| 摘要 |
A dental implant for supporting and positioning an artificial tooth or other prosthetic device in the mouth, and preventing its rotation is provided. The dental implant is adapted to be installed in a pre-drilled bore in the bone of the maxilla or mandible and is eseointegrated into the bone. The dental implant has a generally cylindrical body with a first end implanted in the bone and second end including an annular base. The cylindrical body also includes a threaded bore extending from the second end into the cylindrical body along the longitudinal axis of the cylindrical body. A hexagonal shaped protrusion, when viewed along the bore of the cylinder, is integrally attached to and extends away from the annular base. The central bore of the cylinder extends concentrically through both the annular base and the hexagonal protrusion. The hexagonal protrusion will mate with a corresponding shaped female recess in an abutment which supports and positions an artificial tooth or other prosthetic device above the gum material located above the bone. The abutment rests on both the annular base and the hexagonal projection. This mating relation prevents the abutment from rotating around hexagonal projection and thereby maintains the orientation of the abutment and corresponding artificial tooth or prosthetic device within the mouth. Although a hexagonal shaped protrusion is used in the preferred embodiment, any shape protrusion and corresponding shaped female recess which, when in mating contact, prevents the abutment form rotating around the male projection is within the scope of the invention.
|
