Reinforced jacket crown and method of construction
OwnerItzhak Shoher, Aharon E. Whitemaninventors
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Abstract
The reinforced jacket crown of the present invention comprises an inner structure including a thin metal foil of platinum conforming in shape to the tooth preparation to be restored, at least one fired on coating of a composition of finely divided particles of from about 1 to 100% by weight of a noble metal halide in combination with from zero to 99% by weight of a noble based metal and a relatively thick fired on outer coating of dental porcelain.
Claims10
A reinforced porcelain jacket crown restoration comprising a composite body including a thin metal foil of platinum conforming in shape to the tooth preparation to be restored, at least one thin intermediate coating of a predetermined composition of finely divided particles bonded to said thin metal foil at an elevated sintering temperature above at least 1600.degree. F.;
- said composition comprising, from about 1 to 100% by weight of a noble metal chloride with said noble metal being selected from the group consisting of gold, silver, palladium and platinum in combination with from zero to 99% by weight of a gold based noble metal;
- and a relatively thick fired on outer coating of dental porcelain.
A method of constructing a reinforced porcelain jacket crown comprising the steps of:
- coating the surface of a platinum metal strip with a predetermined material composition of finely divided particles of from about 1 to 100% by weight of a noble metal halide in combination with from zero to 99% by weight of noble based metal particles;
- sintering said coated strip at an elevated temperature in a range of between about 1875.degree. F. to 1975.degree. F.
- forming an inner structure for said crown by adapting said strip to a die of a tooth preparation to be restored;
- and
- firing a predetermined number of porcelain layers over said inner structure to form a relatively thick outer coating.
Dependencies are inferred from the claim text.