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Leo

Au (45.0%)-based dental metal-ceramic alloy, Type 4
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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
  • Tested 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
Laser Welding Wire: Laser Ceramic White

*See TYPE CLASSIFICATION DUE TO PHYSICAL PROPERTIES

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