Internal connection dental implant

• US 20050287497A1
• Filed: 06/29/2004
• Published: 12/29/2005
• Est. Priority Date: 06/29/2004
• Status: Active Grant

• Current Assignee: Keystone Dental Incorporated
• Original Assignee: Lifecore Biomedical Incorporated
• Inventors: Carter, Robert D.
• Granted Patent: US 7,249,949 B2
• Time in Patent Office: Days
• US Class Current: 433/173
• CPC Class Codes: A61C 8/005 Connecting devices for joining an upper structure with an implant member, e.g. spacers
• CPC Class Codes: A61C 8/0054 having a cylindrical implant connecting part
• CPC Class Codes: A61C 8/0066 with positioning means A61C8/006 takes precedence
• CPC Class Codes: A61C 8/0068 with an additional screw
• CPC Class Codes: A61C 8/0069 tapered or conical connection
• CPC Class Codes: A61C 8/0071 with a self-locking taper, e.g. morse taper

Abstract

An internal connection dental implant and implant assembly in which the implant includes a lobed configuration for installing the implant and a beveled surface positioned on the proximal side of the lobed configuration for providing stability between the implant and a corresponding abutment.

Claims

1. A dental implant comprising:

a body having a longitudinal axis, a distal end and an open proximal end;

implant retaining means provided on an external portion of said body;

an internal bore provided within a portion of said body, said internal bore having a proximal end at the open proximal end of said body and a distal end;

a first portion of said internal bore comprising an internally facing surface having a proximal end and a distal end, said surface extending from near the proximal end of said internal bore toward the distal end of said internal bore, said surface being beveled inwardly toward its distal end at an angle of about 8°

to about 40°

relative to said longitudinal axis;

a second portion of said internal bore comprising an internally facing drive region positioned between the distal end of said surface and the distal end of said internal bore; and

a third portion of said internal bore comprising an internally threaded region positioned within said drive region and the distal end of said internal bore.

2. The dental implant of claim 1 wherein said surface is a substantially frustoconical surface beveled toward its distal end at an angle of about 8°

to about 30°

.

3. The dental implant of claim 2 wherein said surface is beveled toward its distal end at an angle of about 8°

to about 20°

.

4. The dental implant of claim 1 wherein said surface is a substantially frustoconical surface having a diametrical dimension at its proximal end and a length dimension, said diametrical dimension being measured in a direction perpendicular to said longitudinal axis and said length dimension being measured in a direction parallel to said longitudinal axis, wherein said length dimension ranges from about 15% to about 40% of said diametrical dimension.

5. The dental implant of claim 4 wherein said length dimension ranges from about 15% to about 25% of said diametrical dimension.

6. The dental implant of claim 5 wherein said surface is beveled toward its distal end at an angle of about 8°

to about 20°

.

7. The dental implant of claim 1 wherein said internal wrench engaging portion includes a plurality of concave lobes and a plurality of convex lobes alternating with said concave lobes, the radially outermost points of each of said concave lobes lying on a circle defining a major diameter and the radially innermost points of each of said convex lobes lying on a circle defining a minor diameter.

8. The dental implant of claim 7 wherein a portion of each of said concave lobes has a circular configuration and a portion of each of said convex lobes has a circular configuration.

9. The dental implant of claim 7 wherein said minor diameter is about 60% to about 90% of said major diameter.

10. The dental implant of claim 7 wherein a portion of each of said concave lobes has an elliptical configuration and a portion of each of said convex lobes has an elliptical configuration.

11. The dental implant of claim 7 wherein said each of plurality of concave lobes is of the same size and configuration as each of said plurality of convex lobes.

12. The dental implant of claim 4 wherein said internal wrench engaging portion includes a plurality of concave lobes and a plurality of convex lobes alternating with said concave lobes, the radially outermost points of each of said concave lobes lying on a circle defining a major diameter and the radially innermost points of each of said convex lobes lying on a circle defining a minor diameter and wherein said major diameter is about 60% to about 90% of said diametrical dimension.

19. The combination of a dental implant of claim 1 and an abutment connectable to said implant wherein said abutment has a proximal end and a distal end and comprises:

a first abutment surface engaging said surface when said dental implant and said abutment are connected;

a second abutment surface corresponding to and adjacent to said drive region when said dental implant and said abutment are connected;

a prosthesis mounting portion;

a central bore extending through at least a portion of said prosthesis mounting portion and to the distal end of said abutment; and

an abutment screw extending through said central bore and into said internally threaded bore when said dental implant and said abutment are connected.

13. A dental implant comprising:

a body having a longitudinal axis, a proximal end and a distal end;

implant retaining means provided on an external portion of said body;

an internal bore provided within a portion of said body, said internal bore having a proximal end at the proximal end of said body and a distal end;

an internally facing surface having a proximal end and a distal end, said surface extending from near the proximal end of said internal bore toward the distal end of said internal bore, said surface being beveled inwardly toward its distal end;

an internally facing drive region positioned within said internal bore between the distal end of said surface and the distal end of said internal bore, said drive region including a plurality of concave lobes and a plurality of convex lobes alternating with said concave lobes, the radially outermost points of each of said convex lobes lying on a circle defining a major diameter and the radially innermost points of each of said concave lobes lying on a circle defining a minor diameter, said plurality of concave lobes being of the same size and configuration as said plurality of convex lobes; and

an internally threaded portion positioned within said internal bore and between said drive region and the distal end of said body.

14. The dental implant of claim 13 wherein a portion of each of said concave lobes has a circular configuration and a portion of each of said convex lobes has a circular configuration.

15. The dental implant of claim 13 wherein a portion of each of said concave lobes has an elliptical configuration and a portion of each of said convex lobes has an elliptical configuration.

16. The dental implant of claim 13 wherein said minor diameter is about 60% to about 90% of said major diameter.

17. The dental implant of claim 13 wherein said surface is a substantially frustoconical surface beveled toward its distal end at an angle of about 8°

to about 30°

relative to said longitudinal axis.

18. The dental implant of claim 17 wherein said surface is beveled toward its distal end at an angle of about 8°

to about 20°

relative to said longitudinal axis.