Page 38 - CEREC Q3 | 2014

36 | CERECDOCTORS.COM | QUARTER 3 | 2014
This is especially true when there are
craze lines or other defects that need
to be replicated. However, when the
natural teeth do not have these types
of conditions, characterization is not
necessary. In the following case, the
ability to use texture and a systematic
polishing technique will be
shown to allow for life-like
restorations that blend into
the natural dentition.
restoring of anterior teeth can
be a tricky undertaking. The nuances of
texture, shade, translucency and shape
make it hard when doing a full smile
makeover — let alone when trying
to match one or two restorations to
natural teeth.
Some cases will need to have charac-
terization to match the adjacent teeth.
CASE STUDY ||| BY DARIN O’BRYAN, D.D.S.
CASE STUDY
The patient had peg laterals that had
been veneered in composite previously
(Fig. 1). The patient wasn’t happy with
the esthetics of the composite veneers.
The contour, shade and texture were all
in need of improvement. The patient was
happy with the length, but the compos-
ites were too bulky and did not flow
Once thepreliminary imagingwasdone,
the teeth were prepared for the resto-
rations. Using depth-cutting burs from
the Robert Winter Anterior design kit,
the initial facial reduction is determined
(Fig. 2). Byusingdepth-cutting burs, equal
reduction isperformedonboth teeth. This
is imperative to get the same translucency
and optics on each restoration.
3 4
1 2
Restoring Peg Laterals:
How Texture and Polish
Affect a Veneer
Fig. 1: Pre-op composite
veneers #7 and#10
Fig. 2: Initial facial
reduction
Fig. 3: Preparations
Fig. 4: Move tool
Fig. 5: Grid function
Fig. 6: Initial gingival
proposal
Fig. 7: Gingiva mask/
Biocopy overlay
Fig. 8: Viewing line angles
Fig. 9: Texture influence on
light reflection
harmoniously with her natural teeth.
After administration of 4 percent
septocaine, an OptraGate (Ivoclar) was
placed and a Biocopy or gingival mask
folder is added and subsequent imaging
of the anterior maxilla is performed.
This is then copied into the upper arch
catalog. Then #7 and #10 were cut out
of the upper image catalog with the
cut tool. The lower arch was then also
imaged.
If the reduction is uneven between
the two teeth, then the thickness of
material will vary between the two. The
variance of material thickness will affect
the amount of light that passes through,
and how much natural underlying tooth
structure there is will affect the restora-
tion’s appearance. The thicker the mate-
rial, the more “lifeless” the restoration
tends to become.
After initial reduction, a size zero