Dentistry – Method or material for testing – treating – restoring – or... – Crown
Patent
1980-10-16
1982-10-26
Mancene, Gene
Dentistry
Method or material for testing, treating, restoring, or...
Crown
433223, A61C 508
Patent
active
043559786
ABSTRACT:
In a method for the production of a gold core for a prepared root-filled tooth, the prepared root canal of the tooth is filled with a gasifiable setting impression material. A prefabricated core patrix, preferably of plastic, which consists of a core portion and a dowel portion, is inserted in the impression material which is allowed to set around the dowel portion for the formation of a core pattern. The core pattern is removed from the tooth and is embedded in a mold material which is heated for the gasification of the pattern, whereupon a gold core is cast in the mold formed after the gasification of the pattern.
A core patrix for the production of a gold core for a prepared root-filled tooth is made as a single piece and consists of a core portion and a dowel portion which has a substantially smaller transverse dimension than the prepared root canal of the tooth. The core patrix is preformed and consists of a gasifiable material. The core portion serves as a pattern for a gold core intended for the fixation of a tooth crown and the dowel portion is insertable in the root canal of the tooth in order there to form a fixation for a gasifiable setting impression material applied to the root canal, the core patrix and the set impression material applied to the dowel portion being usable as a casting pattern for the gold core.
REFERENCES:
patent: 641930 (1900-01-01), Brewster
patent: 731594 (1903-06-01), Mosley
patent: 751592 (1904-02-01), Whiteside
patent: 907949 (1908-12-01), Ballou
patent: 983579 (1911-02-01), Taggart
patent: 1037489 (1912-09-01), Kelsey
patent: 1140539 (1915-05-01), Skinner
patent: 1397067 (1921-11-01), Williams
patent: 2536669 (1951-01-01), Thau-Jensen
patent: 3949476 (1976-04-01), Kahn
Mancene Gene
Wilson John J.
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