Process for selectively treating the surface of dental ceramic

Abstract

The invention also relates to a dental zirconia article obtainable or obtained by such a process and a kit of parts comprising a container containing a certain liquid composition and a dental zirconia mill blank useful for producing a porous dental zirconia article.

1 . A kit of parts comprising:
 a container containing a liquid composition, wherein the liquid composition comprises a whitening agent comprising a phosphorous containing component, the phosphorous containing component comprising a phosphate, phosphone or phosphine moiety, wherein at least one P-O unit of the phosphate, phosphone or phosphine moiety is dissociable or able to interact with zirconia;   a dental zirconia mill blank useful for producing a porous dental zirconia article.   
     
     
         2 . A kit of parts of  claim 1  further comprising an instruction of use. 
     
     
         3 . A kit of parts of  claim 1  further comprising a receptacle containing a colouring liquid; 
     
     
         4 . A kit of parts of  claim 1  further comprising an application device. 
     
     
         5 . A device comprising:
 at least one compartment (A) containing the liquid composition, wherein the liquid composition comprises a whitening agent comprising a phosphorous containing component, the phosphorous containing component comprising a phosphate, phosphone or phosphine moiety, wherein at least one P-O unit of the phosphate, phosphone or phosphine moiety is dissociable or able to interact with zirconia; and   at least one compartment (B) containing a colouring liquid comprising a solvent and colouring ions; and   an instruction of use for selectively treating parts of a porous dental zirconia article;   wherein compartment (A) and compartment (B) are separated from each other by a pre-defined break zone.