Amann Girrbach ceramill zirconia Série Instructions D'utilisation page 36

A P P L I C A T I O N
▷ Perform the final sintering of the frames according to the following
program:
E N ▪ Heat-up phase: Room temperature to final temperature 1450 °C;
heating rate 5 - 10 K/min
▪ Dwell time at final temperature: 2 hrs
▪ Cooling phase: Final temperature 1450 °C to room temperature
(at least < 200 °C); approx. 5 K/min (approx. 5 hours)
Frames for veneering
Post-processing
If required, the zirconium oxide frames can be reworked after the final
sintering without pressure, using a water-cooled lab turbine and suit-
able diamond grinding points (recommended grain approx. 40 μm).
Frame preparation for veneering
After checking the fitting accuracy, contact points and occlusion:
▷ Clean the interior crown surfaces by means of corundum blasting
(aluminium oxide, 110 μm, pressure ≤ 2 bar) and subsequent
steaming off.
Veneer ceramics
For information on the thermal-expansion coefficient, please refer to
the Technical data (see page 27).
For bridges with more than five units and bridges with massive inter-
mediate units, step-by-step long-term cooling to 500 °C is recom-
mended.
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