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 | BiOcclus Porcelain Alloy | Degustar GA-2 Porcelain Alloy | Lunar Porcelain Alloy | Miracast | Ney-Oro #5 Crown and Bridge Alloy |
| Price | Inquire | Inquire | Inquire | Inquire | Inquire |
| Description | BiOcclus 4 is a micro-fine high noble alloy with Type IV strength. The absence of copper and palladium guarantees both tarnish and corrosion | Degustar GA-2 is a noble, micro-fine grain palladium-silver alloy which offers excellent physical properties and represents an outstanding alternative | Superior marginal stability and great compatibility with a wide range of available porcelain systems. Lunar's excellent ductility increases resistance | Type III. The dollar-wise choice for mainstream performance and color. Miracast has rich gold color and flexible processing. Easily burnishable when | Type IV. An excellent choice for cast denture frameworks, long span bridgework and implants. Withstands cold working and adjustments. |
| Composition | Gold: 85.8 %
Platinum: 11 %
Zinc: Less Than 1%
Indium: Less Than 1 %
Rhodium: Less Than 1 %
Tantalum: Less Than 1 % | Gold: 2 %
Palladium: 52 %
Silver: 36 %
Tin: Less Than 1 %
Zinc: Less Than 1 %
Indium: Less Than 1 %
Ruthenium: Less Than 1 % | Palladium: 60 %
Silver: 29.5 %
Iridium: Less Than 1 %
Zinc: Less Than 1 %
Indium: Less Than 1 %
Gallium: Less Than 1 %
Tin: Less Than 1 % | Gold: 40.9 %
Platinum: 1 %
Palladium: 4 %
Silver: 9 %
Copper: 38 %
Zinc: Less Than 1 %
Iridium: Less Than 1 % | Gold: 63 %
Palladium: 5 %
Silver: 19 %
Copper: 12 %
Zinc: Less Than 1 % |
| Hardness | 210 HV | 250 HV | 244 HV | 158 HV | 260 HV |
| Tensile Strength | 530 N/mm2 | 560 N/mm2 | 560 N/mm2 | 340 N/mm2 | 685 MPa |
| Indications for Use | Not Available | Implants
Crowns
Bridgework | All Around Laboratory Use | Crowns
Bridges | Cast Denture Frameworks
Long Span Bridgework
Implants |
| Color | Gold | White | White | Gold | Gold |
| Compatible Porcelains | High Fusing Medium Coefficient Porcelains | Not Available | Wide Range Of Porcelains | Not Available | Not Available |
| Melting Interval | 1,040° C - 1,140° C | 1,150° C - 1,230° C | 1,180° C - 1,290° C | 840° C - 925° C | 890° C - 945° C |
| Casting Temperature | 1,300° C | 1,400° C | 1,370° C | 1,025° C | 1,035° C |
| Expansion | 8 % | 10 % | 35 % | 39 % | 15 % |
| Get Info | Not Available | Not Available | Not Available | Not Available | Not Available |