Dental alloys for porcelain-fused-to-metal restorations

Details Dental alloys for porcelain-fused-to-metal restorations Dental alloys for porcelain-fused-to-metal restorations

1982-07-21

1983-12-06

Hearn, Brian E.

Alloys or metallic compositions

Palladium base

Copper containing

420508, 420580, 420587, C22C 504, C22C 3002

Patent

active

044193254

ABSTRACT:
A dental alloy for use in porcelain-fused-to-metal restorations including palladium, cobalt, gallium, gold, aluminum, copper and ruthenium or rhenium. The cobalt controls the coefficient of thermal expansion of the alloy to permit the use of the alloy with commercially available porcelains having a variety of thermal coefficients. The ruthenium of rhenium provides grain refining for the alloy to increase its elongation, tensile strength, and thus toughness. The alloy with ruthenium or rhenium as a grain refining agent must be made under vacuum or in an inert atmosphere to avoid the formation of bubbles in the porcelain during the porcelain firing process.

REFERENCES:
patent: 2050077 (1936-11-01), Wise
patent: 2105312 (1938-03-01), Cohn
patent: 2132116 (1938-10-01), Kiepe
patent: 2143217 (1939-01-01), Truthe
patent: 2172512 (1939-09-01), Kilgallon
patent: 3134671 (1964-05-01), Prosen
patent: 3155467 (1964-11-01), Yamamoto et al.
patent: 3438770 (1969-06-01), Clark et al.
patent: 3666540 (1972-05-01), Burnett
patent: 3819366 (1974-06-01), Katz
patent: 3928913 (1975-12-01), Schaffer
patent: 3989515 (1976-10-01), Reiff
patent: 4063937 (1977-11-01), Goltsov et al.
patent: 4123262 (1978-10-01), Cascone
patent: 4124382 (1978-11-01), Prosen
patent: 4179286 (1979-12-01), Knosp
patent: 4179288 (1979-12-01), Prosen
patent: 4205982 (1980-06-01), German
patent: 4261744 (1981-04-01), Boyajian
patent: 4266973 (1981-05-01), Guzowski et al.
patent: 4319877 (1982-01-01), Boyajian
patent: 4387072 (1983-10-01), Schaffer

Affiliated with

Also associated with

Rating

Dental alloys for porcelain-fused-to-metal restorations does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Dental alloys for porcelain-fused-to-metal restorations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dental alloys for porcelain-fused-to-metal restorations will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2029414