It includes Ping Tai Bu With screw parts that Yi Seed self-tapping type bone Nail improvement Agencies, which makes , Qi Department, The platform parts for hand Move Gong Ju Jin Hang Xuan Lock operations, and, the fixation of Bomb elements is provided. The screw parts are divided into the first spiral shell conjunction the second spiral shells of District With and close District, and the first spiral shells of The close and form spiral shell Pattern on the spiral shell Rod that the second spiral shells of District With conjunction equal what Round Trail Department of District increase to upper Getting from small to large, the second spiral shell conjunction mono- cutting ends the ends District As, at least have a blade person on cutting end. Thereby, The bones Nail Ke Da are to screwing togather easy, the good Gifted Dot of polarization.一種自攻式骨釘改良構造,其係包含有平台部與螺合部,該平台部可供手動工具進行旋鎖作業,以及,提供彈性元件的固定。該螺合部分成第一螺合區與第二螺合區,該第一螺合區與第二螺合區均於圓徑係由小至大向上漸增的螺桿上形成螺紋,第二螺合區末端為一切削端,切削端上至少具有一刃部者。藉此,該骨釘可達到螺合容易、定位性佳之優點。
