Dental alloys for porcelain-fused-to-metal restorations

Alloys or metallic compositions – Palladium base – Copper containing

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

420508, 420580, 420587, 420463, 433222, 433207, C22C 504, C22C 3002

Patent

active

044516398

ABSTRACT:
A dental alloy for use in porcelain-fused-to-metal restorations including palladium, cobalt, gallium, gold, aluminum, copper, zinc 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 zinc serves as a scavenger during formation and casting of the alloy. The aluminum protects the alloy from absorbing gases during torch melting and during the porcelain firing process. The ruthenium or 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 in a protective environment to avoid the formation of bubbles in the procelain during the procelain firing process.

REFERENCES:
patent: 2050077 (1936-08-01), Wise
patent: 2105312 (1938-01-01), 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 (1969-04-01), Clark et al.
patent: 3666540 (1972-05-01), Burnett
patent: 3819366 (1974-06-01), Katz
patent: 3928913 (1975-12-01), Schaffer
patent: 3989515 (1976-11-01), Reiff
patent: 4063937 (1977-12-01), 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 (1982-03-01), Boyajian
patent: 4387072 (1983-06-01), Schaffer
patent: 4419325 (1983-12-01), Prasad
Information Card Published by Williams Gold Company re Athenium Alloy.
Information Card Published by J. M. Ney Company re Option Alloy.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

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

     

Profile ID: LFUS-PAI-O-1398756

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.