METHOD TO MANUFACTURE A COLORED BLANK, AND BLANK
First Claim
1. A method for manufacturing a colored blank comprising zirconium dioxide that is intended for the production of a dental restoration, whereby raw materials in powder from, at least several of which contain one coloring element each, are mixed with zirconium dioxide as the main constituent, the resulting mixture is pressed, and subsequently subjected to at least one thermal treatment, wherein as the coloring elements in the raw materials in powder form one uses at least terbium, erbium, cobalt, as well as one element that generates a fluorescent effect in the dental restoration, while iron, apart from natural impurities, is not present.
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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.
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Citations
49 Claims
- 1. A method for manufacturing a colored blank comprising zirconium dioxide that is intended for the production of a dental restoration, whereby raw materials in powder from, at least several of which contain one coloring element each, are mixed with zirconium dioxide as the main constituent, the resulting mixture is pressed, and subsequently subjected to at least one thermal treatment, wherein as the coloring elements in the raw materials in powder form one uses at least terbium, erbium, cobalt, as well as one element that generates a fluorescent effect in the dental restoration, while iron, apart from natural impurities, is not present.
Specification