Methods: The lag screws of dynamic hip screw implants were inserted and subsequently remoed in 8 matched pairs of cadaeric, osteoporotic femurs to create a femoral neck defect.

• 方法：在8对配对尸体的有骨质疏松的股骨中植入动力髋螺钉系统的拉力螺钉（主钉），然后再取出已造成一股骨颈骨缺损。