Ivoclar Vivadent Variolink Veneer - Manual (Page 3)

7. Application of the bonding agent (see Instructions for Use
of the bonding agent)
8. Variolink Veneer luting techniques
Variolink Veneer is especially recommended for highly translucent,
aesthetic restorations in the anterior region (e.g. veneers). After
selecting a suitable shade, apply Variolink Veneer paste directly to the
inner surfaces of the restoration. For controlled, precise placement
use a Variolink Veneer application tip.
Note:
Variolink Veneer is a light-curing material and thus sensitive to blue
light (operatory light, ambient light). Therefore, Variolink Veneer
should not be dispensed from the syringe until right before use.
Exposure to intensive light should be avoided during application.
9. Placement
a) Inlays/onlays
Use a brush or spatula to apply Variolink Veneer to the cavity and/or
the inner surface of the restoration (to avoid the inclusion of air
bubbles if concavities are present).
b) Veneers
Apply Variolink Veneer directly to the inner surface of the restoration
using a brush or spatula.
10. Removal of excess
a) Conventional technique
– Seat the restoration exerting light pressure and remove gross
excess with a suitable instrument (e.g. spatula, brush).
– Make sure to remove excess material in time, particularly in areas
that are dif-ficult to reach (proximal or gingival margins).
– Increase pressure and maintain for several seconds.
–Maintain the pressure and light-cure a small area with a small light
probe for a few seconds to tack the restoration into place.
Important: Do not light-cure any proximal or marginal
regions!
– Remove further excess with a suitable instrument. When doing this,
take care not to wipe any material out of the marginal areas.
– Thoroughly light-cure each section for 10-30 seconds, depending
on the light intensity of the curing unit used.
b) “Complete curing technique”
– Seat the restoration exerting light pressure.
– Maintain the pressure and light-cure a small area with a small light
probe for 10 seconds to tack the restoration into place
– Thoroughly light-cure each section for 10–30 seconds.
– Variolink Veneer excess may be removed using suitable
instruments (e.g. chipping it away with a probe or scaler).
c) “ Wave technique”
– Seat the restoration exerting light pressure.
– Maintain pressure on the restoration and wave the light guide of a
curing light from a distance of 2–3 cm across the gingival areas of
the restorations for 2–3 seconds, initiating the cement to a “semi-
set” stage. Use an explorer to touch the cement and verify the
“semi-set” stage which demonstrates a solid, rubbery consistency.
Additional cure time may be required to achieve the desired
consistency.
– Larger pieces of excess Variolink Veneer can be easily removed
from the margins and interproximally. Remove all excess cement.
– Thoroughly light-cure from all aspects for 10–30 seconds.
– Note: The Wave Technique is time, intensity, and distance
dependant. It is critical to find the combination of variables that
work using your own experience.
Notes on oxygen inhibition
As all composite resins, Variolink Veneer is subject to oxygen
inhibition. This means that the surface layer (approx. 50 µm in
height), which is exposed to atmospheric oxygen during the curing
process, does not polymerize. There are two different ways to
overcome this problem:
1) Leave excess Variolink Veneer in place. Thus, only the excess is
affected by oxygen inhibition and can easily be removed after
polymerization when finishing of the margin is performed.
2) Cover restoration margins with Liquid-Strip (glycerine gel) after
the removal of excess, but prior to polymerization. In this way,
oxygen inhibition is prevented.
Notes on the curing unit
The curing time per section is strongly dependent on the light
intensity achieved by the curing unit. As many different types of
curing lights are currently available (quartz halogen lights, laser
lights, LED lights) we ask you to refer to the manufacturer’s operating
manual for the appropriate curing times.
11. Finishing and polishing
– Remove any excess material using finishing diamonds (grit-size
below 25 µm) and flexible polishing discs.
– Apply finishing and polishing strips in the proximal regions.
– Verify occlusion and adjust if required. Any adjustments can be
made with finishing diamonds operated at a speed of
3000–7000 rpm, exerting light pressure. Ground areas need to be
repolished.
– Polish restoration margins with silicone polishers (Politip ® -F/-P,
Astropol ® ) or polishing discs.