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Leo
Leo is a reduced-gold ceramic alloy, suitable for conventional metal-ceramics. The good flow properties during casting and the high heat resistance allow for a wide range of indications.
Indications*
- Inlays
- Onlays, ¾ crowns, crowns
- Telescope crowns, conus crowns
- Bridges
- Wide-span bridges
- Cast posts /cores, bars, attachments
- Partial dentures
Technical Data
| Composition (%): | Au 45.0 | Pd 41.0 | Ag 6.0 | Sn 2.2 | In 3.4 | Ga 1.8 | Re <1.0, Ru <1.0, Li <1.0 |
| ISO | 22674:2016 |
| ADA Class: | High Noble |
| Type / Color: | 4 / White |
| Density (g/cm³) | 13.5 |
| Melting Range (Solidus/Liquidus): | 1225 - 1315 °C |
| Elastic Modulus (GPa): | 140 |
| Porcelain Fired Hardened | |
| Vickers Hardness: | 190 280 |
| Tensile Strength (MPa): | 670 740 |
| 0.2% Proof Stress (MPa): | 450 540 |
| Elongation (%): | 20 18 |
Advantages
- Good casting and flow characteristics
- High heat resistance
- Compatible with conventional metal-ceramics (e.g. IPS Style)
- Wide range of indications
- Certified biocompatibility
Processing Data
| Investment Material: | Phosphate-bonded |
| Preheating / Burn- out Temperature: | 750 - 820 °C |
| Crucible | Ceramic crucible |
| Casting Temperature: | 1370 - 1430 °C |
| Oxidation °C/min/Vacuum: | 950 / 1 / No |
| CTE: | (25 – 500 °C): 13.9 x 10-6 /K |
| Recommended Metal Ceramic: | IPS Style, IPS InLine One, IPS InLine, IPS Inline PoM, IPS Classic, IPS d.SIGN |
| Laser Welding Wire: | Laser Ceramic White |
*See TYPE CLASSIFICATION DUE TO PHYSICAL PROPERTIES