Shade-coordinated, veneering porcelain system for dental prostheses

Patent metadata

Field	Value
Publication number	US-11426332-B2
Application number	US-201715729208-A
Country	US
Kind code	B2
Filing date	Oct 10, 2017
Priority date	Oct 10, 2016
Publication date	Aug 30, 2022
Grant date	Aug 30, 2022

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

The invention claimed is:

1. A shade-coordinated porcelain system for a lithium disilicate-based glass-ceramic and/or YTZP zirconia-based ceramic substructure, comprising:
(i) a natural enamel/dentin body having a composition that includes:

Natural Enamel/

Oxide
Body White (wt %)

SiO 2
60-65

Al 2 O 3
10-13

Na 2 O
5-7

K 2 O
6-9

Li 2 O
1-3

CaO
0-2

BaO
2-4

MgO
0.5-1  

CeO 2
0.5-1  

Sb 2 O 3
0.5-1  

Tb 2 O 3
0.5-1  

TiO 2
0-1

SnO 2
0

B 2 O 3
3-5

ZrO 2
0.5-1  

P 2 O 5
0.5-1  

F
0.5-1  

Total
100

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

Oxide
Opal Enamel (wt %)

SiO 2
58-63

Al 2 O 3
10-13

Na 2 O
5-8

K 2 O
6-9

Li 2 O
1-3

CaO
1-3

BaO
1-3

MgO
0.05-1  

CeO 2
0.05-1  

Sb 2 O 3
0.05-1  

Tb 2 O 3
0.05-2  

TiO 2
0-1

SnO 2
0.05-1  

B 2 O 3
3-6

ZrO 2
0.05-1  

P 2 O 5
0.05-1  

F
0.05-1  

Total
100

and
(iii) a stain and/or glaze porcelain having a composition that includes:

Oxide
Stain and/or Glaze (wt %)

SiO 2
58-63

Al 2 O 3
10-13

Na 2 O
5-8

K 2 O
 4-10

Li 2 O
1-3

CaO
1-3

BaO
2-6

CeO 2
0.05-1  

Sb 2 O 3
0.005-1   

Tb 2 O 3
0-2

TiO 2
0-1

B 2 O 3
 5-12

Total
100

wherein the natural enamel/dentin body, the opal enamel, and the stain and/or glaze porcelain are thermally compatible to the substructure and have a CTE in the range between 8.8 ppm/° C. and 9.5 ppm/° C. @ 500° C. and
wherein the CTE of the natural enamel/dentin body and the opal enamel is achieved after firing the shade-coordinated porcelain system

Assignees

• Dentsply Sirona Inc

Inventors

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

Classifications

• A61K6/818

  comprising zirconium oxide · CPC title

• A61K6/20

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

• A61K6/802 Primary

  comprising ceramics · CPC title

• A61K6/833

  Glass-ceramic composites · CPC title

• A61C13/083

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