Dentaltown June 2018 - 100
hand. The composite shade guide should look
as close as possible to the contours and gloss
of the final result. The case that follows, the
individual shade guides were created from
the Uveneer template (Figs. 3-6).
5: Create direct mock-ups.
Having the end result in mind before
starting any case plays a significant role
in the success of any aesthetic work. In
that respect, a simulated direct composite
mock-up without bonding it to the tooth
is highly recommended. Direct mock-up
allows the dentist to effectively view the
final restoration regarding shape and final
shade and take the guesswork out of shade
selection. It is also a great communication
tool with the patient on the final aesthetic
result.
Shade selection mock-up should be
performed on the same tooth you plan
to work on, under a natural humidity (as
dehydration brightens the tooth). It is also
recommended to build the mock-up to the
same thickness of the finished restoration.
Once accurately polished and made into a
realistic representation of the final result,
remove it with the help of an instrument.
One-shade polychromatic
composite veneer
Fig. 3: Composite is applied
into the template.
Fig. 4: Light cured for 30 seconds.
Fig. 5: Composite shell is removed from the template and
glued to a handle.
Fig. 6: Individual shade tab of the
corresponding composite.
100
JUNE 2018 // dentaltown.com
It is a fact that teeth have a polychromatic
appearance with a great variety of shades
and nuances perceived and interpreted
by the human eye. To mimic the natural
gradient effect, dentists learn to apply
multiple composite shades in different areas
of the tooth.
In reality, enamel does not present with
different shades and is somewhat translucent
and colorless. It's perceived as polychromatic
because of the reflection of the dentin through
different thickness of enamel in different
areas of the tooth.
By using a single shade of composite of
varying thickness, a significant difference
in chroma, value and masking capability
will be created.7-8
It is recommended to use the advanced
nanocomposites with a chameleon effect,
in which the composite "picks up" colors
from the underlying teeth.
Another reason for the natural looking
results of using a template are the embedded
surface morphology reflections, which have
a significant influence on appearance. By
pressing a tooth-shaped template upon
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