Dental alloy with silver content

Details Dental alloy with silver content Dental alloy with silver content

A - Human Necessities

61

K

A61K 6/04 (2006.01) C22C 5/06 (2006.01)

Patent

CA 2461909

Alloys composed of 35.5 to 62.5 % silver, 4.1 to 11.0 % indium, 5 to 37.0 % gold, 0 to 40.0 % platinum, 0 to 35 % palladium, 0 to 9.5 % zinc, tin, gallium, copper, 0 to 2.0 % iridium, rhenium, rhodium, ruthenium, 0 to 5.0 % boron, cobalt, chromium, iron, germanium, niobium, nickel, silicon, tantalum, titanium, manganese, vanadium, the indicated percentages being percentages by weight. On one hand, such alloys are inexpensive, and on the other hand, their physical properties with respect to the coefficient of thermal expansion make them suitable for veneering. Furthermore, they show a desired yellowish colour and improved corrosion resistance and mechanical properties.

L'invention concerne des alliages composés de 35,5 à 62,5 % d'argent; de 4,1 à 11,0 % d'indium; de 5 à 37,0 % d'or; de 0 à 40,0 % de platine; de 0 à 35 % de palladium; de 0 à 9,5 % zinc, d'étain, de gallium, de cuivre; de 0 à 2,0 % d'iridium, de rhénium, de rhodium, de ruthénium; de 0 à 5,0 % de bore, de cobalt, de chrome, de fer, de germanium, de niobium, de nickel, de silicium, de tantale, de titane, de manganèse, de vanadium, lesdits pourcentages étant des pourcentages en poids. Ces alliages sont bon marché, d'une part, et, d'autre part, présentent relativement au coefficient de dilatation thermique des propriétés physiques qui les rendent appropriés pour le placage. Ils présentent en outre une couleur jaunâtre désirée et une résistance à la corrosion et des propriétés mécaniques améliorées.

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