Ivoclar Vivadent IPS e.max ZirPress - Manual (Page 42)

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The layering technique is used in particular for pressing a dentin core or shoulder onto zirconium oxide frameworks.
Individual and highly esthetic restorations can be fabricated using the IPS e.max Ceram layering materials.
Finishing
It is of critical importance to use the correct grinding instruments for
finishing and adjusting glass-ceramics. If unsuitable grinding instru-
ments are used, chipping of the edges and local overheating may
occur (please observe the Ivoclar Vivadent Flow Chart ”Recommended
grinding tools for PS e.max glass-ceramics”.
Observe the following procedure for finishing IPS e.max ZirPress
restorations:
– Separate the sprues with a fine diamond disk under permanent
water cooling of the cutting area.
– Overheating of the ceramic must be avoided. Low speed and light
pressure is recommended.
– Smooth out the attachment points of the sprues.
– Do not ”post-separate” the framework connectors with separating disks. This may result in undesired predetermined
breaking points, which will subsequently compromise the stability of the all-ceramic restoration.
– To clean the restoration, briefly blast with Al
2
O
3
at 1 bar (15 psi) pressure and clean with the steam jet.
– Do not blast ZirLiner or only very carefully in order not to remove it.
– Some blasting devices may require different pressure settings to accomplish this procedure.
Veneering with IPS e.max Ceram
The following paragraphs will explain the most important veneering steps. For further
information on the nano-fluorapatite layering ceramic and its processing, please refer
to the IPS e.max Ceram Instructions for Use.
e.max
®
ZirPress
Layering Technique
IP
S
Restoration after divesting