Abstract: A biocompatible, strong, radio-opaque high melting glass is obtained by reacting at the melt mono-basic calcium phosphate with phosphoric acid and a radio-opaque-imparting component such as bismuth oxide (Bi.sub.2 O.sub.3) or barium oxide (BaO). After soaking, cooling and drying, the glass may be ground to desired particle size, and is admirably suited for use as a filler, binder, or structural mass in the dental and medical fields.

Abstract: An artificial porcelain tooth product containing a combination of terbium and cerium salts to produce a desired fluorescence.

Abstract: The instant invention relates to a novel dental glaze which matures at a temperature of from 1400.degree. to 1600.degree. F, that is, at least 200.degree. lower than the vitrifying temperature of dental porcelain. The chemical composition of this novel glaze may be thusly represented, on a weight basis:______________________________________ SiO.sub.2 45-52% B.sub.2 O.sub.3 15-20% Al.sub.2 O.sub.3 10-15% K.sub.2 O 3.5-7.5% Na.sub.2 O 12-17% CaO 0-1% ZnO 0-1% F 1-3% ______________________________________Preferably the instant novel glaze is further characterized as having an average particle size of 10 .+-. 4 microns and not more than 1% of the particles having a diameter greater than 30 microns.