Ivoclar Vivadent IPS e.max Clinical Guide - Manual (Page 13)

13
Anterior 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 incisal crown third by at least 1.5 mm.
– Reduce the vestibular and/or oral area by at least 1.2 mm.
– 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.
Starting situation Incisal orientation grooves Facial and oral:
marginal orientation groove
Facial: central and incisal
orientation grooves
Facial preparation on
3 levels:
oral concavity
Proximal separation Incisal shortening
of the tooth length
Finishing and smoothing
the preparation
1.0
1.0
1.5
1.2 1.2
Practical procedure for restorations with IPS e.max | Preparation
LS
2
LS
2
ZrO
2
ZrO
2
Clinical pictures: Prof. Dr D. Edelhoff, Germany