ,1例螺钉穿出股骨颈骨质 ;