PROBLEM TO BE SOLVED: To provide a bone anchoring device capable of firmly anchoring a plate to a fracture part using a screw by adjusting the screw to an angle required by a user without any significant improvement.SOLUTION: A bone anchoring device S includes: a plate 5 including a hole part 10 that has a female screw 10a formed on the inner peripheral surface and connects one surface 2 to the other surface 3, and disposed at the fracture part and a screw 8 including a shaft 8b that is insertable from one surface side into the hole part 10 and insertable into a hole formed in the bone, and a head part 8a in which a male screw 41 to be engaged with the female screw 10a is formed on the outer peripheral surface 40 and that is fixed in the hole part 10. The screw 8 can be multi-axially inserted into the hole part 10 of the plate 5, where the pitch of the female screw 10a is formed different from that of the male screw 41.COPYRIGHT: (C)2015,JPO&INPIT【課題】大幅な改良を加えることなく、ユーザが要求する角度にネジを調整して当該ネジを用いてプレートを骨折部に強固に固定可能な骨固定装置を提供する。【解決手段】内周面に雌ネジ10aが形成され一方の面2と他方の面3とを結合する孔部10を有し、骨折部に配置されるプレート5と、一方の面側から孔部10に挿入可能であって骨に形成される孔に挿入可能な軸8bと、雌ネジ10aと係合する雄ネジ41が外周面40に形成され孔部10に固定される頭部8aと、を有するネジ8と、を備える骨固定装置Sにおいて、ネジ8をプレート5の孔部10に対して多軸方向に挿入可能であって、雌ネジ10aと雄ネジ41のピッチは異なるようにした。【選択図】図8
