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QUARTER 2 | 2014 | CERECDOCTORS.COM | 43
PRODUCT INFORMATION
According to the manufacturer, VITA
ENAMIC is the first hybrid dental
ceramic in the world to offer a dual-
network structure: a dominant ceramic
network is reinforced by a polymer
network, with both networks fully inte-
grated with one another. The range of
indications includes all conventional
single-tooth restorations, from inlays
and onlays, to veneers and full and
partial crowns. The special material
properties are beneficial particularly
for restorations subject to high occlusal
load, including those in the molar
region, as well as for minimally-invasive
restorations. VITA ENAMIC is available
in two levels of translucency, HT (highly
translucent) and T (translucent), as well
as in the five VITA System 3-D Master
shades 0M1, 1M1, 1M2, 2M2 and 3M2.
The product is available in packs of
five sizes: EM-14 (12 x 14 x 18 mm) and
EM-10 (8 x 10 x 15 mm). The blocks can
be processed using the CEREC / inLab
MC XL system from Sirona Dental with
software versions > V4.0.
So that the blocks can also be
milled with the small CEREC /
inLab milling system, and using
software versions earlier than
4.0, VITABLOCSMark II, I14must
be selected in the list of materials.
CAD/CAM FABRICATION
In the practice, conventional impres-
sions were taken of the initial situa-
tion without preparation (Fig. 3), and
gypsum models were fabricated in the
laboratory. These were digitized using
the extra-oral scanner in Eos Blue from
Sirona Dental. The latest inLab soft-
ware (V4.2) was provided for virtual
modeling; custom veneer restorations
were created using Biogeneric mode
(Fig. 4). The model axis was adjusted
first (Fig. 5) following scanning and
a preparation margin, then manually
added for tooth #7 (#12) and #10 (#22)
(Fig. 6-7). The following parameters
werepre-definedorthedesignsuggested
by the software: spacer of 20 microns,
veneer thickness
of 300 microns,
occlusal milling
offset of zero, no
reinforcement at the
margins, nomilling tool
radius correction, but with
automatic removal of undercuts
(Fig. 8). It was then possible to finalize
the veneer models as usual by hand
using free-forming tools (Fig. 9). Figure
10 shows the milling preview of one of
the fully modeled partial veneers.
Using the inLab MC XL milling unit,
the partial veneers were fabricated
from VITA ENAMIC blocks in shade
2M2 (in accordance with prior shade
determination) and HT translucency
(Figs. 11-13). In this case, the T variant
of the material would not have offered
sufficient translucency as, in our expe-
rience, it is generally too opaque for
reconstructions in the incisal area. We
use the T blocks primarily for the fabri-
cation of custom implant abutments
with adhesive bases.
Fig. 4: Creating the task
Fig. 5: Aligning the model
Fig. 6: Jaw situation without
preparation
Fig. 7: Addition of
preparation margins
Fig. 8: Definition of the
modeling parameters
Fig. 9: Processing of the
veneer models
Fig. 10: Milling preview
of the partial veneer for
region 22 (#10) 4 5
6 7 8
10
9