DD Bio CW
CoCr-based milling blank
Cobalt based dental alloy for ceramic
DD Bio CW are CoCr-based milling blanks for the fabrication of metal frameworks for metal-ceramic crowns, bridges and fixed restorations. DD Bio CW blanks offer high processing reliability and guarantee precise milling results. The alloy is corrosion-resistant, biocompatible and free of tungsten, nickel, beryllium, indium and gallium.
Excellent results are achieved by using a veneering ceramic that is matched to the CTE of the material using long-term cooling. The bonding oxide formers contained ensure an optimum metal-ceramic bond.
Due to its low hardness (255 HV10), the material is easier to mill and can be polished excellently. This reduces wear on the milling cutters, resulting in longer tool life.
Benefits:
- Highly resistant to corrosion
- Free from nickel, beryllium, indium and gallium
- Better millability due to lower Vickers hardness
- Very good polishing properties
Physikalische Eigenschaften
Physical and mechanical properties | |
---|---|
Density | 8.4 g/cmc |
Solidus-liquidus termperature | 1307-1417°C |
Melting point | 1470°C |
Yield load strength (Rp 0.2) | 395 MPa |
Percentage elongation at fracture | 11% |
Modulus of elasticity | 233 GPa |
Vickers hardness | 255 HV 10 |
Colour | White |
Thermal expansion coefficient 25-500°C | 14.3·10-6 K-1 |
Thermal expansion coefficient 25-600°C | 14.5·10-6 K-1 |
Maximum firing temperature | 980°C |
Suggested ceramics | VITA VM13 |
Cytotoxicity test according to ISO 10993-5 | Passed |
Chemische Zusammensetzung [Gew.%]
Cobalt (Co) | 66 |
Chromium (Cr) | 27 |
Molybdenum (Mo) | 6 |
Others: Si, Mn |