12
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CERECDOCTORS.COM
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QUARTER 2
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2015
VIRTUAL DESIGN
The virtual 3-D model was imported and trimmed in the CEREC
4.2 software (Fig. 3). The preparation margin was then defined
on tooth #9 (21) (Fig. 4). In order to transfer the shape of tooth
#8 (11) as desired onto the tooth to be restored, the copy line was
drawn and Biogeneric Reference Design Mode was used (Fig. 5).
Based on the collected data, the software automatically generated
a suggested design (Figs. 6 and 7). This was modified slightly at
the margins before completing virtual positioning in the selected
block (size EM-14 measuring 12 x 14 x 18 mm) (Fig. 8).
FABRICATION
The VITA Enamic veneer was then milled at normal speed using
the CEREC MC XL Premium milling unit. According to the
information provided by the manufacturer, VITA Enamic also
supports fast milling mode. Due to its special structure comprised
of a ceramic and polymer network, machining the material results
in less milling tool wear than in the case of other CAD/CAM
ceramics. Other benefits include that the material can be milled
more thinly, particularly in edge areas, without any fractures at the
margins. This reduces the workload during finishing.
FINISHING AND PLACEMENT
Removal of the sprue was then followed by try-in of the veneer in
the patient’s mouth (Fig. 9). To create a surface texture, the VITA
Enamic clinical polishing set was used. In order to replicate the
adjacent tooth, only the incisal edge and the surface were made
a little less even. High-gloss polishing then followed. Glazing can
be performed using light-curing stains. Unlike other ceramics, a
firing is not required at all with VITA Enamic.
Thanks to the natural shade effect of the hybrid ceramic veneer,
the patient was immediately delighted. Figure 10 shows the result.
The natural translucence along the incisal edge was possible
because the material can be milled to create a very thin layer. The
wall thickness in the marginal area can be reduced to 0.2 mm.
Before final cementation was carried out, the shade effect was
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S TA M N I T Z
Fig. 9: Try-in in the patient’s mouth
Fig. 10: Final result with natural shade effect in the patient’s mouth
evaluated using try-in pastes from the Variolink Veneer cementa-
tion system. Placement was then carried out in a relatively dry
environment using Variolink Veneer in the shade HV+1.
FOR DAILY USE
VITA Enamic has proven itself to be an innovative material in our
practice. It is often used instead of silicate and oxide ceramics. This
is due on the one hand to the effective processing that it supports.
However, the hybrid material can also be milled to a very thin
layer. This allows us to carry out preparation in a manner that is
gentle on tooth substance and thus remains true to our philosophy
of retaining as much healthy tooth substance as possible. Many
patients also report that the restoration feels comfortable in their
mouths, in a similar way to natural dentition.
For questions or more information, Dr. Stamnitz can be reached at
.
“The material can be milled more thinly,
particularly in edge areas, without any
fractures at the margins. This reduces
the workload during finishing.”
