Ivoclar Vivadent IPS e.max Clinical Guide - Manual (Page 14)

14
Starting situation Opening the central fissure Occlusal
orientation grooves
Vestibular preparation
Marginal preparation Proximal preparation Occlusal preparation Finishing and smoothing
the preparation
1.5
1.0 1.0
1.5
1.5
1.5
1.5
6°
1.0 1.0
1.5 1.5
6°
1.2
1.2 1.2
Practical procedure for restorations with IPS e.max | Preparation
LS
2
ZrO
2
Posterior crown
− Evenly reduce the anatomical shape while observing the stipulated minimum
thicknesses.
– Prepare a circular shoulder with rounded inner edges or a chamfer at an
angle of approximately 10 to 30 degrees. Ensure that the width of the circular
shoulder/chamfer is at least 1.0 mm.
– Reduce the occlusal crown third by at least 1.5 mm.
− Reduce the buccal or palatal/lingual area by at least 1.5 mm for LS
2
and by at least 1.2 mm for ZrO
2
.
– For conventional and/or self-adhesive cementation, make sure that the preparation demonstrates retentive
surfaces and a sufficient preparation height of at least 4.0 mm.
LS
2
ZrO
2
Clinical pictures: Prof. Dr D. Edelhoff, Germany