Ivoclar Vivadent IPS e.max Ceram - Manual (Page 25)

25
1 st Dentin and Incisal firing
In order to fabricate highly esthetic restorations, please observe the following procedure:
– Before layering, apply IPS Model Sealer on the model and allow it to dry. Then, isolate the corresponding areas using
IPS Ceramic Separating Liquid.
– Place the framework on the die and make sure it is correctly positioned.
– Mix the required IPS e.max Ceram layering materials with the Build-Up Liquids allround or soft. If a
different consistency of the ceramic is desired, the Liquids may also be mixed with each other at any ratio.
– Use distilled water to rewet the layering materials on the mixing pad to avoid accumulation of organic components.
– Underlay the pontic areas with Deep Dentin in the next lighter shade and make sure that a good rest is reached. After
that, layer these areas using Deep Dentin and Dentin materials.
– The low thermal conductivity of zirconium oxide frameworks provides an insulating effect that in a small number of
cases such as restorations with an abnormally deep occlusal fossa or bulky molar pontics,
present challenges in achieving properly fired veneering ceramic. To optimize the sintering result, control shrinkage and
ensure a well bonded veneer layer, two veneering options may be used:
– Option 1: Intermediate firing
Use Deep Dentin, Dentin or Impulse materials for an intermediate firing to minimize the bulk of veneering ceramic
during the initial build-up. The layering has to cover the complete surface.
– Option 2: Fissure separation
Separate the central fissure from mesial to distal including the marginal ridges with a thin scalpel. This allows optimal
sintering behaviour and results in uniform shrinkage that is easily corrected during the 2 nd Dentin and Incisal firing.
– Subsequently, conduct the layering procedure according to the layering diagram. Observe the necessary layer thicknesses.
– For individual characterizations, use e.g. Occlusal Dentin (see also pages 13–16).
– Carefully remove the restorations from the model and supplement the contact points.
– Do not apply excessive suction and prevent the restoration from drying out.
– Before firing, all the interdental areas must be separated down to the framework using a scalpel.
– Position the restoration on the firing tray and fire using the stipulated firing parameters.
Normal occlusal surface Deep occlusal surface Massive bridge pontic
1 mm
Before layering, apply IPS Model Sealer and allow it to dry. Then, isolate the corresponding areas using IPS Ceramic Separating Liquid.
Pr
ocessing
on
ZrO
2
Frameworks