Lodestar is a classical, reduced-gold ceramic alloy with a high degree of strength for a wide range of indications. The silver-free composition enables reliable processing with conventional metal-ceramics.
Indications*
- Inlays
- Onlays, ¾ crowns, crowns
- Telescope crowns, conus crowns
- Bridges
- Wide-span bridges
- Cast posts / cores, bars, attachments
- Implant-supported superstructures
- Partial dentures
Technical Data
| Composition (%): | Au 51.5 | Pd 38.5 | In 8.5 | Ga 1.5 | Re <1.0, Ru <1.0 |
| ISO | 22674:2016 |
| ADA Class: | High Noble |
| Type / Color: | 4 / White |
| Density (g/cm³) | 13.7 |
| Melting Range (Solidus/Liquidus): | 1175 - 1300 °C |
| Elastic Modulus (GPa): | 125 |
| Porcelain Fired | |
| Vickers Hardness: | 240 |
| Tensile Strength (MPa): | 705 |
| 0.2% Proof Stress (MPa): | 495 |
| Elongation (%): | 20 |
Advantages
- Ag-free
- Good melting and flow characteristics
- Increased strength
- Wide range of indications
- Compatible with conventional metal-ceramics (e.g. IPS Style)
Processing Data
| Investment Material: | Phosphate-bonded |
| Preheating / Burn- out Temperature: | 750 - 820 °C |
| Crucible | Ceramic crucible |
| Casting Temperature: | 1360 - 1410 °C |
| Oxidation °C/min/Vacuum: | 950 / 1 / No |
| CTE: | (25 – 500 °C): 14.1 x 10-6 /K |
| Recommended Metal Ceramic: | IPS Style, IPS InLine One, IPS InLine, IPS Inline PoM, IPS Classic |
| Laser Welding Wire: | Laser Ceramic White |
*See TYPE CLASSIFICATION DUE TO PHYSICAL PROPERTIES