GC EUROPE G-aenial - Manual (Page 14)

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G-ænial Anterior & Posterior Technical Manual
5.3 Shade taking
it is advised to always select composite shade(s) after cleaning the tooth and before tooth
preparation. it is also important to select the shade(s) prior to rubber dam placement, since
desiccated teeth are lighter in value and if used for shade matching could result in the wrong shade
being selected.
Single-shade layering technique
Worldwide, the VitaPan classical shade guide is the guide dentists use when selecting shades.
consequently, our composite shades are mostly in line with this shade guide. For shade matching
with G-ænial, reference should be made to the Body section part of the tabs of this guide.
alternatively, the G-ænial shade guide can be used to select the appropriate Standard Shade for
the clinical situation.
Multi-shade layering technique
in some cases, e.g., larger-sized cavities or cases with high aesthetic
demands, more shades may be required with different translucencies and
values. these can be selected from the G-ænial Special Shades.
Outside Shades: these should be used to replace the enamel layer
(part 3 of Figure 22)
Standard Shades: these should be used to replace most of the lost dental
structure (mainly dentin) (part 2 of Figure 22).
insides Shades: these should be used to bring opacity to the part of the
restoration replacing dentin (part 1 of Figure 22).
Step1: Taking the value
the value is the most underestimated parameter in shade selection. in most cases, only hue and
chroma data are determined in order to obtain information on the required composite “shade”.
From the images below, it can be seen that a lack of value results in a less life- like image.
Figure 23: influence of value on colour perception
the incisal/approximal areas of the teeth are good sites to determine the value. the three main
G-ænial shades which will help in reproducing these values are the age-related shades: Je (Junior
enamel), ae (adult enamel) and Se (senior enamel). alternatively, the classical Vita shade guide can
be re-organised according to value, as shown in Figure 24.
Figure 22 cross-section of
an incisor showing the
dental structures
Full colours - combination
of hue, chroma and value
Black and white - only
values are seen
“Full colours”
but with less value