Ivoclar Vivadent IPS e.max ZirPress - Manual (Page 62)

62
Finishing
It is of critical importance to use the correct grinding instruments for finishing and adjusting high-strength glass-ceramics. If
unsuitable grinding instruments 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”.
The following procedure is recommended for finishing pressed-over Straumann Anatomic IPS e.max Abutments:
– The adjustment by grinding of pressed IPS e.max ZirPress restorations is kept to a minimum in the staining technique.
– 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 sprue.
– Check the occlusion and articulation and grind in the appropriate adjustments, if necessary.
– Design surface textures.
– To clean the restoration, screw the abutment onto the polishing aid and briefly blast with Al
2
O
3
at 1 bar (15 psi) pressure
and clean with the steam jet. Cover exposed abutment areas with wax!
Use a fine separating disk and continuous water cooling to cut the sprues. Smooth out the attachment points of the sprue using low speed and light pressure and
design a natural surface structure.
Blast the pressed-on IPS e.max ZirPress with Type 1 Al
2
O
3
at 1 bar (15 psi) pressure with the
polishing aid screwed into place.
Before staining and characterization, thoroughly clean the abutment under running water
and with a steam jet.