Patent ID: 8177556

Claim:
An apparatus comprising: a main body portion coupled to a fixture for implantation into an alveolar bone, the main body portion having an inclined section that is inclined such that at least a part of a gum contact portion is adapted to contact a gum, the gum contact portion having an outer diameter that decreases from a lower end toward an upper end; and a coupling portion integrally formed with the main body portion to detachably couple the main body portion to the fixture, wherein a tool hole is formed in an upper end portion of the main body portion having a predetermined depth from an upper surface of the main body portion, wherein the tool hole comprises: a screw portion where threads are formed in a third predetermined length section so that an impression coping is detachable; and a tool latch portion arranged close to the screw portion so that a tool is inserted in the tool latch portion, wherein the inclined section comprises a concave surface having a predetermined inward curvature in a radial direction from an outer surface of the main body portion, and wherein a topmost corner of an upper end portion of the main body portion is rounded.