Dental implant system
View Patent ↗An implant comprising two internal anti-rotational features. One anti-rotational feature is adapted to engage a driving tool, while the other anti-rotational feature is adapted to engage an abutment. An implant abutment system is provided with an angled abutment adapted to mate with one of the anti-rotational features. A second, straight abutment is adapted to engage with the other anti-rotational feature. An abutment is provided with resilient fingers to interface with the implant and provide tactile and audible feedback indicating when the abutment is properly seated. An abutment screw extends through the abutment and engages the implant bore distal of the stem of the abutment. The abutment screw limits axial movement of the abutment relative to the implant. A driving tool comprising one of at least retention structure and visual alignment indicia is provided to facilitate screwing the implant into a patient's bone.
1. 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.
2. The system of claim 1 , wherein the abutment further includes an external tapering section located outside the dental implant, the external tapering section extending from a margin surface of the abutment that engages an uppermost surface of the implant, the external tapering surface tapering away from the margin surface.
3. The system of claim 2 , wherein the stem of the abutment further includes a base section that extends downwardly from the margin surface, the base section fitting within the internal bore of the implant.
4. The system of claim 3 , wherein the base section includes a chamfered surface.
5. The system of claim 4 , wherein the base section is directly above the hexagonal anti-rotational section.
6. The system of claim 2 , wherein the post has a surface tapering inwardly from the external tapering section.
7. The system of claim 1 , wherein the tapering section of the stem includes a curved surface leading from the six surfaces into the cylindrical section.
8. The system of claim 7 , wherein the curved shape for a lowermost boundary for each of the six surfaces of the hexagonal anti-rotational section is arranged such that a lowermost portion of each of the six surfaces is located at approximately a middle of each of the six surfaces.
9. The system of claim 8 , wherein the stem of the abutment further includes a base section that extends downwardly from a margin surface that engages an uppermost surface of the dental implant, the base section fitting within the internal bore of the implant.
10. The system of claim 9 , wherein an uppermost portion of each of the six surfaces of the hexagonal anti-rotational section is located adjacent to the base section.
11. The system of claim 1 , wherein the abutment is a unitary member.
12. A dental abutment system to be used with a dental implant having 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, a cylindrical section, and a plurality of resilient fingers below the cylindrical section for providing feedback indicating when the abutment is fully seated in the implant, 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.
13. The system of claim 12 , wherein the abutment further includes an external tapering section located outside the dental implant, the external tapering section extending from a margin surface of the abutment that is configured to engage an uppermost surface of the implant, the external tapering surface tapering away from the margin surface.
14. The system of claim 13 , wherein the stem of the abutment further includes a base section that extends downwardly from the margin surface, the base section fitting within the internal bore of the implant.
15. The system of claim 14 , wherein the base section includes a chamfered surface.
16. The system of claim 15 , wherein the base section is directly above the hexagonal anti-rotational section of the stem.
17. The system of claim 13 , wherein the post is above the external tapering section and has a surface tapering inwardly away from the external tapering section.
18. The system of claim 12 , wherein the tapering section of the stem includes a curved surface leading from the six surfaces into the cylindrical section.
19. The system of claim 18 , wherein the curved shape for a lowermost boundary for each of the six surfaces of the hexagonal anti-rotational section is arranged such that a lowermost portion of each of the six surfaces is located at approximately a middle of each of the six surfaces.
20. The system of claim 19 , wherein the stem of the abutment further includes a base section that extends downwardly from a margin surface that is to engage the uppermost surface of the implant, the base section fitting within the internal bore of the implant.
21. The system of claim 20 , wherein an uppermost portion of each of the six surfaces of the hexagonal anti-rotational section is located adjacent to the base section.
22. The system of claim 12 , wherein the abutment is a unitary member.