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. Excellent results are achieved by using a veneering ceramic that is matched to the CTE of the material using long-term cooling.

Advantages:

Highly resistant to corrosion
Free from nickel, beryllium, indium and gallium
Better millability due to lower Vickers hardness
Very good polishing properties

Physical Properties

Density	8.4 g/cmc
Solidus-liquidus temperature	1307-1417°C
Melting point	1470°C
Yield load strenght (Rp 0.2)	395MPa
Elongation at break	11%
Modulus of elasticity	233 GPa
Vickers hardness	255 HV10
Color	White
Thermal expansion coefficient 25-500 °C	14.3-10 ⁶ K ¹
Thermal expansion coefficient 25-600 °C	14.5-10 ⁶ K1
Max. firing temperature	980°C
Suggested ceramic types	VITAVM13
Cytoxicity test according to ISO standard 10993-5	Passed

Chemical composition [wt.%]

Cobalt (Co)	66
Chromium (Cr)	27
Molybdenum (Mo)	6
Others: Si, Mn

Further materials