The invention relates to a process of producing a dental zirconia article, the process comprising the step of sintering a porous dental zirconia article, the sintering comprising a heat-treatment segment A characterized by a heating rate of at least 3 K/sec up to a temperature of at least 1,200° C., the porous dental zirconia article being composed of a zirconia material containing 6.0 to 8.0 wt. % yttria, 0.05 to 0.12 wt. % alumina and comprising a coloring component containing Tb, the porous dental zirconia article being essentially free of Fe components. The invention also relates to a process comprising the additional step of applying a glazing composition to the outer surface of the porous zirconia article before the heat-treatment or sintering is conducted.

An antibacterial composition, includes: a borate-based glass material having a composition of: 0-25 wt. % SiO.sub.2, 30-75 wt. % B.sub.2O.sub.3, 0-10 wt. % P.sub.2O.sub.5, 0-30 wt. % Al.sub.2O.sub.3, 0-5 wt. % Li.sub.2O, 1-25 wt. % Na.sub.2O, 0-15 wt. % K.sub.2O, 0-10 wt. % MgO, 10-25 wt. % CaO, 12-30 wt. % MO, 8-25 wt. % R.sub.2O, and 30-75 (B.sub.2O.sub.3+Al.sub.2O.sub.3), such that at least one of P.sub.2O.sub.5 or Al.sub.2O.sub.3 is present, MO is the sum of MgO, CaO, SrO, and BaO, R.sub.2O is the sum of Na.sub.2O, K.sub.2O, Li.sub.2O, and Rb.sub.2O, and the borate-based glass material is configured to achieve at least a 3.5-log kill rate of at least one of E. coli, P. gingivalis, or S. mutans bacteria.

The present disclosure relates to a glass composition as well as a glass powder. The disclosure also relates to the use in the dental field, e.g. as dental material such as dental filling or dental restauration material, in particular as or for the production of a glass ionomer cement, for example for the treatment and/or for the filling of cavities in human and/or animal teeth and/or for tooth 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 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.

Provided is a silicate glass, a method for preparing a silicate glass-ceramics by using the silicate glass, and a method for preparing a lithium disilicate glass-ceramics by using the silicate glass, and more particularly, to a method for preparing a glass-ceramics that has a nanosize of 0.2 to 0.5 μm and contains lithium disilicate and silicate crystalline phases. A nano lithium disilicate glass-ceramics containing a SiO.sub.2 crystalline phase includes: a glass composition including 70 to 85 wt % SiO.sub.2, 10 to 13 wt % Li.sub.2O, 3 to 7 wt % P.sub.2O.sub.5 working as a nuclei formation agent, 0 to 5 wt % Al.sub.2O.sub.3 for increasing a glass transition temperature and a softening point and enhancing chemical durability of glass, 0 to 2 wt % ZrO.sub.2, 0.5 to 3 wt % CaO for increasing a thermal expansion coefficient of the glass, 0.5 to 3 wt % Na.sub.2O, 0.5 to 3 wt % K.sub.2O, and 1 to 2 wt % colorants, and 0 to 2.0 wt % mixture of MgO, ZnO, F, and La.sub.2O.sub.3.

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.

A bioactive glass composition comprising titanium homogenously incorporated and distributed throughout the glass and method of making a sol-gel or melt-derived bioactive glass, the bioactive glass increasing osteogenic differentiation and can be used for enamel remineralization in dentistry or bone tissue engineering.

Disclosed herein are curable glass ionomer compositions that include a first paste and a second paste, and methods for using the disclosed compositions. The first paste includes water, a polyacid, and a non acid-reactive filler. The second paste includes water, an acid-reactive filler; and non-aggregated, water-miscible, nano-sized silica particles having at least 25% surface coverage of the particles with a silane. The composition is essentially free of a resin. In some embodiments, the water content of the first paste and the second paste of the paste/paste GI composition disclosed herein is less than 20% by weight, based on the total weight of the composition.

Provided is a silicate glass, a method for preparing a silicate glass-ceramics by using the silicate glass, and a method for preparing a lithium disilicate glass-ceramics by using the silicate glass, and more particularly, to a method for preparing a glass-ceramics that has a nanosize of 0.2 to 0.5 μm and contains lithium disilicate and silicate crystalline phases. A nano lithium disilicate glass-ceramics containing a SiO.sub.2 crystalline phase includes: a glass composition including 70 to 85 wt % SiO.sub.2, 10 to 13 wt % Li.sub.2O, 3 to 7 wt % P.sub.2O.sub.5 working as a nuclei formation agent, 0 to 5 wt % Al.sub.2O.sub.3 for increasing a glass transition temperature and a softening point and enhancing chemical durability of glass, 0 to 2 wt % ZrO.sub.2, 0.5 to 3 wt % CaO for increasing a thermal expansion coefficient of the glass, 0.5 to 3 wt % Na.sub.2O, 0.5 to 3 wt % K.sub.2O, and 1 to 2 wt % colorants, and 0 to 2.0 wt % mixture of MgO, ZnO, F, and La.sub.2O.sub.3.

The disclosure relates to bioactive glasses for use in biomedical applications. In particular, the glasses described herein are phosphate glasses that show fast filling rates of dentin tubules and have advantageous release rates of metal ions, which provide advantages in antibacterial applications and wound healing.