Dentistry – Method or material for testing – treating – restoring – or... – Crown
Patent
1987-03-03
1988-10-11
Wilson, John J.
Dentistry
Method or material for testing, treating, restoring, or...
Crown
4332001, 433206, A61C 510
Patent
active
047767952
ABSTRACT:
The process for making metal artificial tooth parts consists in that an impression of the tooth or jaw to be treated is prepared using an electrically non-conductive material, the inner wall of said impression is coated with a heated low-melting alloy and then the interior is filled up with filling material in which fixing pins are inserted in the case of crowns, inlays and bridges. Alternatively, the impression is filled up with traditional filling materials and an electric conductive coating is produced by vaporizing a metal layer, spraying a conductive lacquer or currentless deposition of an electrically conductive layer. Again, alternatively the impression may be filled up with electrically conductive plastic. The positive pattern so produced is separated from the impression, and there is galvanically applied an intermediate layer of a base metal after which one or more layers of high-melting point metals are galvanically applied to the intermediate layer, the filling material, the innermost electrically conductive layer and the intermediate layer first being then removed and, if desired, porcelain and/or plastic is applied as facing or substitute teeth on the artificial tooth part thus resulting.
REFERENCES:
patent: 397320 (1889-02-01), Ward
patent: 1612605 (1926-12-01), Buenaventura
patent: 3552018 (1971-01-01), Zahn
patent: 3636632 (1972-01-01), Costa et al.
patent: 4363627 (1982-12-01), Windeler
patent: 4562882 (1986-01-01), Alleluia
"Metal Sprayed Models from Elastic Impression Materials, A Preliminary Study" from British Dental Journal, Apr. 1965, S.329-332.
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