Dental prosthesis system, for the use with at least two dental implants

Patent metadata

Field	Value
Publication number	US-11957539-B2
Application number	US-201917272140-A
Country	US
Kind code	B2
Filing date	Aug 27, 2019
Priority date	Aug 29, 2018
Publication date	Apr 16, 2024
Grant date	Apr 16, 2024

Abstract

A dental prosthesis system, for the use with at least two dental implants, wherein the dental prosthesis is divided in a first prosthetic part and a second prosthetic part, jointed by a prosthetic screw, and wherein the first prosthetic part is connected to the dental implants through at least two connectors, and such dental prosthesis has an engaging and guidance system, including two female elements, disposed on the top of the first prosthetic part, and two corresponding male elements, disposed on the bottom of the second prosthetic part, whereby the connection between the two female elements and the two male elements is releasable.

First claim

The invention claimed is:

1. A dental prosthesis system with a mechanical weakness, for the use with at least two dental implants, comprising:
a first prosthetic part, with a mesial, distal, lingual and buccal faces, a top section and a bottom section;
a second prosthetic part, with a mesial, distal, lingual and buccal faces, a top section and a bottom section;
a sacrificial prosthetic screw, joining the first prosthetic part and the second prosthetic part, and configured to deform or fracture in the event of excess load due to mastication force or fatigue use;
at least two screw channels leading to at least two connectors arranged in the bottom section of the first prosthetic part, wherein the at least two screw channels are configured to introduce implant screws; and
an engaging and guiding system comprising two female elements disposed on the top section of the first prosthetic part, and two corresponding male elements disposed on the bottom section of the second prosthetic part, wherein the two female elements and the two corresponding male elements are releasably connected, wherein the first prosthetic part is connected to at least two dental implants through the at least two connectors,
wherein the mechanical weakness is provided by the sacrificial prosthetic screw.

2. The dental prosthesis system, for the use with at least two dental implants, according to claim 1 , wherein the first prosthetic part and the second prosthetic part are divided horizontally, and wherein a height of the second prosthetic part corresponds to the vertical dimension of the dental crown of a patient, having a value of between 6 and 10 mm, which corresponds to a range from 20% to 80% of an existing crown height space.

3. The dental prosthesis system, for the use with at least two dental implants, according to claim 1 , wherein the first prosthetic part and the second prosthetic part has a slope in a range from 5 degrees to 25 degrees, wherein the slope is related to an horizontal plane formed by the bottom section of the first prosthetic part or the top section of the second prosthetic part.

4. The dental prosthesis system, for the use with at least two dental implants, according to claim 3 , wherein a height of the second prosthetic part is equal or superior to 5 mm on a side wherein the second prosthetic part is highest along a longitudinal plane of an existing crown height space.

5. The dental prosthesis system, for the use with at least two dental implants, according to claim 2 , wherein the crown height space is equal or superior to 15 mm.

6. The dental prosthesis system, for the use with at least two dental implants, according to claim 1 , wherein the second prosthetic part has a vertical dimension of a lost tooth and the first prosthetic part occupies a remaining space between the implant platform and a bottom of the second prosthetic part, and wherein the first prosthetic part has a dimension of a bone and gingiva, that the first prosthetic part intends to replace, and the second prosthetic part has a dimension of lost teeth, that the second prosthetic part intends to replace.

7. The dental prosthesis system, for the use with at least two dental implants, according to claim 1 , wherein the two corresponding male elements comprise two projections and the two female elements comprise two grooves, wherein the two corresponding male elements comprising two projections and the two corresponding female elements comprising two grooves are disposed transversely, from palatal/lingual to buccal, respectively along the second prosthetic part bottom section and the first prosthetic part top section.

8. The dental prosthesis system, for the use with at least two dental implants, according to claim 7 , wherein the two female elements comprising two grooves are deeper and longer than the two corresponding male elements comprising two projections.

9. The dental prosthesis system, for the use with at least two dental implants, according to claim 1 , wherein the corresponding male elements comprises two conical or cylindrical extensions and the two female elements comprises two conical or cylindrical cavities.

10. The dental prosthesis system, for the use with at least two dental implants, according to claim 9 , wherein the two female elements comprising two conical or cylindrical cavities correspond to the at least two screw channels leading to the at least two connectors.

11. The dental prosthesis system, for the use with at least two dental implants, according to claim 1 , wherein the prosthetic screw is made from a material selected from the group consisting of a metal, an alloy, a ceramic, a polymer and a reinforced polymer.

12. The dental prosthesis system, for the use with at least two dental implants, according to claim 11 , wherein the material of the prosthetic screw is selected from a titanium alloy, a cobalt-chrome alloy, zirconia and polyether ether ketone, wherein the polyether ether ketone is optionally reinforced.

13. The dental prosthesis system, for the use with at least two dental implants, according to claim 1 , wherein the first prosthetic part and the second prosthetic part are made from a material selected from the group consisting of a metal, an alloy, a polymer, a reinforced polymer and a ceramic.

14. The dental prosthesis system, for the use with at least two dental implants, according to claim 13 , wherein the materials of the first prosthetic part and the second prosthetic part are selected from the group consisting of titanium alloys, cobalt-chrome alloys, titanium, zirconia, ceramics materials, and polyether ether ketone (PEEK), wherein the polyether ether ketone is optionally reinforced with carbon fibre or glass fibre.

15. The dental prosthesis system, for the use with at least two dental implants, according to claim 12 , wherein the titanium alloy is titanium grade V alloy (Ti6Al4V).

16. The dental prosthesis system, for the use with at least two dental implants, according to claim 14 , wherein the titanium alloy is titanium grade V alloy (Ti6Al4V).

Assignees

• Univ Do Porto

Inventors

• Rocha Ferreira Jose Joaquim

Classifications

• A61C8/0068 Primary

  with an additional screw · CPC title

• A61C8/0016

  polymeric material · CPC title

• A61C8/0027 Primary

  Frames · CPC title

• A61C8/0078

  with platform switching, i.e. platform between implant and abutment · CPC title

• A61K6/836

  Glass · CPC title