Dental alloys for composite and porcelain overlays

Details Dental alloys for composite and porcelain overlays Dental alloys for composite and porcelain overlays

1993-11-10

1995-10-31

Jones, W. Gary

Dentistry

Prosthodontics

Tooth construction

4332001, 420505, 420508, 420509, 420510, 420511, 420580, 420589, 148430, 148442, A61C 1308

Patent

active

054624371

ABSTRACT:
A dental alloy is provided which is compatible with a wide variety of composites and porcelain compositions. The alloy has a melting range of between about 870.degree. C. and 1230.degree. C. and a coefficient of thermal expansion of between 15.5.times.10.sup.-6 and 17.5.times.10.sup.-6 in/in/.degree. C. when heated from room temperature to 500.degree. C. The alloy contains between one and 85 percent by weight gold, between two and 65 percent by weight of a thermal expansion adjuster, between 0.25 and 34 percent by weight of a strengthener and oxide former, up to about one percent by weight grain refiner, and up to about 0.25 percent by weight deoxidizer.

REFERENCES:
patent: 3981723 (1976-09-01), Tuccillo
patent: 4201577 (1980-05-01), Ingersoll et al.
patent: 4297266 (1981-10-01), Ibsen et al.
patent: 4604366 (1986-08-01), Kacicz et al.
patent: 4804517 (1989-02-01), Schaffer et al.
patent: 5221207 (1993-06-01), Schoeck et al.
patent: 5276068 (1994-01-01), Waknine

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