Dental prosthesis with threaded crpwn on post and core

• US 20180140391A1
• Filed: 04/07/2016
• Published: 05/24/2018
• Est. Priority Date: 05/22/2015
• Status: Active Grant

• Current Assignee: Sweden & Martina SpA
• Original Assignee: Sweden & Martina SpA
• Inventors: Rodriguez Ciurana, Javier A., Segala Torres, Isabel, Vela Nebot, Javier
• Granted Patent: US 10,507,086 B2
• Time in Patent Office: Days
• CPC Class Codes: A61C 2008/0046 Textured surface, e.g. roughness, microstructure A61C8/0013 takes precedence
• CPC Class Codes: A61C 5/30 Securing inlays, onlays or crowns
• CPC Class Codes: A61C 5/70 Tooth crowns; Making thereof
• CPC Class Codes: A61C 8/0048 Connecting the upper structure to the implant, e.g. bridging bars A61C8/0028 takes precedence
• CPC Class Codes: A61C 8/0054 having a cylindrical implant connecting part
• CPC Class Codes: A61C 8/0068 with an additional screw
• CPC Class Codes: A61C 8/0069 tapered or conical connection
• CPC Class Codes: A61C 8/0078 with platform switching, i.e. platform between implant and abutment

Abstract

A dental prosthesis with a threaded crown on a post and core includes a dental implant, a post and core having a portion adapted to be inserted into the implant and another portion protruding from the implant, a screw and a crown, the implant being adapted to be fixed to a bone and the post and core being adapted to be fixed to the implant with a thread, the crown being fixed to the post and core with the screw, wherein the post and core provides a connection element between the implant and the crown, a separation area being provided between the area where the post and core is housed in the crown and the area where the post and core is housed in the implant, and wherein the portion of the post and core protruding from the implant does not feature a diameter increase.

Claims

1. A dental prosthesis with threaded crown on a post and core, comprising:

a dental implant;

a post and core comprising a first portion adapted to be inserted into said implant and a second portion protruding from said implant;

a screw; and

a crown,

said implant being adapted to be fixed to a bone and said post and core being adapted to be fixed to said implant through a thread,

wherein said crown is fixed to said post and core with said screw,

wherein said post and core operates as a connection element between said implant and said crown, a separation area being provided between an area where the post and core is housed in the crown and an area where the post and core is housed in the implant, and

wherein said second portion of the post and core protruding from said implant does not feature any increase in diameter.

2. The dental prosthesis according to claim 1, wherein said post and core comprises, within the first portion, a hole provided with a thread and adapted to accommodate said screw that fixes the crown to the post and core.

3. The dental prosthesis according to claim 1, wherein said post and core is comprises a first element and a second element, the first element being hollow element and the second element comprising a through screw that is inserted in said first hollow element and is fixed to the implant, said through screw comprising a hole provided with a thread suited to accommodate said screw that fixes the crown to the post and core.

4. The dental prosthesis according to claim 1, wherein the diameter of said second portion of the post and core protruding from said implant converges in a continuous manner from said implant towards the crown.

5. The dental prosthesis according to claim 3, wherein the second portion of the post and core that protrudes from said implant comprises one or more cylindrical segments longer than 0 mm and equal to or shorter than 3 mm extending from said implant towards the crown.

6. The dental prosthesis according to claim 5, wherein the second portion of the post and core that protrudes from said implant comprises at least one cylindrical segment having a length comprised between 0 mm and 3 mm and extending from said implant towards the crown.

7. The dental prosthesis according to claim 6, wherein the diameter of said second portion of the post and core protruding from said implant converges in a continuous manner from an end of a first cylindrical segment of the post and core towards the crown.

8. The dental prosthesis according to claim 4, wherein the diameter converges with an angle of convergence included between 1°

and 8°

.

9. The dental prosthesis according to claim 8, wherein the diameter converges with an angle of convergence included between 2°

and 5°

.

10. The dental prosthesis according to claim 1, wherein said post and core has no margins.

11. The dental prosthesis according to claim 1, wherein said post and core is provided, on an external surface thereof protruding from the implant, with an ascending microscopic thread that starts in proximity to the implant.

12. The dental prosthesis according to claim 11, wherein a width of said microscopic thread is included between 4 μ

m and 100 μ

m.

13. The dental prosthesis according to claim 12, wherein the width of said microscopic thread is at least equal to 20 μ

m.

14. The dental prosthesis according to claim 11, wherein a depth of said microscopic thread is between 4 μ

m and 60 μ

m.

15. The dental prosthesis according to claim 14, wherein the depth of said microscopic thread is at least equal to 20 μ

m.

16. The dental prosthesis according to claim 4, wherein the diameter converges with an angle of convergence included between 1°

and 8°

.