Robert Zubák Using CaptekTM products and Ivoclar ... - JDT Unbound

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Figure 9
and ceramic material. Also, it ensures better refraction of light whereby
the light penetrates through the dentin and incisal substances to the
opaque surface. The addition of the margin powder does not change
color.
Achieving a desired color shade is not easy and a certain amount of
experience is needed before an appropriate color is created following the
opaque firing. Most teeth feature a darker color shade toward the cervical
and gradually become lighter closer to the incisal with varying degrees of
transparency.
When selecting an appropriate color shade the two principal horizontal
lines, which divide the tooth into the cervical, dentin and incisal,
should be determined. Close attention should be paid to the selection
of an appropriate dentin color shade because it determines the other
shades.
In this case, the A3 color shade was selected for the dentin. The
cervical has a somewhat darker shade, so a darker color was used for this
area. In this case, the cervical incisal orange (CI.o) was added in a 60-40
ratio to the deep dentin A3 color shade.
The A shades consist of a palette of colors that are close in shade to
each other, differing only in their chroma intensity. Using the dentin that
was made darker by adding CI.o as a basis for the cervical color, you can
achieve a more natural and animated look.
I prepared pure A3 deep dentin, pure A3 dentin, A3 dentin with
transparent neutral in a 50-50 ratio, pure TS2 incisal substance, a mix of
TS2 and TN 50/50, transparent blue TB, mamelon light substance mix
of MML and A3 50/50, pure effect E3, and pure occlusal dentin orange
(OD.o).
Figure 9 shows the deep dentin used for the cervical and the deep
dentin A3+ cervical incisal orange (CI.o) proximal areas. A3 was applied
around the entire upper rim deep dentin. This method hides the rim of
the coping by preventing light from passing through the more transparent
material to be added. This could be a problem if the preparation is
inappropriately reduced and develops a hot spot.
I applied a mix of A3 dentin+ transparent neutral (TN) in a 50-50
ratio in the cervical area. Close attention is required to address insufficient
space in the cervical area. This mixture creates the effect of greater
depth, which is important in this area. Further layers consist of A3 dentin
in the dentin area and a mixture of dentin A3 with a transparent neutral
(A3+TN) in the incisal area (Figures 10 and 11).
I provided some space for applying transparent substance and
mamelons and applied occlusal dentin orange (OD.o) on the occlusal
surface. The edges were overlaid with a thin layer of TS2 incisal, onto
which the mamelons were created using the MML mixture. A3 dentin
and TB transparent blue were applied between these (Figure 12). A thin
layer of TS2 incisal between dentin and the entire incisal provides for an
appropriate separation of dentin and incisal powders, thus the final shade
takes on a more life-like appearance. The deep A3 dentin was applied
onto the OD.o (occlusal dentin orange) already on the occlusal surface,
which starts the initial shape of the cusps (Figure 13). The incisal mix
was then used to cover the entire surface. In the dentin area, mixes of TS2
and TS2+TN were used (Figures 14 and 15). The occlusal anatomical
features were formed using this substance as well.
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January 2004 ● JOURNAL OF DENTAL TECHNOLOGY 27