Ivoclar Vivadent IPS e.max CAD-on - Manual (Page 17)

17
Clinical
W
orking
Steps,
Model
Fabrication
Model Preparation
Please observe the instructions of the manufacturer of the CAD/CAM system for the selection of the
model material.
Important for the fabrication of models :
− Check the radius of the incisal/occlusal edge on the prepared tooth (maxilla and mandible).
− The prepared incisal/occlusal edge should be at least as thick as the diameter of the bur used in the
cavity during the CAD/CAM process.
− If the incisal/occlusal edge of the prepared die is thinner than the diameter of the bur, the edge has to
be blocked out accordingly.
− The preparation margins must be clearly defined so that they are clearly recorded during scanning.
− Do not apply a die varnish or spacer.
− In clinical cases with a very thin alveolar ridge, the lingual/palatal side of the ridge must be
supplemented with putty silicone or a similar material. This allows the dimensions of the bridge pontic
to be correctly designed during the subsequent design of the restoration.
A stone model is used as a working model.
In clinical cases with a very thin alveolar ridge, the lingual/palatal side must be blocked out on the model.