Ivoclar Vivadent Vectris - Manual (Page 11)

11
PRODUCT
INFORMA
TION
What do I need to watch out for while carrying
out the sandblasting (conditioning) process?
Use Al 2 O 3 of a grit size of 80 to 100 microns (type 100) at a
pressure of maximum 1 bar (14.5 psi).
How long is the reaction time of the wetting
liquid?
Allow the liquid to react for 1 minute.
CONDITIONING
Can frameworks made of Vectris be veneered
with composites that are not explicitly recom-
mended by the manufacturer?
Fixed, adhesively cemented restorations made of Vectris
must not be veneered with any other materials than those
recommended by the manufacturer. Temporarily cemented
long-term provisional restorations, which are intended to
remain in the oral cavity for no longer than 12 months, may
be veneered with other composites.
VENEERING
What equipment is needed to process Vectris?
A Vectris VS1 framework former is required to process
Vectris.
Can you cut slits into the Vectris Frame?
As Vectris Frame adapts very closely to the die because of the
Transil matrix, it is not necessary to cut slits. In fact, cutting
slits should be avoided, as the fibres would be severed in the
process. This weakens the strength of the restoration.
What happens if the stipulated curing depths
are not observed?
If the stipulated curing depths are not observed, the material
may not be able to polymerize completely. Clinical failure
may ensue.
Is it necessary to sandblast and condition the
pontic before Vectris Frame is applied?
After the vacuum-forming process, any Vectris matrix
material that has been squeezed downwards is carefully
removed with an appropriate instrument. Then, the Vectris
frame is directly applied on the inhibition layer of the pontic
(avoid contamination). Next, the Transil matrix is placed on
the die and the vacuum-forming process in the VS1 is
started. The inhibition layer provides a bond to the Vectris
Frame.
Do you ever sandblast and condition the pontic?
Only sandblast and condition the pontic if you have modified
the pontic surfaces by grinding and removed the inhibition
layer in the process.
V
ACUUM
-
FORMING