A dental formulation including: a bioactive glass composition as defined herein, in an effective amount; and a suitable carrier as defined herein, in an effective amount. Also disclosed is a method of making and using the dental formulation to treat, for example, dentin sensitivities.

The present disclosure provides a device and a method with which flat glasses with particularly uniform thickness can be obtained. The methods are drawing methods in which a glass ribbon is drawn. In the method an aperture is used which allows a defined very small slit between the glass ribbon and the aperture also in the case of a change of the position of the glass ribbon.

The present disclosure provides a device and a method with which flat glasses with particularly uniform thickness can be obtained. The methods are drawing methods in which a glass ribbon is drawn. In the method an aperture is used which allows a defined very small slit between the glass ribbon and the aperture also in the case of a change of the position of the glass ribbon.

Glasses containing silicon dioxide (SiO.sub.2) and/or boron oxide (B.sub.2O.sub.3) as glass formers and having a refractive index n.sub.d of greater than or equal to 1.80, as measured at 587.56 nm, a density of less than or equal to 5.5 g/cm.sup.3, as measured at 25° C., and a high transmittance to, particularly to blue light, are provided. Optionally, the glasses may be characterized by a high transmittance in the visible and near-ultraviolet (near-UV) range of the electromagnetic spectrum and/or good glass forming ability.

A glass composition includes: greater than or equal to 24 mol % and less than or equal to 60 mol % SiO.sub.2; greater than or equal to 23 mol % and less than or equal to 35 mol % Al.sub.2O.sub.3; greater than or equal to 3.5 mol % and less than or equal to 35 mol % B.sub.2O.sub.3; greater than 0 mol % and less than or equal to 20 mol % Li.sub.2O; greater than or equal to 0 mol % and less than or equal to 10 mol % Na.sub.2O; and greater than or equal to 0 mol % and less than or equal to 3 mol % K.sub.2O. The sum of Li.sub.2O, Na.sub.2O, and K.sub.2O (i.e., R.sub.2O) in the glass composition may be greater than or equal to 12 mol % and less than or equal to 20 mol %.

The invention relates to a radiopaque glass having a refractive index n.sub.d of 1.480 to 1.561, this glass, apart from impurities at most, being free from SrO and PbO. The glass is based on the SiO.sub.2, Al.sub.2O.sub.3 and B.sub.2O.sub.3 system. The radiopacity can be adjusted using Cs.sub.2O in particular in combination with BaO and/or SnO.sub.2 optionally in conjunction with fluorine. The glass may be used in particular as dental glass or as optical glass.

The invention relates to a radiopaque glass having a refractive index n.sub.d of 1.480 to 1.561, this glass, apart from impurities at most, being free from SrO and PbO. The glass is based on the SiO.sub.2, Al.sub.2O.sub.3 and B.sub.2O.sub.3 system. The radiopacity can be adjusted using Cs.sub.2O in particular in combination with BaO and/or SnO.sub.2 optionally in conjunction with fluorine. The glass may be used in particular as dental glass or as optical glass.

This thick-film resistive element paste is a resistive element paste containing: an electrically conductive metal powder including a copper powder and a manganese powder; a glass powder; and an organic vehicle, and is characterized in that the glass powder contains primarily an alkaline-earth metal.

Glasses comprising SiO.sub.2, Al.sub.2O.sub.3, and P.sub.2O.sub.5 that are capable of chemical strengthened by ion exchange and having high damage resistance. These phosphate-containing glasses have a structure in which silica (SiO.sub.2) is replaced by aluminum phosphate (AlPO.sub.4) and/or boron phosphate (BPO.sub.4).

Glasses comprising SiO.sub.2, Al.sub.2O.sub.3, and P.sub.2O.sub.5 that are capable of chemical strengthened by ion exchange and having high damage resistance. These phosphate-containing glasses have a structure in which silica (SiO.sub.2) is replaced by aluminum phosphate (AlPO.sub.4) and/or boron phosphate (BPO.sub.4).