Ivoclar Vivadent SR Chromasit - Manual (Page 24)

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Contraindication
– occlusal veneers on molars
– layer thickness of less than 1.5 mm
Important notes
– If the layer thickness of the crown and the pontic are sig-
nificantly different in the labial region, the shade effect
may be compromised because of the inherent properties
of translucent materials.
– In order as not to compromise the shade effect, the opa-
qued pontic can be characterized with SR Chromasit
Intensive Opaquer and/or built up with SR Chromasit
Creative or SR Chromasit Dentin, which has been modi-
fied with SR Chromasit Intensive, so that approximately
the same layer thickness is used on the entire bridge.
After that, the Dentin and Incisal materials are applied as
usual.
– There must be sufficient space between the metal frame-
work and the antagonist (1.5 mm) so that the layering
material can be applied in the required thickness
(1.5 mm). Thinner thicknesses may result in the
material chipping off.
– If the space available is less than 1.5 mm, an occlusal
metal surface should be preferred.
– After completing the restoration, make appropriate grin-
ding adjustments in the articulator, paying particular
attention to the centric and masticatory movements to
prevent inappropriate stresses from occurring.
First, apply the Dentin material to the cervical region…
Apply a coat of SR Chromasit Fluid to the veneering surface and then polymerize.
… after that, contour the labial and lingual aspects and add Incisal material.
Processing instructions for fully
veneered restorations
Preparing the framework
The occlusal space between the metal framework and the
antagonist should be at least 1.5 mm in order to provide
sufficient space for the veneering material. In addition, the
minimum thickness of the metal (0.3 mm) has to be taken
into account.
Condition the framework and apply the bonding system and
opaquer as described on page 17.
Layering technique
Separate plaster surfaces using Separating Fluid. Next, apply
Dentin material, first to the cervical area and after that,
adapt the material in the labial and lingual areas and finally,
adapt the material on the occlusal surface, according to the
layering diagram. Remove the fully layered restoration from
the model and add Incisal material to the contact areas.