Abstract: A dental implant is provided having a longitudinal axis, and comprising an elongate body portion at an apical portion of the implant and a neck portion at a coronal portion of the implant. A first helical thread profile is around a first portion of the elongate body, at the apical portion. A second helical thread profile that is different from the first helical thread profile, is around a second portion of the elongate body that is between the first portion and the neck portion. The implant further comprises a third helical thread profile that is around the neck portion and that is different from both the first and second helical thread profiles. Other applications are also described.

Abstract: A dental abutment includes a projection for insertion into a cavity in the coronal portion of a dental implant. A coronal surface of the projection is adapted to be substantially flush with a coronal end of the implant when the projection is fully inserted into the cavity. A post extends in a substantially coronal direction from the coronal surface, wherein the perimeter of the post at the coronal surface is smaller than the perimeter of the coronal surface so as to form an indented shelf around the perimeter of the coronal surface.