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Framework preparation
Zirconia
For more detailed information regarding fabrication of Cercon and other compatible
frameworks, please consult the Cercon Directions for Use (DFU).
Celtra Press
Celtra Press frameworks should be pressed in anatomical form to support the
ceramic being applied to ensure an even layered thickness of the veneering
material. Fine corrections, e.g. adjustment in the marginal area, are carried out
by using fine diamonds or silicone wheels.
Celtra Press – minimum framework wall thickness /
veneer thickness (mm)*
Technology
Area
Framework wall
Staining
thickness
technique
(fully
contoured)
Framework wall
thickness
Cut-back
Veneering (thickness)
Framework wall
Layering
thickness
technique
Veneering (thickness)
*Connector for 3-unit bridge should have a minimum of a cross-sectional area of 16mm
** For other Lithium Disilicate frameworks use the appropriate recommendations for
minimum wall thickness/veneer thickness (mm), as per the applicable DFUs.
PowerFire (Celtra Press frameworks only)
Use 50-micron sized aluminum oxide at 20 psi pressure and lightly blast the exterior
surface of the ceramic restoration. Care must be taken not to harm the margins.
Use a steam cleaner to clean the surfaces or put the restoration in distilled water
and place in an ultrasonic cleaner for 10 minutes.
PowerFire is a firing program that is carried out before the first ceramic firing of
the veneering porcelain. PowerFire increases the flexural strength of the Celtra
Press restoration to >500 MPa. After PowerFire,
it will reduce the strength of the restoration.
Inlays
1.0
≥ isthmus
Full-arch
width
incisal/occlusal
1.5
Full-arch
-
incisal/occlusal
-
-
full-arch/incisal/
-
occlusal
-
Onlays /
Anterior
Veneers
Tabletops
crowns
1.5
0.6
1.5
0.6
-
0.6
-
0.4
-
0.4
-
-
-
-
0.4 - 0.7
1
blasting must be avoided as
8
Anterior
bridges
Posterior
crowns
Connector cross-section
1.2
1.5
1.2
1.5
1.5
1.5
1.2
1.5
1.2
0.8
0.8
0.8
0.7
0.7
0.7
0.8
0.8
0.8
0.7
0.7
Posterior
bridges
16 mm²
1.5
1.5
1.5
0.8
0.7
0.8
0.7
2
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