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Lodestar

Au (51.5%)-based dental metal-ceramic alloy, Type 4

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

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