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.
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| Company | Ivoclar Vivadent Inc. | Ivoclar Vivadent Inc. | Ivoclar Vivadent Inc. | Ivoclar Vivadent Inc. |
| Item | IPS d.SIGN 84 Porcelain Alloy | Calisto Implant 33 Alloy | Harmony 3 Crown and Bridge Alloy | Midigold 50 Crown and Bridge Alloy |
| Price | Inquire | Inquire | Inquire | Inquire |
| Description | IPS d.SIGN 84 is a palladium-based ceramic alloy. Its mechanical and physical properties are coordinated with the IPS d.SIGN fluorapatite glass- | Callisto Implant 33 is a reduced-gold ceramic alloy which is especially suitable for the fabrication of implant superstructures as a result of its | 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 low | Midigold 50 is a reduced gold crown and bridge alloy demonstrating outstanding properties. |
| Composition | Palladium : 75.2 %
Gold: 9 %
Indium: 6.5 %
Gallium: 6 %
Silver: 3 %
Ruthenium: Less Than 1 %
Lithium: Less Than 1 %
Rhenium: Less Than 1 % | Palladium: 52.8 %
Gold: 33 %
Silver: 7.2 %
Gallium: 4.1 %
Tin: 2.4 %
Indium: Less Than 1 %
Rhenium: Less Than 1 %
Ruthenium: Less Than1 %
Lithium: 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 % |
| Hardness | 295 HV | 235 HV | 230 HV | 180 HV |
| Tensile Strength | 117 N/mm2 | 500 N/mm2 | 102 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
Implant Superstructures
Model Casts | Inlays
Onlays
3/4 Crowns
Crowns
Ceramic Crowns
Telescopic And Conus Crowns
Posts
Short And Long Span Bridges
Partial Dentures
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 |
| Color | White | White | White | Yellow |
| Melting Interval | 1,140° C - 1,335° C | 1,115° C - 1,305° C | 880° C - 960° C | 825° C - 915° C |
| Casting Temperature | 1,390° C - 1,450° C | 1,370° C - 1,426° C | 1,020° C - 1,050° C | 970° C - 1,030° C |
| Expansion | 29 % | 35 % | 14 % | 6 % |
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