Shade-coordinated, veneering porcelain system for dental prostheses

Patent metadata

Field	Value
Publication number	US-2018098918-A1
Application number	US-201715729208-A
Country	US
Kind code	A1
Filing date	Oct 10, 2017
Priority date	Oct 10, 2016
Publication date	Apr 12, 2018
Grant date	—

Abstract

The invention is related to a shaded porcelain system that contains two types of veneering porcelains: natural enamel/dentin body and opal enamel, as well as stain & glaze porcelain, with CTE that are compatible to and which can be used for veneering a dental prosthesis made of 1) lithium disilicate-based glass-ceramic substructure that is formed by hot pressing or CAD/CAM machined process or 2) YTZP zirconia-based ceramic substructure that is formed by CAD/CAM machined process in order to improve overall esthetics of final prosthesis.

First claim

1 . A shade-coordinated porcelain system, comprising:
a lithium disilicate-based glass-ceramic and/or YTZP zirconia-based ceramic substructure; at least one overlayer selected from the group consisting of: (i) a natural enamel/dentin body having a composition that includes

SiO 2
  55-70

Al 2 O 3
  5-18

Na 2 O
 0.5-13

K 2 O
  1-14

Li 2 O
0.05-8

(ii) an opal enamel having a composition that includes;

SiO 2
  53-68

Al 2 O 3
  5-18

Na 2 O
 0.5-13

K 2 O
  1-14

Li 2 O
0.05-8

CaO
0.05-8

BaO
0.05-8

(ii) a stain and/or glaze porcelain having a composition that includes;

SiO 2
  53-68

Al 2 O 3
  5-18

Na 2 O
 0.5-13

K 2 O
  1-14

Li 2 O
0.05-8

CaO
0.05-2

BaO
0.05-9

wherein the at least one overlayer is thermally compatible to the substructure.

2 . The shade-coordinated porcelain system of claim 1 , wherein the at least one overlayer has a CTE in the range between 8.8 ppm/° C. and 9.5 ppm/° C. @ 500° C.

3 . The shade-coordinated porcelain system of claim 1 , wherein the lithium disilicate-based glass-ceramic substructure has a CTE in the range of 9.5 ppm/° C. and 10.5 ppm/° C. @ 500° C.

4 . The shade-coordinated porcelain system of claim 3 , wherein the at least one overlayer has a CTE in the range between 8.8 ppm/° C. and 9.5 ppm/° C. @ 500° C.

5 . The shade-coordinated porcelain system of claim 1 , wherein the YTZP zirconia-based ceramic substructure has CTE in the range of 10.0-11.0 ppm/° C. @ 500° C.

6 . The shade-coordinated porcelain system of claim 5 , wherein the at least one overlayer has a CTE in the range between 8.8 ppm/° C. and 9.5 ppm/° C. @ 500° C.

7 . The shade-coordinated porcelain system of claim 2 , wherein the CTE of the at least one overlayer is achieved after firing the shade-coordinated porcelain system at a temperature in the range between 680° C. and 840° C.

8 . The shade-coordinated porcelain system of claim 2 , wherein the CTE of the at least one overlayer is achieved after firing the shade-coordinated porcelain system at a temperature in the range between 720° C. and 800° C.

9 . The shade-coordinated porcelain system of claim 2 , wherein the CTE of the at least one overlayer is achieved after firing the shade-coordinated porcelain system at a temperature in the range between 740° C. and 780° C.

10 . The shade-coordinated porcelain system of claim 7 , wherein the overlayer includes the natural enamel/dentin body and the stain and/or glaze porcelain; and wherein the CTE is achieved after firing the shade-coordinated porcelain system at a temperature 50° C., lower than the firing temperature of natural enamel/dentin body.

11 . The shade-coordinated porcelain system of claim 7 , wherein the overlayer includes the opal enamel layer and the stain and/or glaze porcelain; and wherein the CTE is achieved after firing the shade-coordinated porcelain system at a temperature 50° C., lower than the firing temperature of the opal enamel porcelain.

12 . The shade-coordinated porcelain system of claim 7 , wherein the CTEs of the natural enamel/dentin body or the opal enamel porcelain and stain & glaze porcelain are in the range between 9.0 ppm/° C. and 9.5 ppm/° C. @ 500° C. and the porcelain firing temperatures are in the range between 750° C. and 770° C.

Assignees

• Dentsply Sirona Inc

Inventors

• Banasiak Slawomir
• Nemzer Vicky
• Chu Christopher
• Ammon Dan

Classifications

• A61K6/802 Primary

  comprising ceramics · CPC title

• A61K6/833

  Glass-ceramic composites · CPC title

• A61K6/20

  Protective coatings for natural or artificial teeth, e.g. sealings, dye coatings or varnish · CPC title

• A61K6/818

  comprising zirconium oxide · CPC title

• A61C13/083

  Porcelain or ceramic teeth {(A61C13/081 takes precedence; preparations A61K6/80)} · CPC title