Side-by-side comparison of Dental Alloys

Dental alloys are used for a casting a range of restorations, copings, frames and more. These alloys can be composed of a range of noble, high noble and base metals, and each mixture offers different properties that can make one alloy ideal for a specific restorative situation and another alloy completely unsuited to the same task. Full contour crowns and bridges are most often case from noble and high noble metals such as gold and platinum, but these softer metals might not be suited for posterior crowns on a bruxing patient. A wider range of alloys can be used for casting copings and substructures for porcelain-fused-to-metal (PFM) restorations. It is important to coordinate the alloy and the ceramic systems being used for a PFM restoration. Casting dental 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.


Company	Ivoclar Vivadent Inc.	Ivoclar Vivadent Inc.	Ivoclar Vivadent Inc.	Ivoclar Vivadent Inc.	Ivoclar Vivadent Inc.
Item	Aries Porcelain Alloy	Academy Gold XH Crown and Bridge Alloy	Harmony Medium Crown and Bridge Alloy	IPS d.SIGN 59 Porcelain Alloy	Midigold 50 Crown and Bridge Alloy
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Description	Aries is a clinically proven palladium-based ceramic alloy demonstrating outstanding properties.	Clinically proven high gold crown and bridge alloy demonstrating outstanding properties.	Clinically proven high gold crown and bridge alloy demonstrating outstanding properties.	IPS d.SIGN 59 is a palladium-silver ceramic alloy. Its mechanical and physical properties are coordinated with the IPS d.SIGN fluorapatite glass-	Midigold 50 is a reduced gold crown and bridge alloy demonstrating outstanding properties.
Composition	Palladium: 63.7 % Silver: 26 % Tin: 7 % Gallium: 1.8 % Indium: 1.5 % Ruthenium: Less Than 1 % Rhenium: Less Than 1 %	Gold: 70.7 % Platinum: 3.6 % Silver: 13.7 % Copper: 10 % Zinc: 1 % Tin: 1 % Iridium: Less Than 1 %	Gold: 76.8 % Silver: 12.8 % Copper: 8.3 % Palladium: Less Than 1 % Zinc: Less Than 1 % Indium: Less Than 1 % Iridium: Less Than 1 %	Palladium: 59.2 % Silver: 27.9 % Tin: 8.2% Indium: 2.7 % Zinc: 1.3 % Platinum: Less Than 1 % Rhenium : Less Than 1 % Ruthenium: Less Than 1 % Lithium: Less Than 1 %	Gold: 50 % Palladium: 3.5 % Silver: 35 % Copper: 9.5 % Indium: 2 % Iridium: Less Than 1 %
Hardness	195 HV	220 HV	120 HV	230 HV	180 HV
Tensile Strength	98 N/mm²	505 N/mm²	235 N/mm²	139 N/mm²	470 N/mm²
Indications for Use	Onlays Inlays Partial Crowns Single Crowns Telescope And Conus Crowns Root Canal Posts Short And Long Span Bridges	Onlays Partial Crowns Single Crowns Telescope And Conus Crowns Posts Short And Long Span Bridges Implant Superstructures	Inlays Onlays Partial Crowns Single Crowns Short Span Bridges	Onlays Inlays Partial Crowns Single Crowns Telescope And Conus Crowns Root Canal Posts Short And Long Span Bridges Implant Superstructures Model Casts	Onlays 3/4 Crowns Crowns Telescope And Conus Crowns Posts Short And Long Span Bridges Implant Superstructure
Color	White	Yellow	Rich Yellow	White	Yellow
Melting Interval	1,165° C - 1,290° C	860° C - 925° C	880° C - 945° C	1,230° C - 1,310° C	825° C - 915° C
Casting Temperature	1,345° C - 1,405° C	980° C - 1,040° C	1,000° C - 1,060° C	1,365° C - 1,425° C	970° C - 1,030° C
Expansion	46 %	5 %	40 %	14 %	6 %
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