Dental implant structure

A tooth implant structure comprising:

• a fixture fixed to an alveolar bone;
• an abutment coupled to the fixture and configured to attach an artificial tooth thereto;
• and
• a coupling element configured to couple the fixture and the abutment to each other,
• wherein the fixture includes a lower fixture portion fixed to the alveolar bone and an upper fixture portion coupled to the abutment, a first thread is formed on a part or all of a surface of the lower fixture portion so as to be fixed to the alveolar bone, the lower fixture portion has a shape extending along a rotation axis of the first thread, a second thread is formed on a part or all of a surface of the upper fixture portion, and the upper fixture portion has a shape extending along a rotation axis of the second thread,
• wherein the abutment includes an inner cavity into which the upper fixture portion is inserted from a lower end thereof, and an artificial tooth attachment surface provided on an outer surface thereof,
• wherein the coupling element includes therein a third thread coupled to the second thread on the upper fixture portion, and has a shape extending along a rotation axis of the third thread,
• wherein a part or all of the coupling element is inserted into the cavity of the abutment and a part or all of a circumferential surface of the coupling element is in contact with a circumferential surface of the cavity of the abutment,
• wherein the third thread of the coupling element and the second thread of the upper fixture portion are coupled to each other and a part or all of the abutment is placed between the coupling element and the fixture in the direction of the rotation axis of the second thread, and
• wherein the coupling element is configured to press the abutment toward the lower fixture portion by coupling of the third thread and the second thread, and the upper fixture portion is provided with a surface configured to support the abutment against pressing of the coupling element so as to fix the abutment to the fixture.