Method for producing dental prosthesis, method for producing lithium disilicate blank for dental prosthesis and lithium disilicate blank for dental prosthesis

Patent metadata

Field	Value
Publication number	US-9700392-B2
Application number	US-201514892078-A
Country	US
Kind code	B2
Filing date	Jul 8, 2015
Priority date	Aug 27, 2014
Publication date	Jul 11, 2017
Grant date	Jul 11, 2017

Abstract

Provided is a method for quickly producing a dental prosthesis with a good accuracy.
The method for producing a dental prosthesis including: a melting step of melting a material including no less than 60.0 mass % and no more than 80.0 mass % of SiO 2 , no less than 10.0 mass % and no more than 20.0 mass % of Li 2 O, and no less than 5.1 mass % and no more than 10.0 mass % of Al 2 O 3 ; a glass blank production step of cooling to solidify the molten material to obtain a glass blank; a lithium disilicate blank production step of heating the glass blank to obtain a lithium disilicate blank whose main crystalline phase is lithium disilicate; and a processing step of processing the lithium disilicate by machining.

First claim

The invention claimed is:

1. A method for producing a dental prosthesis comprising:
a melting step of melting a material comprising no less than 60.0 mass % and no more than 80.0 mass % of SiO 2 , no less than 10.0 mass % and no more than 20.0 mass % of Li 2 O, and no less than 5.1 mass % and no more than 10.0 mass % of Al 2 O 3 , and no less than 0.1 mass % and no more than 10.0 mass % of ZrO 2 ;
a glass blank production step of cooling to solidify the molten material to obtain a glass blank;
a lithium disilicate blank production step of heating the glass blank to obtain a lithium disilicate blank whose main crystalline phase is lithium disilicate; and
a processing step of processing the lithium disilicate blank by machining.

2. The method for producing a dental prosthesis according to claim 1 , wherein the machining is a cutting work.

3. A method for producing a lithium disilicate blank for a dental prosthesis, the blank to be machined into a shape of a dental prosthesis, the method comprising:
a melting step of melting a material comprising no less than 60.0 mass % and no more than 80.0 mass % of SiO 2 , no less than 10.0 mass % and no more than 20.0 mass % of Li 2 O, and no less than 5.1 mass % and no more than 10.0 mass % of Al 2 O 3 , and no less than 0.1 mass % and no more than 10.0 mass % of ZrO 2 ;
a glass blank production step of cooling to solidify the molten material to obtain a glass blank; and
a lithium disilicate blank production step of heating the glass blank to obtain a lithium disilicate blank whose main crystalline phase is lithium disilicate.

4. The method for producing a dental prosthesis according to claim 1 , wherein the material comprises no less than 3.1 mass %© and no more than 10.0 mass % of ZrO 2 .

5. The method for producing a lithium disilicate blank for a dental prosthesis according to claim 3 , wherein the material comprises no less than 3.1 mass % and no more than 10.0 mass % of ZrO 2 .

6. A lithium disilicate blank for a dental prosthesis, wherein the lithium disilicate blank comprises no less than 60.0 mass % and no more than 80.0 mass % of SiO 2 , no less than 10.0 mass % and no more than 20.0 mass % of Li 2 O, no less than 5.1 mass % and no more than 10.0 mass % of Al 2 O 3 , and no less than 3.1 mass % and no more than 10.0 mass % of ZrO 2 .

Assignees

• G C Dental Ind Corp

Inventors

• Hoshino Tomohiro
• Mashio Go
• Fujimoto Tatsuya
• Yoshinaga Masatoshi
• Yokohara Hayato
• Ohta Daisuke

Classifications

• A61K6/833

  Glass-ceramic composites · CPC title

• A61K6/831

  comprising non-metallic elements or compounds thereof, e.g. carbon · CPC title

• A61K6/853

  Silicates · CPC title

• A61C13/083 Primary

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

• A61C13/0022 Primary

  Blanks or green, unfinished dental restoration parts · CPC title