Ivoclar Vivadent Variolink II - Manual (Page 4)

Attention
– Variolink II is a light-/dual-curing material and thus
sensitive to blue light (operatory light, ambient light).
Therefore, Variolink II should be mixed immediately
before application. Avoid intensive light during
application.
– The result of mixing the base pastes (bleach XL 010,
white (110/A1), white opaque, brown (340/A4) with the
catalyst pastes is a mixed colour.
– When mixing is too hard, air may be trapped in the paste.
This may delay polymerization and compromise
mechanical properties.
– Make sure to remove excess material in time, especially
in areas that are difficult to reach (proximal or gingival
margins). Given the hardness of fully polymerized luting
composites like Variolink II, the removal of excess with
rotary or oscillating instruments (finishing diamonds,
discs, Proxoshape, etc.) is extremely difficult and time
consuming.
We recommend the base with the low-viscosity catalyst
paste for the placement of crowns and partial crowns, the
base with the high-viscosity catalyst paste for inlays/onlays
and veneers. The dentist, however, is free to chose the
proper viscosity for each indication.
Should the tooth substance be discoloured, we recommend
using shade white opaque, since this opaque version of
Variolink II has better masking properties.
As veneers demonstrate only limited thickness and thus
high translucency, Variolink II can also be applied with
light-curing only. In that case, only the base paste is used
to place the restoration. The catalyst paste is unnecessary.
Consequently, a selection between different consistencies is
not possible in this case. For controlled direct placement of
Variolink II base utilize a Variolink II application tip.
7.Placement
a) Inlays/Onlays:
Apply mixed Variolink II with a brush or a spatula in the
cavity and/or, if necessary (with concave shapes or to avoid
trapping air), on the inner surface of the restoration.
b) Crowns/bridges:
Apply mixed Variolink II on the inner surface of the
restoration and/or, if necessary (to avoid trapping air), on
the preparation.
c) Veneers:
Apply mixed Variolink II with a brush or a spatula on the
preparation and/or, if necessary, on the inner surface of the
restoration. For direct placement of base alone utilizing the
Variolink II application tip.
Attention
– First, place restoration in situ with slight pressure and
remove excess with a brush or another suitable
instrument.
– When working on large restorations, make sure to
remove excess material in time, especially in areas that
are difficult to reach (proximal or gingival margins).
– Increase pressure and maintain for several seconds.
Remove the Variolink II excess thus forced out with a
brush.
– To aid in the clean-up process maintain the pressure and
tack the restoration on an isolated surface area with
light-polymerization for 10 to 20 seconds.
Important:
At this stage, do not polymerize any proximal or marginal
regions.
– After tacking the restoration in place remove any
additional marginal excess with a spatula or other
suitable instrument. Make sure that Variolink II excess is
not brushed out of the margins.
8. Polymerization
Polymerize Variolink II step by step for at least 40 s per
segment. Begin with the proximal margins (polymerize
through transparent interdental wedges).
Remarks regarding oxygen inhibition
As any other composite, Variolink II is subject to oxygen
inhibition. This means that the surface layer (approx.
50 µm) does not polymerize during light-curing, as it comes
in contact with atmospheric oxygen. This problem can be
solved in two ways:
Variolink II-WE1-GI-NEU.qxd 20.04.2004 09:22 Uhr Seite 4