| 摘要 |
<p>The present invention can strengthen a coupling capacity of a fixture and alveolar bone, prevent rotations of an abutment with respect to the fixture, and facilitate detachments of the fixture from the mount after fixing the fixture into the alveolar bone, in the upper slanted surface into the alveolar bone, in the upper slated surface of the fixture having first male threads on the outer circumferential surface thereof are formed second male threads having the same pitch as the first male threads and having at least two threads of band-type, and a spiral groove is formed which prevents vacuum formation in the contact surfaces between the fixture on the upper portion of which a slanted groove is formed and the mount having a slanted surface on which the slanted groove is in close contact.</p> |
