TOOTH REPLACEMENT FORMING DEVICE, AND METHOD FOR FORMING A TOOTH REPLACEMENT

• US 20170312059A1
• Filed: 11/12/2015
• Published: 11/02/2017
• Est. Priority Date: 11/14/2014
• Status: Active Grant

• Current Assignee: Ivoclar Vivadent AG
• Original Assignee: Ivoclar Vivadent AG
• Inventors: Burger, Goran
• Granted Patent: US 10,736,719 B2
• Time in Patent Office: Days
• CPC Class Codes: A61C 13/0004 Computer-assisted sizing or machining of dental prostheses
• CPC Class Codes: A61C 13/0006 Production methods
• CPC Class Codes: A61C 13/20 Methods or devices for soldering, casting, moulding or melting A61C13/04, A61C13/081 take precedence
• CPC Class Codes: A61C 13/34 Making or working of models, e.g. preliminary castings, trial dentures; Dowel pins [4]
• CPC Class Codes: A61C 2008/0084 Provisional implants or abutments
• CPC Class Codes: A61C 8/0016 polymeric material
• 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

Abstract

Disclosed is a tooth replacement forming device (10) comprising an abutment on or to which a dental structure made of dental material, especially ceramics, can be fastened. The abutment is mounted on the implant using a detachable connection, in particular a screw connection, the abutment being provided with an implant connection, a collar, and a tubular portion to be connected to the dental structure. The disclosed device (10) is characterized in that a surrounding auxiliary element made of a residue-free material is arranged in such a way as to rest against the tubular portion.

Claims

1. A tooth replacement production device for producing an abutment (14) of a tooth replacement, said abutment (14) comprising an implant connection, a collar (16) and a tubular portion (18) which is intended to be connected with a dental structure (12) of the tooth replacement, characterized in that an auxiliary element (22) abuts on the tubular portion (18) and surrounds the tubular portion and that the auxiliary element (22) is configured of a material which can be removed without leaving any residues.

2. The tooth replacement production device as claimed in claim 1, characterized in that the tubular portion (18) of the abutment (14) ends with a front face (30) which abuts on an inner shoulder of the auxiliary element (22) when the auxiliary element (22) is applied.

3. The tooth replacement production device as claimed in claim 1, characterized in that an inside of the auxiliary element (22) extends flush with an inside of the tubular portion (18).

4. The tooth replacement production device as claimed in claim 1, characterized in that the tubular portion (18) of the abutment (14) comprises a number of recesses, which are engaged with projections of the auxiliary element (22).

5. The tooth replacement production device as claimed in claim 1, characterized in that the auxiliary element (22) in the area overlapping the tubular portion (18), comprises a wall thickness of 0.01 mm to 0.5 mm, which corresponds to an adhesive gap, and that the adhesive gap may be produced by burning out the auxiliary element.

6. The tooth replacement production device as claimed in claim 1, characterized in that the auxiliary element (22) adheres to the tubular portion (18) non-positively and/or positively, wherein the holding force amounts to less than 10 kN and more than 50N.

7. The tooth replacement production device as claimed in claim 1, characterized in that the auxiliary element (22) is configured of a softer, more elastic material than both the dental material and the abutment (14).

8. The tooth replacement production device as claimed in claim 1, characterized in that the auxiliary element (22) comprises greater roughness on its radial external surface than on its radial internal surface.

9. The tooth replacement production device as claimed in claim 1, characterized in that the auxiliary element (22) comprises a tube-shaped portion having a smaller external diameter and a tube-shaped holder portion (24) having a larger external diameter in contrast, and that the tube-shaped portion comprises at least half of the length of the holder portion (24).

10. The tooth replacement production device as claimed in claim 1, characterized in that the abutment (14) comprises a circumferential collar (16) which separates an implant connection and its tubular portion (18), and that the auxiliary element (22) ends at the collar (16), wherein a flange (42) extends beyond the collar (16) at the lower end of the auxiliary element (22) by a small degree.

11. The tooth replacement production device as claimed in claim 1, characterized in that the abutment (14) comprises a cone (34) at the tubular portion (18), having a cone angle of between 0.5°

and 8°

, and that the auxiliary element (22) comprises a matching cone angle at a holder portion (24) and/or has been brought into the matching cone shape when it is pushed onto the tubular portion (18) of the abutment.

12. The tooth replacement production device as claimed in claim 1, characterized in that the auxiliary element (22) may be shortened to a predefined extent consistent with the shortening of the tubular portion (18) of the abutment (14), and comprises corresponding marks.

13. The tooth replacement production device as claimed in claim 1, characterized in that the auxiliary element (22) comprises an anti-rotation protection which extends in an axially parallel manner protruding radially towards the inside and which fits into at least one groove (20) of the tubular portion (18) of the abutment (14) to provide for an anti-rotation mechanism, wherein the auxiliary element (22) comprises an anti-rotation mechanism which protrudes towards the inside and which is configured as a convex-shaped tongue and protrudes radially towards the inside under formation of a convexity.

14. The tooth replacement production device as claimed in claim 1, characterized in that an adhesive bonding and modeling aid is provided which fits into the tubular portion (18) of the abutment (14) and also into the auxiliary element (22) and seals the inner side of the tubular portion (18) by providing a cone (34).

15. The tooth replacement production device as claimed in claim 1, characterized in that the adhesive bonding and modeling aid comprises a conical section which extends into the tubular portion (18) of the abutment (14) without a thread.

16. The tooth replacement production device as claimed in claim 1, characterized in that the auxiliary element (22) comprises a reference surface and/or a scannable mark which and whose position in space may be detected by a scanning device, which forms part of the CAD/CAM device.

18. The tooth replacement production device as claimed in claim 4, wherein the number of recesses are in the form of grooves (20) comprising anti-rotation mechanisms, and wherein the projections match the grooves positively.

19. The tooth replacement production device as claimed in claim 5, wherein the wall thickness is 0.01 mm to 0.06 mm.

20. The tooth replacement production device as claimed in claim 7, wherein the softer, more elastic material comprises a polymer that may be burnt out without leaving any residues.

21. The tooth replacement production device as claimed in claim 10, wherein the flange (42) extends beyond the collar (16) at the lower end of the auxiliary element (22) by 10 mm.

17. Method for the production of a tooth replacement, said tooth replacement being produced using an abutment (14) with a collar (16) and a tubular portion (18) which is intended to be connected with a dental structure (12) of the tooth replacement, characterized in that an auxiliary element (22) is attached to the tubular portion (18), by being pushed onto the tubular portion (18), and that the auxiliary element (22) is used as a basis for the internal shape of the dental structure (12) and is removed without leaving any residues.

22. Method for the production of a tooth replacement as claimed in claim 17, wherein the auxiliary element (22) is removed by heat exposure.