The invention relates to glass ceramics and glasses with cerium and tin content, which comprise the following components: TABLE-US-00001 Component wt.-% SiO.sub.2 42.0 to 80.0 Al.sub.2O.sub.3 0.1 to 42.0 Cerium, calculated as CeO.sub.2 0.5 to 10.0 Tin, calculated as SnO 0.1 to 4.0
and which are suitable in particular for the preparation of dental restorations, the fluorescence properties of which largely correspond to those of natural teeth.

The invention relates to glass ceramics and glasses with a europium content, containing the following components: TABLE-US-00001 Component wt.-% SiO.sub.2 30.0 to 75.0 Al.sub.2O.sub.3 10.0 to 45.0 Europium, calculated as Eu.sub.2O.sub.3 0.05 to 5.0 
and which are suitable in particular for the production of restorations, the fluorescence properties of which largely correspond to those of natural teeth.

A silicate-based glass composition includes: 40-60 wt. % SiO.sub.2, 0-10 wt. % B.sub.2O.sub.3, 0.01-10 wt. % P.sub.2O.sub.5, 0-10 wt. % Al.sub.2O.sub.3, 0-5 wt. % Li.sub.2O, 10-30 wt. % Na.sub.2O, 0.01-15 wt. % K.sub.2O, 0.01-5 wt. % MgO, 15-30 wt. % CaO, 15-35 wt. % MO, and 15-30 wt. % R.sub.2O, such that MO is the sum of MgO, CaO, SrO, BeO, and BaO, and R.sub.2O is the sum of Na.sub.2O, K.sub.2O, Li.sub.2O, Rb.sub.2O, and Cs.sub.2O.

To provide a dental porcelain paste which can maintain maintaining the paste state and have excellent application property for a long period of time and hardly causes carbonization or bubbles due to the influence of an organic component or a polymer component during firing. The present invention provides a dental porcelain paste for preparing a dental prosthesis device, comprising: 50.0 to 80.0 wt. % of a glass powder (a) having a maximum particle diameter of 100 μm or less and an average particle diameter of 1 to 20 μm, 0.5 to 10.0 wt. % of a hydrophobized fine particle silica (b) having an average primary particle diameter of 1 to 50 nm, and 10.0 to 49.5 wt. % of an organic solvent (c) having a boiling point it is within (bp) of 100 to 300° C.

Provided are methods and compositions relating to a dental composition more specifically to prepare the damaged dentin of the tooth for animals and pets such as canine, feline and members of the taxonomic family Equidae prior to repair. The dental compositions include a bioactive glass and a non-aqueous solvent comprising an alcohol, anti-inflammatory and anti-pain reliever.

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.

Disclosed is a machinable dental bulk block that is a glass ceramic block including an amorphous glass matrix and crystalline phases introduced into the matrix. A major crystalline phase is lithium disilicate and minor crystalline phases are lithium phosphate and at least one of spodumene and virgilite. The dental block is made of a functionally gradient material in which the major crystalline phase exhibits a gradient of particle sizes in a depth direction of the dental block and which has no interface at a point where the gradient of particle sizes of the major crystalline phase changes. The dental bulk block is useful for production of a dental prosthesis (artificial tooth) similar to a natural tooth. The dental bulk block can reduce time and the number of processing steps to manufacture a dental prosthesis and provides improved structural stability through good force distribution obtained by functionally graded mechanical properties.

Disclosed is a machinable dental bulk block that is a glass ceramic block including an amorphous glass matrix and crystalline phases introduced into the matrix. A major crystalline phase is lithium disilicate and a minor crystalline phase is lithium phosphate. The dental block is made of a functionally gradient material in which the major crystalline phase exhibits a gradient of particle sizes in a depth direction of the dental block and which has no interface at a point where the gradient of particle sizes of the major crystalline phase changes. The dental bulk block is useful for production of a dental prosthesis (artificial tooth) similar to a natural tooth. The dental bulk block can reduce time and the number of processing steps to manufacture a dental prosthesis and provides improved structural stability through good force distribution obtained by functionally graded mechanical properties.

Provided are methods and compositions relating to a dental composition more specifically to prepare the damaged dentin of the tooth for animals and pets such as canine, feline and members of the taxonomic family Equidae prior to repair. The dental compositions include a bioactive glass and a non-aqueous solvent comprising an alcohol, anti-inflammatory and anti-pain reliever.

A dental glass powder includes 15 to 40% by mass of zinc oxide (ZnO), 20 to 55% by mass of silicon oxide (SiO.sub.2), 6 to 20% by mass of aluminum oxide (Al.sub.2O.sub.3), 1 to 13% by mass of calcium oxide (CaO), and 1 to 19% by mass of fluorine (F).