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 | Dentsply Sirona Prosthetics | Dentsply Sirona Prosthetics | Dentsply Sirona Prosthetics | Dentsply Sirona Prosthetics | Dentsply Sirona Prosthetics |
| Item | Miracast | G Cast Crown and Bridge Alloy | Option Porcelain Alloy | Special White Porcelain Alloy | Ultima Gold Porcelain Alloy |
| Price | Inquire | Inquire | Inquire | Inquire | Inquire |
| Description | Type III. The dollar-wise choice for mainstream performance and color. Miracast has rich gold color and flexible processing. Easily burnishable when | G Cast is a noble, yellow Crown & Bridge Alloy containing 50 %; gold. This Type III alloy features a micro-fine grain structure and is ideally suited | This alloy started and leads the high palladium revolution. It remains the high strength standard used to measure all other palladium-based ceramic | Special White is a high noble, micro-fine grain Porcelain Alloy, which may be used with most dental porcelains. This well-balanced formula of gold, | Designed for high strength and high sag resistance. Ultima Gold has a silver-free formula for an ideal thermal expansion fro maximum porcelain |
| Composition | Gold: 40.9 %
Platinum: 1 %
Palladium: 4 %
Silver: 9 %
Copper: 38 %
Zinc: Less Than 1 %
Iridium: Less Than 1 % | Gold: 50 %
Palladium: 5 %
Silver: 32 %
Copper: 12 %
Zinc: Less Than 1 %
Iridium: Less Than 1 % | Gold: 2 %
Palladium: 78.8 %
Copper: 8 %
Boron: Less Than 1 %
Gallium: Less Than 1 %
Iridium: Less Than 1 % | Gold: 45 %
Palladium: 39.8 %
Silver: 6.5 %
Indium: Less Than 1 %
Gallium: Less Than 1 %
Tin: Less Than 1 %
Ruthenium: Less Than 1 % | Gold: 2 %
Palladium: 77.1 %
Copper: 8.3 %
Zinc: Less Than 1 %
Indium: Less Than 1 %
Gallium: Less Than 1 %
Ruthenium: Less Than 1 % |
| Hardness | 158 HV | 235 HV | 425 HV | 260 HV | 245 HV |
| Tensile Strength | 340 N/mm2 | 815 N/mm2 | 900 N/mm2 | 620 N/mm2 | Inquire |
| Indications for Use | Crowns
Bridges | MOD Inlays
Single Crowns
Small Bridgework | Implants | Single Crowns
Bridges
Implants | 550 N/mm2 |
| Color | Gold | Gold | White | White | White |
| Compatible Porcelains | Not Available | Not Available | Not Available | Most Dental Porcelains | Inquire |
| Melting Interval | 840° C - 925° C | 860° C - 1,700° C | 1,100° C - 1,190° C | 1,160° C - 1260° C | 1,160° C - 1,280° C |
| Casting Temperature | 1,025° C | 1,125° C | 1,290° C | 1,350° C | 1,345° C |
| Expansion | 39 % | 8 % | 23 % | 10 % | 28 % |
| Get Info | Not Available | Not Available | Not Available | Not Available | Not Available |