Ivoclar Vivadent IPS e.max ZirPress - Manual (Page 19)

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1. Contouring for the staining technique
Design the restoration to full anatomical contour so that only requires glazing and, if necessary, characterization after
pressing.
Fully anatomical wax-up made of organic wax on the IPS e.max ZirCAD framework. Observe the minimum and maximum layer thicknesses! Check the occlusal contact points.
2. Contouring for the cut-back technique
In a first step, the restoration is given fully anatomical contours. Then, the cut-back of the wax-up (before investment) is
carried out. As an alternative, the cut-back may also be performed after pressing. In this way, the cut-back technique
enables the fabrication of highly esthetic restorations in a very efficient manner.
Tip
An acrylate polymer block IPS AcrylCAD that fires without leaving residue can be used
instead of modelling wax. An anatomically shaped component is created with the
inLab ® System (Sirona) and waxed onto the zirconium oxide framework.
Reduction of the oral surfaces is not required Secure the ZirCAD framework on the die, attach margins with wax and build-up the shape.
Conduct the wax cut-back and check with a silicone key.
The following points should be observed for the reduction of
the wax-up:
– Reduce the contouring in the incisal third
– No design extreme mamelons (points and edges)
– Check the cut-back with a silicone key
– The minimum thicknesses must be observed to ensure
pressability
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