Ivoclar Vivadent SR Chromasit - Manual (Page 18)

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Processing procedure for pontics
Step 1:
Sandblast the completed framework with aluminium oxide,
clean with steam (only if you are using SR Chroma Link) and
dry with oil-free compressed air.
Step 2:
Apply SR Chroma Link or SR Link and allow to dry
(SR Chroma Link: 3 to 4 minutes; SR Link: 3 minutes).
After the drying time has elapsed, apply a thin coating of
SR Chromasit Opaquer to the pontic and build up with
SR Chromasit Dentin until the pontic is at the same level as
the abutment crowns.
Step 3:
Next, apply a masking layer of opaquer to the veneering
areas of the abutment crowns as well as to the pontic,
which has been built up with Dentin. Then, polymerize the
object in the Ivomat (with water) at 120 °C (248 °F) and
6 bar pressure for 5 minutes.
Step 4:
Continue with the veneering procedure.
After having left the opaquer to swell, apply it to the
veneering area and polymerize another time at 120 °C
(248 °F) and 6 bar pressure for 5 minutes.
Polymerizing the opaquer
After applying the opaquer, polymerize the material in the
Ivomat (with water) at 120 °C (248 °F) and 6 bar pressure
for 5 minutes.
The opaqued surface must be free of water. If not, a
separation layer between the opaquer and resin forms. To
prevent such a separation layer from occurring, carefully dry
the opaqued surface with compressed oil-free air before
veneering.
Characterizing the opaquer
Depending on the customary techniques of the technician,
the shade of the standard opaquer can be modified by
adding SR Chromasit Intensive Opaquer. For this purpose, a
small quantity of SR Chromasit Intensive Opaquer is added
to the standard opaquer powder during the mixing procedu-
re. Alternatively, mix SR Chromasit Intensive Opaquer with
SR Chromasit Opaquer Liquid and apply the mixture to the
polymerized standard opaquer.
Polymerization parameters for the opaquer
Pressure
6 bar
Time
5 minutes
Temperature
120 °C (248 °F)