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 | Encore Porcelain Alloy | G Cast Crown and Bridge Alloy | Ney-Oro B-20 Crown and Bridge Alloy | Palliag M Crown and Bridge Alloy | Special White Porcelain Alloy |
| Price | Inquire | Inquire | Inquire | Inquire | Inquire |
| Description | Moderately priced mid-range gold alloy. Exceptional strength and proven resistance to margin warping. Encore has a lighter oxide than many competitive | 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 | Type III. Designed as the economical alternative to higher nobility Type III alloys, B-20 retains all of the properties and retains good color. Can be | Palliag M is a Type IV, noble, platinum colored Crown & Bridge Alloy containing 2%; gold. This economical, versatile alloy can be used for all crown | 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, |
| Composition | Gold: 48 %
Palladium: 40 %
Zinc: Less Than 1 %
Indium: Less Than 1 %
Tin: Less Than 1 %
Rhenium: Less Than 1 % | Gold: 50 %
Palladium: 5 %
Silver: 32 %
Copper: 12 %
Zinc: Less Than 1 %
Iridium: Less Than 1 % | Gold: 61.8 %
Palladium: 3 %
Silver: 26 %
Copper: 8 %
Zinc: Less Than 1 %
Iridium: Less Than 1 % | Gold: 2 %
Palladium: 27.4 %
Silver: 58.5 %
Copper: 10.5 %
Zinc: 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 % |
| Hardness | 250 HV | 235 HV | 205 HV | 310 HV | 260 HV |
| Tensile Strength | 592 N/mm2 | 815 N/mm2 | 555 N/mm2 | 940 N/mm2 | 620 N/mm2 |
| Indications for Use | Not Available | MOD Inlays
Single Crowns
Small Bridgework | Not Available | Crown Types Including
Milled Telescopic Crowns
Connectors And Attachments
Long Span Bridges
Cast Partial Dentures | Single Crowns
Bridges
Implants |
| Color | White | Gold | Gold | White | White |
| Compatible Porcelains | Not Available | Not Available | Not Available | Not Available | Most Dental Porcelains |
| Melting Interval | 1,156° C - 1,275° C | 860° C - 1,700° C | 885° C - 950° C | 950° C - 1,040° C | 1,160° C - 1260° C |
| Casting Temperature | 1,385° C | 1,125° C | 1,040° C | 1,200° C | 1,350° C |
| Expansion | 20 % | 8 % | 19 % | 3 % | 10 % |
| Get Info | Not Available | Not Available | Not Available | Not Available | Not Available |