The invention relates to a glazing composition for a porous dental zirconia article, the glazing composition comprising liquid, glass particles, fluorescing component(s) comprising europium, optionally hydrophilic silica nano-particles, and optionally hydrophobic silica nano-particles, wherein the fluorescing component(s) can be contained in the glass particles or as separate component. The invention also relates to a process for sintering a porous dental zirconia article with a glazing composition on its surface.

The amorphous, or at least partially crystalline, glass-based joining material is suitable for high-temperature applications, particularly in fuel cells and/or sensors. In addition to SiO.sub.2 and B.sub.2O.sub.3 as glass formers, the joining material similarly contains BaO and CaO, whereby the amount of Al.sub.2O.sub.3 is limited. The joining material has a coefficient of linear thermal expansion of at least 7.0.Math.10.sup.6 K.sup.1 in a range of 20 C. to 300 C. The joining material can be used for joining ferritic high-grade steels and/or chromium-containing alloys and/or ceramics, such as stabilized zirconium oxide and/or aluminium oxide.

A process for producing a sintered lithium disilicate glass ceramic dental restoration by way of sintering under reduced atmospheric pressure conditions at a temperature above 600 C. is described. Further described is a kit of parts for producing a sintered lithium disilicate glass ceramic dental restoration.

The present invention is directed to a process for producing a sintered lithium disilicate glass ceramic dental restoration out of a porous 3-dim article, the process comprising the step of sintering the porous 3-dim article having the shape of a dental restoration with an outer and inner surface to obtain a sintered lithium disilicate ceramic dental restoration, the sintered lithium disilicate glass ceramic dental restoration comprisingSi oxide calculated as SiO2 from 55 to 80 wt.-%, Li oxide calculated as Li2O from 7 to 16 wt.-%, Al oxide calculated as Al2O3 from 1 to 5 wt.-%, andP oxide calculated as P2O5 from 1 to 5 wt.-%, wt.-% with respect to the weight of the dental restoration, the sintering being done under reduced atmospheric pressure conditions, the reduced atmospheric pressure conditions being applied at a temperature above 600 C. The present invention is also directed to a kit of parts comprising a porous 3-dim article having the shape of a dental milling block and a respective instruction of use.

Glasses with high content of cerium and tin including the following components:

TABLE-US-00001 Component Wt. - % SiO.sub.2 38.0 to 68.0 Cerium, calculated as CeO.sub.2 4.0 to 23.0 Tin, calculated as SnO 3.0 to 18.0 Li.sub.2O 1.0 to 5.0 Alkali metal oxide Me.sup.I.sub.2O 5.8 to 15.9 Oxide of divalent elements Me.sup.IIO 3.2 to 10.5 Oxide of trivalent elements Me.sup.III.sub.2O.sub.3 3.5 to 11.8
and which are particularly suitable for the preparation of dental restorations whose fluorescence properties largely correspond to those of natural teeth.

The present invention is directed to a process for producing a sintered lithium disilicate glass ceramic dental restoration out of a porous 3-dim article, the process comprising the step of sintering the porous 3-dim article having the shape of a dental restoration with an outer and inner surface to obtain a sintered lithium disilicate ceramic dental restoration, the sintered lithium disilicate glass ceramic dental restoration comprising Si oxide calculated as SiO2 from 55 to 80 wt.-%, Li oxide calculated as Li2O from 7 to 16 wt.-%, Al oxide calculated as Al2O3 from 1 to 5 wt.-%, and P oxide calculated as P2O5 from 1 to 5 wt.-%, wt.-% with respect to the weight of the dental restoration, the sintering being done under reduced atmospheric pressure conditions, the reduced atmospheric pressure conditions being applied at a temperature above 600 C.

The present invention is also directed to a kit of parts comprising a porous 3-dim article having the shape of a dental milling block and a respective instruction of use.

A glass-ceramic composition includes a first crystalline phase including lithium disilicate; and a second crystalline phase comprising at least one of: zircon, zirconia, apatite, or a combination thereof.

The present invention relates to a composition for the remineralization of teeth and to the use thereof. The composition comprises calcium phosphate (CaP) glass, and aqueous silica sol.

A glazing material for producing a glazed ceramic body, in which at a first temperature T.sub.1, the glazing material has a viscosity of more than 10.sup.2.5 Pa.Math.s, in particular more than 10.sup.4.0 Pa.Math.s, preferably more than 10.sup.5.6 Pa.Math.s and particularly preferably more than 10.sup.7.0 Pa.Math.s, and, which at a second temperature T.sub.2, which is higher than the first temperature, a viscosity of less than 10.sup.9 Pa.Math.s, in particular less than 10.sup.7 Pa.Math.s and preferably less than 10.sup.5.6 Pa.Math.s. The glazing material can be used for glazing a non-densely sintered substrate material.