| 摘要 |
<p>PURPOSE: To provide a dental implant which can functionally safely fix denture and by which an atraumatic operation can be performed. CONSTITUTION: A dental implant contains a stud part 2 which can be fixed to the jaws, and an excising part 28 to install denture is arranged in a crown side end part of the stud part 2. At least two step parts 18, 20 to 22 are formed toward a root apex-shaped end part 16 on an outside surface of the stud part 2. The dental implant must be improved so that safety of an implantation is improved and an atraumatic operation is realized. At least one of the step parts has screw threads 24 to 26, and in that case, among the adjacent two step parts 21 and 22, a screw thread outside diameter 27 of the step part adjacent to the root apex-shaped end part is substantially not more than a screw thread valley diameter 29 of the step part 21 closer to a head part 4.</p> |
