A compression screw comprising a shaft that can be extended, the shaft having a proximal end and a distal end, the proximal end of the shaft including a bone engaging mechanism, and a distal end of the shaft Includes a distal thread, the proximal end of the shaft includes a drive mechanism for rotating the shaft, and a force is generated by inserting a compression screw into the bone across the fracture line, the force being After the shaft has been inserted into the bone, the shaft will try to shrink to its original non-stretched state, thereby compressing across the fracture line. A compression screw that creates and maintains.圧縮ねじであって、伸長させることができる軸部を含み、軸部は近位端及び遠位端を有し、軸部の近位端は骨係合機構を含み、軸部の遠位端は遠位ねじ山を含み、軸部の近位端は軸部を回転させるための駆動機構を含み、圧縮ねじを骨折線と交わるように骨に挿入することにより力が生成され、力は軸部をその弾性限界未満まで伸長させる応力を軸部に生成し、軸部が骨に挿入された後、軸部はその元の非伸長状態まで縮もうとし、それにより骨折線を横切って圧縮を生成し且つ維持する圧縮ねじ。
