Ivoclar Vivadent IPS e.max Clinical Guide - Manual (Page 8)

8
Preparation
General preparation guidelines
Successful results can only be achieved with IPS e.max if the preparation guidelines below and
the minimum layer thicknesses are strictly observed.
For the preparation of all-ceramic restorations, the following principles apply:
– No angles or edges
– Shoulder preparation with rounded inner edges and/or chamfer preparation
For CAD/CAM-fabricated restorations, the incisal edge of the preparation should be at least 1.0 mm (milling
tool geometry) in order to permit optimum milling of the incisal area during CAD/CAM processing.
The dimensions indicated in the paragraphs below reflect the minimum thickness for IPS e.max
restorations.
1.0
1.5
Tip
To be able to work in the oral cavity during preparation with as little interference as possible, we recommend
using a lip and cheek retractor as an auxiliary.
OptraGate ® ExtraSoft Version (lip/cheek retractor):
– Even, circular retraction of lips and cheeks
– Considerably enlarged treatment area
– Greater view, better access
Practical procedure for restorations with IPS e.max | Preparation