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	Academy Gold Crown and Bridge Alloy	Callisto Implant 78 Alloy	IPS d.SIGN 84 Porcelain Alloy	Lodestar Porcelain Alloy	Y-2 Porcelain Alloy
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Description	The intense golden yellow colour is identical to the one of plugging gold. This high-precious, palladium-free multiple-purpose alloy (Type 2 / Type 3)	Callisto Implant 78 is a high-gold ceramic alloy. It is especially suitable for implant superstructures.	IPS d.SIGN 84 is a palladium-based ceramic alloy. Its mechanical and physical properties are coordinated with the IPS d.SIGN fluorapatite glass-	Lodestar is a silver-free reduced gold ceramic alloy demonstrating outstanding properties.	Y-2 is a clinically proven high-gold ceramic alloy demonstrating outstanding properties.
Composition	Gold: 77.2 % Silver: 12.7 % Copper: 8.5 % Platinum: Less Than 1 % Indium: Less Than 1 % Iridium: Less Than 1 % Zinc: Less Than 1 % Tantalum: Less Than 1 %	Gold: 78.6 % Platinum: 9.7 % Palladium: 7.9 % Indium: 3.4 % Iron: Less Than 1 % Rhenium: Less Than 1 % Ruthenium: Less Than 1 % Rhodium: Less Than 1 %	Palladium : 75.2 % Gold: 9 % Indium: 6.5 % Gallium: 6 % Silver: 3 % Ruthenium: Less Than 1 % Lithium: Less Than 1 % Rhenium: Less Than 1 %	Gold: 51.5 % Palladium: 38.5 % Indium: 8.5 % Gallium: 1.5 % Ruthenium: Less Than 1 % Rhenium: Less Than 1 %	Gold: 82 % Platinum: 8.1 % Palladium: 4.5 % Silver: 3.7 % Tin: Less Than 1 % Indium: Less Than 1 % Ruthenium: Less Than 1 % Rhenium: Less Than 1 % Iron: Less Than 1 %
Hardness	125 HV	240 HV	295 HV	240 HV	155 HV
Tensile Strength	240 N/mm²	600 N/mm²	117 N/mm²	98 N/mm²	83 N/mm²
Indications for Use	Inlays Onlays Partial Crowns Crowns Short Span Bridges	Onlays Partial Crowns Single Crowns Telescope/Conus Crowns Root Canal Posts Short And Long Span Bridges Implant Superstructures Model Casts	Onlays Inlays Partial Crowns Single Crowns Telescope And Conus Crowns Root Canal Posts Short And Long-Span Bridges Implant Superstructures Model Casts	Onlays Inlays 3/4 Crowns Crowns Telescope And Conus Crowns PFM Crowns Posts Short And Long Span Bridges Implant Superstructures Partial Dentures	Onlays Inlays Partial Crowns Single Crowns Telescope And Conus Crowns Root Canal Posts Short And Long Span Bridges
Color	Yellow Golden	White	White	White	Yellow
Melting Interval	900° C - 940° C	1,135° C - 1,250° C	1,140° C - 1,335° C	1,215° C - 1,290° C	1,105° C - 1,205° C
Casting Temperature	1,035° C - 1,095° C	1,305° C - 1,365° C	1,390° C - 1,450° C	1,350° C - 1,410° C	1,260° C - 1,320° C
Expansion	55 %	5 %	29 %	20 %	12 %
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