Preparation

A careful preparation is decisive for the durability and accuracy of fit of a restoration.

Therefore, design the margin carefully with a circular shoulder or chamfer preparation with rounded inner edges. Avoid any sharp transitions, inner angles, and feather edges. If the restorations are seated with the adhesive cementation technique, the preparation can be restricted to the actual defect.

Observe the necessary minimum wall thickness in order to ensure the adequate stability of the restoration. In conjunction with IPS e.max, it is important to strictly observe the recommended range of indications, preparation guidelines and connector widths.

Preparation - Glass ceramics

IPS e.max Press and IPS e.max CAD

In regard to IPS e.max CAD, please note:
The incisal edge of the prepared tooth should be at least 1 mm (milling tool dimensions), in order to enable optimum milling of the incisal area during the computer-aided manufacturing process.

Preparation - Zirconium oxide ceramics

IPS e.max ZirCAD
The incisal edge of the prepared tooth should be at least 1 mm (milling tool dimensions), in order to enable optimum milling of the incisal area during the computer-aided manufacturing process.