An objective of the present invention is to form a coupling protrusion and a ratchet protrusion on a bottom part of an abutment, and form the ratchet protrusion in a sawtooth shape while being inclined by a predetermined angle, so as to make the coupling protrusion easily engaged with the coupling groove of the artificial tooth root while removing gum by the ratchet protrusion when the abutment is engaged with the artificial tooth root such that the artificial tooth root and the abutment are easily and surely engaged with each other. To this end, the abutment of an implant, having a crown formed on a top, and a bottom part which is coupled to the coupling groove of the artificial tooth root to provide fixing force, comprises: a body part (110)； an insertion fixing part (120) formed on a top of the body part (110)； a fastening part (130) formed on a bottom part of the body part (110) to be inserted into a coupling groove (1a) of the artificial tooth root (1)； and an insertion coupling hole (140) formed by a predetermined depth at the center of the body part (110) to insert a coupling screw (4) therein in order to provide the fixing force for the artificial tooth root (1). The fastening part (130) includes: the coupling protrusion (132) formed in a shape corresponding to the coupling groove (1a) in order to be inserted into the coupling groove (1a) and maintain an engagement state； and the ratchet protrusion (134) protruding from the coupling protrusion (132) by a predetermined height to be inclined by a predetermined angle (a) to guide insertion to the coupling groove (1a).COPYRIGHT KIPO 2018본 발명은 어버트먼트의 하단부에 결합돌기와 래칫돌기를 구성하고, 상기 래칫돌기를 일정각도 기울어지면서 톱니형상으로 형성하여, 상기 어버트먼트를 인공치근에 교합시킬 때 상기 래칫돌기에 의해 잇몸을 제거시키면서 결합돌기가 인공치근의 결합홈에 용이하게 교합되도록 함으로써, 상기 인공치근과 어버트먼트의 교합이 용이하면서 확고하게 이루어지도록 하는 데 그 목적이 있다. 이를 위해 본 발명은, 상단에 크라운이 구성되고, 하단부가 인공치근의 결합홈에 체결되어 고정력을 발휘하는 임플란트의 어버트먼트에 있어서, 몸체부(110)와； 상기 몸체부(110)의 상단에 구성되는 삽입고정부(120)와； 상기 몸체부(110)의 하단부에 구성되어 인공치근(1)의 결합홈(1a)에 삽입되는 체결부(130)；
