Patent · US Active

Method to manufacture a colored blank, and blank

US10441391B2 · kind B2 · utility

6Cited by

6References

48Claims

0Family size

Assignee

Dentsply Sirona Inc. · US

Inventors

Lothar Volkl · Goldbach, DE
Stefan Fecher · Goldbach, DE
Martin Kutzner · Neuberg, DE
Tanja Oefner · Gelnhausen, DE

Key dates

Filing date	Mar 20, 2017
Grant date	Oct 15, 2019
Priority date	—
Expiry date	May 1, 2037

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC04B2237/348
WIPO fieldPharmaceuticals
WIPO sectorChemistry

Abstract

The invention relates to a method for manufacturing a colored blank, which contains zirconium dioxide and is intended for the manufacture of a dental restoration, whereby raw materials in powder form, at least some of which contain one coloring substance each, are mixed with, zirconium dioxide as the main ingredient, the resulting mixture is pressed and subsequently subjected to at least one thermal treatment. To generate the desired fluorescence, it is intended that in the raw materials in powder form one uses as coloring substances at least terbium, erbium, cobalt, as well as one substance that generates a fluorescence effect in the dental restoration, however not iron, aside from naturally occurring impurities.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.