A dental implant is disclosed. The dental implant of the present invention includes a fixture that is placed in a gum bone； An insertion part inserted into the fastening groove of the fixture, a protrusion protruding upwards of the fixture, and a through hole penetrating the insertion part and the protrusion, and the protrusion extends its circumferential direction so that it can be extended outward by an external force. Accordingly, a plurality of cut-out holes are provided to be spaced apart from each other, and a first thread is formed on an inner circumferential surface thereof； An artificial tooth coupled to the protrusion to surround the outside of the protrusion of the abutment； A first fixing screw that is inserted into the through hole and has one end coupled to the fixture to fix the abutment with respect to the fixture； And a second fixing screw that is screwed to the first thread of the abutment and has a second thread formed to expand the protrusion outward, and is inserted into the artificial tooth to fix the artificial tooth with respect to the abutment. It characterized in that it comprises a. According to the present invention, the protrusions of the abutment are composed of a plurality of spaced apart in the circumferential direction, and a second fixing screw is screwed inside the protrusion so that the protrusion is expanded by the tensile force generated during the coupling so that it is in close contact with the inner surface of the artificial tooth. , It can increase the bonding strength of the abutment and the artificial tooth.치과용 임플란트가 개시된다. 본 발명의 치과용 임플란트는, 잇몸 뼈에 식립되는 픽스쳐； 상기 픽스쳐의 체결홈에 삽입되는 삽입부, 상기 픽스쳐 상부로 돌출되는 돌출부 및 상기 삽입부와 돌출부를 관통하는 관통홀을 포함하며, 상기 돌출부는 외력에 의해 일정 이상 외측으로 확장 가능하도록 그 원주 방향을 따라 서로 이격되게 복수의 절개홀이 마련되고 그 내주면에 제1 나사산이 형성되는 어버트먼트； 상기 어버트먼트의 돌출부 외측을 감싸도록 상기 돌출부에 결합되는 인공치아； 상기 관통홀에 삽입되어 일단부가 상기 픽스쳐에 결합됨으로써 상기 픽스쳐에 대해 상기 어버트먼트를 고정하는 제1 고정 스크루； 및 상기 어버트먼트의 제1 나사산에 나사 체결되어 상기 돌출부를 외측으로 확장시키도록 제2 나사산이 형성되며, 상기 인공치아 내측으로 삽입되어 상기 어버트먼트에 대해
