Preparation – Ivoclar Vivadent IPS e.max Clinical Guide User Manual
Page 14
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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