Ivoclar Vivadent IPS e.max ZirPress - Manual (Page 18)

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Contour the restoration in accordance with the desired processing technique (staining, cut-back or layering technique).
Please observe the following basic guidelines:
– Isolate the plaster dies with a commercial plaster-wax separator.
– Use only organic waxes for contouring, since they fire without leaving residue.
– Secure the framework on the model in the correct position and attach the margins with wax.
– Exactly contour the restoration, particularly in the area of the preparation margins. Do not over-contour the preparation
margins, since this would require time-consuming and risky fitting procedures after pressing.
– For fully anatomical restorations, the possible occlusal relief must be taken into consideration as early as during the wax-
up, since the application of the Stains and Glaze results in slight increase in vertical dimensions.
Observe the following minimum and maximum layer thicknesses during contouring for pressing IPS e.max ZirPress.
– In order to ensure the desired tooth shade as well as complete pressing, a minimum thickness of 0.7 mm must be
observed.
– Unsupported press and layering ceramic components must not exceed a total thickness of 2.5 mm.
Contouring
– In order to check the wax thickness after contouring, measure the ZirCAD framework with a sensor and record the
values.
– Weigh the IPS e.max ZirCAD framework with the fired IPS e.max Ceram ZirLiner and record the weight. The weight is
used to determine the wax weight after contouring. The wax weight is used to determine the number of required
ingots.
Measure and record the framework thickness including the fired ZirLiner. Weigh the ZirCAD framework with the fired ZirLiner and record the weight.