In order (a) to communicate with the crevice and the crevice which the head of abatsutomento which possesses the meneji section the bear are done, paralleling to the center axis, are provided, the keeper itself which consists of the soft magnetic material which possesses the meneji section which possesses the nominal diameter which is larger than the meneji section of abatsutomento and, (b) the meneji section and the spiral shellfish of abatsutomento possess with the small diameter screw which is adjusted and the meneji section of the keeper itself and the spiral shellfish is adjusted two step type screw components which the large diameter screw possess, spiral shellfish conjunction point to the small diameter screw to the meneji section of abatsutomento, in the meneji section of the keeper itself the large diameter screw spiral shellfish conjunctionAfter pointing, when it turns the keeper itself to spiral shellfish arrival direction, the keeper for in plant which features that the keeper itself in abatsutomento securing makes firm by two step type screw components.(a) メネジ部を有するアバットメントの頭部を受承する凹部と、凹部と連通するように中央軸線に沿って設けられ、アバットメントのメネジ部より大きい呼び径を有するメネジ部とを有する軟磁性材料からなるキーパー本体と、(b) アバットメントのメネジ部と螺合する小径ネジ部と、キーパー本体のメネジ部と螺合する大径ネジ部とを有する二段式ネジ部材とを具備し、アバットメントのメネジ部に小径ネジ部を螺合させ、キーパー本体のメネジ部に大径ネジ部を螺合させた後、キーパー本体を螺着方向に回転させると、二段式ネジ部材によりキーパー本体がアバットメントに強固に締着されることを特徴とするインプラント用キーパー。
