Dental implant system

A dental implant system, comprising:

• a dental implant comprising,
• a proximal end,
• an externally threaded exterior surface located below the proximal end, and
• an internal bore extending distally from the proximal end, the internal bore including a first anti-rotation section having a hexagonal cross-sectional shape, a second anti-rotation section having a 12-sided polygonal cross-sectional shape, and a threaded section, the second anti-rotation section being located between the first anti-rotational section and the threaded section, the second anti-rotation section being distinct from and having a smaller diametric dimension than the first anti-rotation section;
• an abutment for attachment to the dental implant comprising,
• a post section that extends above the dental implant and is configured to support a prosthesis,
• a stem section that extends into the internal bore of the implant, the stem section including a hexagonal anti-rotational section, a tapering section, and a cylindrical section, the tapering section is located between the hexagonal anti-rotational section and the cylindrical section, the cylindrical section having a smaller diametric dimension than the hexagonal anti-rotational section, the hexagonal anti-rotational section being defined by six surfaces and rotationally locking with the first anti-rotation section of the dental implant, the cylindrical section fitting within the second anti-rotational section of the dental implant, the tapering section having a surface that tapers downwardly from the hexagonal anti-rotational section to the cylindrical section so as to cause a lower boundary for each of the six surfaces to have a curved shape, and
• a through-bore extending the post section and the stem section, the through-bore being partially defined by an internal shoulder integrally formed within the abutment;
• and
• a screw for axially retaining the abutment on the dental implant, the screw having a head and a threaded portion, the screw passing through the through-bore such that the head engages the internal shoulder and the threaded portion threadably engages the threaded section of the internal bore of the dental implant.

A dental abutment system to be used with a dental implant comprising a proximal end, an externally threaded exterior surface, and an internal bore, the externally threaded exterior surface located below the proximal end, the internal bore extending distally from the proximal end, the internal bore including a first anti-rotation section having a hexagonal cross-sectional shape, a second anti-rotation section having a 12-sided polygonal cross-sectional shape, and a threaded section, the second anti-rotation section being located between the first anti-rotation section and the threaded section, the second anti-rotation section being distinct from and having a smaller diametric dimension than the first anti-rotation section, the dental abutment system comprising:

• an abutment for attachment to the dental implant, the abutment comprising,
• a post section that extends above the dental implant when assembled and is configured to support a prosthesis,
• a stem section for extending into the internal bore of the implant, the stem section including a hexagonal anti-rotational section, a tapering section, and a cylindrical section, the tapering section is located between the hexagonal anti-rotational section and the cylindrical section, the cylindrical section having a smaller diametric dimension than the hexagonal anti-rotational section, the hexagonal anti-rotational section being defined by six surfaces and for rotationally locking with the first anti-rotation section of the dental implant, the cylindrical section for fitting within the second anti-rotational section of the dental implant, the tapering section having a surface that tapers downwardly from the hexagonal anti-rotational section to the cylindrical section so as to cause a lower boundary for each of the six surfaces to have a curved shape, and
• a through-bore extending the post section and the stem section, the through-bore being partially defined by an internal shoulder integrally formed within the abutment;
• and
• a screw for axially retaining the abutment on the dental implant, the screw having a head and a threaded portion, the screw, when assembled, passing through the through-bore such that the head engages the internal shoulder and the threaded portion threadably engages the threaded section of the internal bore of the dental implant.