Crown and Bridge Alloys

Dental crown and bridge alloys are used for casting full contour crowns and bridges. These alloys are generally created from noble and high noble metals with gold colored crowns the most popular. Different alloys are designed with different levels of hardness with softer alloys better suited for smaller restorations such as inlays and onlays, while harder alloys are better suited for crowns and bridges. Casting with crown and bridge alloys requires specific techniques with different alloys melting at different temperatures, so be sure to follow the protocols that deliver the best results for your lab.
CompanyIvoclar Vivadent Inc.Ivoclar Vivadent Inc.Ivoclar Vivadent Inc.
ItemHarmony KF Crown and Bridge AlloyHarmony 3 Crown and Bridge AlloyMidigold 50 Crown and Bridge Alloy
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DescriptionClinically proven high gold crown and bridge alloy demonstrating outstanding properties.Harmony 3 contains 3.5% gold and is a noble alternative to the gold-free base metal casting alloys. What is more, it is very economical due to its lowMidigold 50 is a reduced gold crown and bridge alloy demonstrating outstanding properties.
CompositionGold: 75.1 %
Platinum: 3.2 %
Palladium: 6.8 %
Silver: 10.2 %
Zinc: 2 %
Indium: 2.2 %
Iridium: Less Than 1 %
Tin: Less Than 1 %
Gold: 3.5 %
Palladium: 25.9 %
Silver: 50.8 %
Copper: 13.8 %
Tin: 4.5 %
Zinc: 1.2 %
Rhenium: 1 %
Gold: 50 %
Palladium: 3.5 %
Silver: 35 %
Copper: 9.5 %
Indium: 2 %
Iridium: Less Than 1 %
Hardness225 HV230 HV180 HV
Tensile Strength530 N/mm2102 N/mm2470 N/mm2
Indications for UseInlays
Onlays
Partial Crowns
Single Crowns
Telescope And Conus Crowns
Posts
Short And Long Span Bridges
Implant Superstructures
Inlays
Onlays
3/4 Crowns
Crowns
Telescope And Conus Crowns
Posts
Short And Long Span Bridges
Onlays
3/4 Crowns
Crowns
Telescope And Conus Crowns
Posts
Short And Long Span Bridges
Implant Superstructure
ColorYellowWhiteYellow
Melting Interval970° C - 1,080° C880° C - 960° C825° C - 915° C
Casting Temperature1,135° C - 1,200° C1,020° C - 1,050° C970° C - 1,030° C
Expansion5 %14 %6 %
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