Abstract: A material composition for use in forming a porous metal structure and dental coping in the preparation of a dental restoration comprising a composite of metal particles in a matrix including low fusing temperature metal particles and at least between 35 to 85% medium fusing temperature metal particles by volume with the medium fusing temperature metal particles possessing a melting characteristic which during heat treatment of the material composition to form the porous metal structure results in partial melting of the medium fusing temperature metal particles to the extent of between about 4% to 50% by volume of the particle mass of each medium fusing temperature metal particle.

Abstract: A method for attaching a metal structure to a dental coping having opposite sides in the preparation or repair of a dental restoration comprising the steps of: (1) forming a dental material composition comprising high-fusing temperature metal particles in a range of between 1-10 weight percent with the high-fusing temperature metal particles having at least 30% thereof selected from the platinum group of metals, low fusing temperature metal particles having a melting temperature below the melting temperature of the high-fusing particles with the low fusing temperature metal particles being present above at least about 90 weight percent of the total composition and being composed primarily of gold, and a small measure of borate fluxes in a range of between 0.1 to 2.

Abstract: A dental material composition for attaching a metal structure to a dental coping in the preparation or repair of a dental restoration which includes a component of high-fusing temperature metal particles in a range of between 1-10 weight percent, a component of low fusing temperature metal particles having a melting temperature below the melting temperature of the high-fusing particles in excess of at least 90 weight percent and preferably above about 95 weight percent of the total composition with the low fusing temperature metal particles composed primarily of gold, a small measure of borate fluxes in a range of between 0.1 to 2.0% by weight of the total composition and a volatile binder.

Abstract: A material composition for use in forming a porous metal structure and dental coping in the preparation of a dental restoration comprising a composite of metal particles in a matrix including low fusing temperature metal particles and at least between 35 to 85% medium fusing temperature metal particles by volume with the medium fusing temperature metal particles possessing a melting characteristic which during heat treatment of the material composition to form the porous metal structure results in partial melting of the medium fusing temperature metal particles to the extent of between about 4% to 50% by volume of the particle mass of each medium fusing temperature metal particle.

Abstract: A method to increase the cement retention of a metal dental coping to the structure of a tooth in the preparation of a crown or bridge. The method includes forming a liquid composition of high and low fusing temperature metal particles with at least 50% of the high fusing metal particles having a thin cross-sectional average thickness of less than 5 microns and coating the interior surfaces of the metal coping with the liquid composition to form a thin coating of no greater than 20 microns before the coping is mounted on the tooth structure. The thin coating of liquid composition should then be heat treated at a temperature of between 750° C. and 1050° C. to permit the low-fusing temperature metal particles to fuse but not entirely melt. Following heat treatment a dental cement should be applied to the tooth structure or coping in a conventional manner. Thereafter, the coping is mounted on the tooth structure with the heat treated coating in contact with the dental cement to improve retention.

Abstract: A dental material composition for attaching a metal structure to a dental coping in the preparation or repair of a dental restoration which includes a component of high-fusing temperature metal particles in a range of between 1-10 weight percent, a component of low fusing temperature metal particles having a melting temperature below the melting temperature of the high-fusing particles in excess of at least 90 weight percent and preferably above about 95 weight percent of the total composition with the low fusing temperature metal particles composed primarily of gold, a small measure of borate fluxes in a range of between 0.1 to 2.0% by weight of the total composition and a volatile binder.

Abstract: A method and dental composition for improving the retention of a metal coping to a tooth structure comprising the steps of: coating the interior surfaces of said metal dental coping with a thin coating of no greater than 20 microns of a dental material formed of a wet composition comprising high and low temperature metal particles having less than 40% by volume high-fusing temperature metal particles and a non-viscous volatile binder; and firing the coated metal dental coping at a temperature between 750° C. and 1050° C. to permit the low-fusing temperature metal particles to fuse but not to entirely melt.

Abstract: A method for forming a dental coping from a base material composition containing high fusing temperature metal particles and a wax binder and a filler material composition containing low fusing temperature metal particles and a wax binder wherein the two materials are molded over the surface of a die either separately or as a laminate into a shape conforming to the shape of a tooth to be restored and heat treated in a a furnace in a single heat treatment operation from a temperature to cause the high fusing temperature metal particles to form a stable porous structure of high fusing temperature metal to an elevated temperature not to exceed about 1130° C. but preferably between about 1075° C. and 1100° C. so as to melt and densify the low fusing particles into the porous structure.

Abstract: A bonding material for joining a polymeric veneering material or porcelain ceramic to a metal framework of a dental restoration or dental prosthesis before sintering the porcelain at a suitable temperature to form a clinically unbreakable structure. The bonding material is composed of finely divided metal particles including at least 50% gold or a gold alloy as its major constituent and finely divided particles of a carbonaceous material preferably of activated carbon.

Abstract: The implant of the present invention is composed of a core body having an outer surface of a composition of at least two dissimilar biocompatible metal components or metal alloy components in intimate contact with one another with said dissimilar metals or metal alloy components each having an EMF sufficient to form a potential difference of at least 25 mV and preferably over 100 mV.

Abstract: A dental crown restoration which comprises a metal coping and a relatively thick outer coating of a ceramic dental veneer. The metal coping is composed of a lamination of a low fusing temperature precious metal component substantially or entirely of gold and a high-fusing temperature precious metal component. The high fusing component is formed from three layers with one layer composed of from 90 to 100% palladium bounded on both sides by a gold based layer.

Abstract: The dental jacket crown of the present invention is prepared from a thin metal foil substrate which is coated with a noble based metal composition having a low fusing temperature and folded in a predetermined manner to form multiple folds in the form of triangular like flaps or pleats. The folded foil represents the coping of the present invention. The coping is mounted over a die of the prepared tooth and the flaps wrapped in overlapping formation and then adapted to the die. The die is removed and the structure heated preferably under a bunsen burner. A bonding material may be coated over the free standing structure if desired. A veneering material such as porcelain is then coated over the structure to form the crown.

Abstract: The dental jacket crown of the present invention is prepared from a thin metal foil substrate which is coated with a noble based metal composition having a low fusing temperature and folded in a predetermined manner to form a multiple number of triangular like flaps or pleats. The folded foil represents the coping of the present invention. The coping is mounted over a die of the prepared tooth and the flaps wrapped in overlapping formation and then adapted to the die. The die is removed and the structure heated preferably under a bunsen burner. A veneering material such as porcelain is then coated over the structure to form the crown.

Abstract: A method of forming a clinically unbreakable composite structure between a noble based metal and a ceramic comprising depositing a thin layer of a bonding material including finely divided particles of a noble metal halide alone or in combination with particles of a noble metal; sintering the layer at a predetermined temperature between 1775.degree. F. and 1975.degree. F. and firing a ceramic over the sintered coating.

Abstract: The dental jacket crown of the present invention is prepared from a thin metal foil substrate which is coated with a noble based metal composition having a low fusing temperature and folded in a predetermined manner to form a multiple number of triangular like flaps or pleats. The folded foil represents the coping of the present invention. The coping is mounted over a die of the prepared tooth and the flaps wrapped in overlapping formation and then adapted to the die. The die is removed and the structure heated preferably under a bunsen burner. A veneering material such as porcelain is then coated over the structure to form the crown.

Abstract: The dental jacket crown of the present invention is prepared from a thin metal foil substrate which is coated with a noble based metal composition having a low fusing temperature and folded in a predetermined manner to form multiple folds in the form of triangular like flaps or pleats. The folded foil represents the coping of the present invention. The coping is mounted over a die of the prepared tooth and the flaps wrapped in overlapping formation and then adapted to the die. The die is removed and the structure heated preferably under a bunsen burner. A bonding material may be coated over the free standing structure if desired. A veneering material such as porcelain is then coated over the structure to form the crown.

Abstract: A dental material and method for forming, reinforcing or repairing a dental restoration comprising a combination of a high fusing temperature metal component in a major proportion and a low fusing temperature component in a minor proportion. A binder may be added to form a putty-like consistency. The dental material is molded into a predetermined shape and heat treated at a temperature which will substantially melt the low fusing metal components but below the melting temperature of the high fusing metal component for forming a porous, sponge-like mass of interconnected particles of the high fusing temperature metal component. A filler material having a low melting temperature is then added to the porous mass and the mass is again treated to form a solid mass.

Abstract: A dental material of a metal composition for reinforcing the metal framework of a dental restoration comprising an aggregate combination of metal particles including a first high fusing temperature precious metal component and a second low fusing temperature component which form a porous sponge-like structure upon heat treatment.