US 8,697,176 B2 · Method of changing translucent properties of zirconia dental materials

Abstract

The present invention relates to a method for changing translucency of zirconia dental materials through applying an yttrium or ytterbium salt solution onto a pre-sintered zirconia material by dipping or brush-coating. Accordingly, the need of young patient in relation to the translucent requirement for incisal portion of anterior teeth is met in which the translucent level from the crown neck to the incisal portion is gradually changed in a natural manner, similar to natural teeth. A color gradient effect of the crown is produced through dipping in or brush-coating with yttrium or ytterbium salt solution. Moreover, the present invention involves simple operating steps and low cost while providing high consistency in quality.

Claims14

Dependent claims

A method for changing a translucent property of zirconia dental materials, comprising:

preparing an aqueous or an alcohol-water solution of a soluble yttrium salt or a soluble ytterbium salt at a concentration of 10 wt % to 73 wt %, based on the total weight of the solution;
treating a pre-sintered zirconia material with the salt solution to provide a treated zirconia material;
drying the treated zirconia material;
sintering the dried and treated zirconia material at 1400° C. to 1600° C. to obtain a final product of zirconia material with gradient translucency or high translucency.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

13/703,610Filed 21 Nov 2011

Priority

CN 2011 1 01839914 Jul 2011

Published

US 2013/0115365 A19 May 2013

Granted

15 Apr 2014

Term ends

Not estimatedThe source records don’t support an estimate.

Classification17 codes

A61K 6/818
Comprising ceramics: comprising zirconium oxide
C04B 35/486
Based on zirconium or hafnium oxides, zirconates, zircon or hafnates: fine ceramics
C04B 41/009
After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone: characterised by the material treated
C04B 41/5009
With salts or salty compositions, e.g. for salt glazing: containing nitrogen in the anion, e.g. nitrites

Method of changing translucent properties of zirconia dental materials

Life of this patent

Method of changing translucent properties of zirconia dental materials

Life of this patent

Abstract

Claims14