Dental alloy
AssigneeDegudent GmbH
InventorsJoerg HACHENBERG, Rudi STEINKE, Angela KLAUS, Irmgard WISSEL
Life of this patent
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Abstract
A palladium-dominated dental alloy, in particular a ceramic-bonding dental alloy for the manufacture of dental prostheses such as crowns, bridges, inlays, or onlays, containing at least gold, palladium, and silver, as well as a grain-growth inhibitor in the form of ruthenium. In order to achieve a fine-grained separation without the formation of agglomerates to obtain a dental alloy with high mechanical stability and excellent polishing characteristics, it is proposed that the dental alloy contain—in addition to ruthenium as grain-growth inhibitor—at least one element of the group tantalum, niobium, yttrium, zirconium, chromium, and molybdenum as grain-refinement control element.
Claims12
A palladium-dominated dental alloy, in particular a ceramic-bonding dental alloy for the manufacture of dental prostheses such as crowns, bridges, inlays, or onlays, consisting essentially of at least gold, palladium, and silver, as well as one grain-growth inhibitor in the form of ruthenium, wherein in addition to ruthenium as grain-growth inhibitor, the dental alloy contains at least one element selected from the group consisting of tantalum, niobium, yttrium, zirconium, chromium, and molybdenum as grain-refinement control element, whereby the dental alloy consists essentially of (in % by weight):
- 0.03 to 1
- ruthenium
- 0.03 to 2
- grain-refinement control element
- 0 to 10
- tin
- 0 to 10
- zinc
- 0 to 10
- indium
- 0 to 10
- copper
- 0 to 1
- gallium
- 0 to 10
- platinum
- 0 to 2
- iridium
- 0 to 2
- rhodium
- 0 to 2
- germanium
- 0 to 2
- aluminium
- 0 to 2
- silicon
- 0 to 2
- cerium
- 0 to 2
- lanthanum
- 0 to 2
- iron,
- with the remainder being gold, palladium, and silver,
- whereby the total sum of elements adds up to 100% by weight.
Dependencies are inferred from the claim text.