Abstract: The metal cores of the dental construction are alloys composed primarily of nickel, chromium and silicon and containing on a weight percent basis, about 65 to 75% nickel, about 15 to 23.5% chromium and about 3.5 to 6% silicon, to which a small amount of molybdenum and boron are added. The molybdenum is present within the range of 3 to 5% and boron within the range of 0.2 to 2% by weight of the total alloy composition. The alloys have excellent physical properties for dental applications having a fusion temperature with the range of about 2050.degree. to 2350.degree. F., a coefficient of expansion of from about 13.6.times.10.sup.-6 in/in/.degree.C. to about 13.8.times.10.sup.-6 in/in/.degree.C., good corrosion resistance when compared with similarly cast gold or other commercial nonprecious metal dental alloys and good oxidation resistance. They also have as casted, a tensile strength of at least 90,000 p.s.i., an elongation of about 0.5 to 5.

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

Abstract: The invention relates to dental constructions such as bridges, crowns and the like comprising a metal core and porcelain or other tooth simulating material bonded thereto, and to dental alloys having good physical strength, corrosion resistance, workability and ability to bond to porcelain. The dental alloys have a base cost of substantially less than gold but are equal to or better than gold for many dental applications. The alloys are also useful in dental applications not requiring bonding to porcelain or plastic as in the preparation of metal inlays or onlays.The metal cores of the dental construction are alloys composed primarily of nickel, chromium and silicon and containing on a weight percent basis, about 65 to 75 percent nickel, about 15 to 23.5 percent chromium and about 3.5 to 6 percent silicon, to which a small amount of molybdenum and boron are added. The molybdenum is present within the range of 3 to 5 percent and boron within the range of 0.

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.

Abstract: The invention relates to dental solder particularly suitable for joining parts of structural frameworks made of non-precious metal alloys, the framework being used in the preparation of bridges, crowns and the like. The solder compositions consist essentially of about 69 to 75% nickel, about 14 to 19.9% chromium, about 4 to 5.5% silicon and about 2.5 to 6% boron. The compositions may be modified to include up to about 6% molybdenum to increase corrosion resistance. The solder has a fusion temperature in the range of from about 1800.degree. to about 1950.degree. F and a diametrial tensile strength of at least 35,000 p.s.i. and a solder joint tensile strength of at least 70,000 p.s.i.