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 | G Cast Crown and Bridge Alloy | Ney-Oro #5 Crown and Bridge Alloy | Ney-Oro 41 Crown and Bridge Alloy | Ney-Oro A-1 Crown and Bridge Alloy | Ultima Lite Porcelain Alloy |
| Price | Inquire | Inquire | Inquire | Inquire | Inquire |
| Description | 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 IV. An excellent choice for cast denture frameworks, long span bridgework and implants. Withstands cold working and adjustments. | Type III. The unique, copper-free formulation is the secret to the exceptional strength and gold color. Low density for more units per ounce. An | Type II. Yellow gold color. High ductility yet strong enough for a firm resistance to occlusal pressure. Premium Type II performance for inlays and | Proven superior marginal integrity. This noble palladium alloy delivers superior fitting restorations. Ideal mid-range thermal expansion value means |
| Composition | Gold: 50 %
Palladium: 5 %
Silver: 32 %
Copper: 12 %
Zinc: Less Than 1 %
Iridium: Less Than 1 % | Gold: 63 %
Palladium: 5 %
Silver: 19 %
Copper: 12 %
Zinc: Less Than 1 % | Gold: 20 %
Platinum: 1 %
Palladium: 21 %
Silver: 38.5 %
Zinc: Less Than 1 %
Indium: Less Than 1 % | Gold: 77.5 %
Palladium: 2 %
Silver: 12.5 %
Copper: 7.3 %
Zinc: Less Than 1 % | Palladium: 78.4 %
Copper: 8 %
Zinc: Less Than 1 %
Indium: Less Than 1 %
Gallium: Less Than 1 %
Ruthenium: Less Than 1 % |
| Hardness | 235 HV | 260 HV | 185 HV | 125 HV | 300 HV |
| Tensile Strength | 815 N/mm2 | 685 MPa | 405 N/mm2 | 230 N/mm2 | 565 N/mm2 |
| Indications for Use | MOD Inlays
Single Crowns
Small Bridgework | Cast Denture Frameworks
Long Span Bridgework
Implants | Flat Rate Noble Crowns | Inlays
Single Crowns
Partial Dentures
Long Span Bridgework
Milled Restorations | Not Available |
| Color | Gold | Gold | Gold | Gold | White |
| Melting Interval | 860° C - 1,700° C | 890° C - 945° C | 860° C - 1,035° C | 928° C - 968° C | 1,175° C - 1,255° C |
| Casting Temperature | 1,125° C | 1,035° C | 1,130° C | 1,060° C | 1,345° C |
| Expansion | 8 % | 15 % | 6 % | 48 % | 15 % |
| Get Info | Not Available | Not Available | Not Available | Not Available | Not Available |