Ivoclar Vivadent IPS e.max CAD Chairside v.1 - Handbuch (Seite 92)

40
e.max
® CAD
–
Seating and Follow-Up Care
IPS
Possibilities for Cementation
Esthetic cementation options are crucial for the harmonic shade effect of all-ceramic restorations. Depending on the indica-
tion, IPS e.max CAD restorations may be placed using the adhesive, self-adhesive or the conventional cementation tech-
nique.
– For the adhesive cementation of IPS e.max CAD restorations, Variolink ® II, Variolink ® Veneer or Multilink ® Automix are
the ideal composites.
– If IPS e.max CAD restorations are cemented conventionally, we recommend using the glass-ionomer cement
Vivaglass ® CEM*.
– Powder-liquid systems are used for the self-adhesive cementation technique.
Definition
• Adhesive cementation
In the adhesive cementation technique, bonding is achieved also through mechanical adhesion, but mainly through
chemical/micromechanical adhesion between the cementation material and the restoration and between the cementa-
tion material and the preparation. Due to the chemical/micromechanical bonding, a retentive preparation is not required.
Depending on the cementation material, specific adhesive systems are used on prepared teeth in order to achieve the
micromechanical bond to dentin or enamel.
Adhesive cementation increases the “(overall) strength” of the incorporated all-ceramic restoration.
• Self-adhesive cementation
The cementation material shows self-etching properties on the tooth, but not on the restoration. Therefore, the tooth
surface does not need to be specifically conditioned. The bond is generated in part by micromechanical/chemical adhe-
sion. In order to achieve sufficient bonding strengths, a retentive preparation is recommended.
• Conventional cementation
In the conventional cementation technique, the bond is achieved nearly exclusively through mechanical friction between
the cementation material and the restoration as well as between the cementation material and the preparation. In order
to obtain the required mechanical friction, a retentive preparation showing a preparation angle of approximately 4 - 6° is
required.
* the range of products on offer may vary from country to country