< Topic >Easily to cut to remove it is possible the callous which was formed to the head of the medical application screw. SolutionsOnly medical application 10 is formed from grip section 10of a T letter condition and stick body section 10b and blade section 10c, plural blade sections 10c which possess the angular section with the thin tongue flakiness are arranged in the point of stick body section 10b according to circumferential direction. It can use to blade section 10c the metal which possesses bullet occurrence and restoration characteristic, this touches to the head of the screw, by the fact that you push it spreads outside. In order to peel the callous from circumferential direction by the fact that it turns the blade section 10c which spread outside this, it becomes possible, to dig, it is possible to remove the callous which was formed to the head of the screw efficiently. < Selective figure >Figure 1【課題】医療用スクリューの頭部に形成された仮骨を容易に切削除去することができる。【解決手段】医療用のみ10はT字状の把持部10aと、棒体部10bと、刃部10cとから構成され、薄い舌片状で角部を有する複数個の刃部10cが棒体部10bの先端部に円周方向に沿って配置されている。刃部10cには弾発性及び復元性を有する金属が用いられ、スクリューの頭部に当接し、押し付けることで外側に広がる。この外側に拡がった刃部10cを回転させることで円周方向から仮骨を剥がすように掘削することが可能となり、スクリューの頭部に形成された仮骨を効率的に除去することができる。【選択図】図1
