The significant difference with the wet milling of zirconia is the need to let the water evaporate from the zirconia prior to staining and sintering.
Below you will find the recommended procedure for post-processing wet milled zirconia.
1,Extract the disc from the mill;
2,Remove excess water using an air gun, or paper towel, with the units still in the disc;
3,Remove units from disc and reduce remnants of support pins in the same method used with dry milling;
4,Use an air gun to remove any excess Zirconia dust paying special attention to the inner prep area. (ZIRCONIA DUST WILL BOND TO THE CROWN DURING SINTERING AND AFFECT FIT)
5,Dry the units (there are a few methods to accomplish this): **IF NO STAINING IS TO BE COMPLETED AN IDLE STEP CAN BE PROGRAMMED IN MOST SINTERING FURNACES PRIOR TO FIRST RAMP UP WHICH ENABLES THE CROWNS TO BE PLACED IN THE FURNACE IMMEDIATELY**
a. Bench set. (size of the unit will dictate the time needed)
b. Use a dehydrator.
c. Use a heat lamp (careful not to place the lamp too close or leave the units too long)
d. Use a standard convection/toaster oven. (recommended)
** ZIRCONIA’S PROPERTIES WITH LIQUID CAN EASILY BE COMPARED TO A SPONGE. IT CAN ONLY
ABSORB A CERTAIN AMOUNT OF LIQUID. IF WATER IS STILL PRESENT PRIOR TO STAINING, THE SHADES WILL COME OUT LIGHTER THAN INTENDED. **
6. Once dried, the staining of zirconia will be the same as with dry-milled zirconia and is a function
of the stains being used.
7. The sintering of zirconia should respect the Zirconia manufacturer's sintering parameters andnot the sintering oven's capabilities.