Ivoclar Vivadent IPS e.max Clinical Guide - Manual (Page 12)

12
Partial crown
– Make sure that the preparation margins are not located in the area of static or dynamic
antagonist contacts.
– Provide at least 1.5 mm of space in the cusp areas.
– Prepare a circular shoulder with rounded inner edges or a chamfer at an angle of
approximately 20 to 30 degrees.
– Ensure that the width of the shoulder/chamfer is at least 1.0 mm.
Starting situation Opening the cavity,
occlusal orientation grooves
Occlusal and oral reduction
of the cusp
Creating the circular
preparation margin
Smoothing the cusps Proximal preparation Proximal preparation Finished and smoothed
preparation
1.5
1.5
1.5
1.0
1.5
Practical procedure for restorations with IPS e.max | Preparation
LS
2
Clinical pictures: Prof. Dr D. Edelhoff, Germany