Product Description
Accurate shade matching is one of the most
challenging aspects of dental restorations and
cosmetic dentistry.1 Because of the great variety
of natural tooth color, achieving a close shade
match of an artificial restoration with natural dentition
is a complex process. Practitioners require an
understanding of color, light, and related characteristics
of porcelain, as well as the ability to clearly communicate
instructions with laboratory technicians.1
Successful shade matching integrates a number
of critical factors—including an individual’s perception
of color, the light source in which shade is
being determined (the practitioner’s office), the
color of surrounding walls and cabinets, and the
colors of patients’ clothing and makeup.1,2
Practitioners must also take steps to reduce the
problem of metamerism—a phenomenon in which
the color of 2 objects looks identical in one light
source but different under other light conditions
(eg, in sunlight versus fluorescent light).1
Unique Color Classification System
VITA’s goal in the creation of the VITA 3DMaster
Shade Guide 10 years ago was precision
shade matching. The VITA 3D-Master Shade Guide
is based on a color classification principle in which
3 dimensions of color—value (brightness),
chroma (intensity of the color),
and hue (the color itself)—are considered
equally so that the determination
of shade can be easily carried out using
systematic, consistent criteria. The
VITA 3D-Master Shade Guide’s ability
to independently measure value, chroma,
and hue has made this system
increasingly popular.3
The 3D-Master Shade Guide
improves on VITA’s revolutionary
Classical Shade Guide, which became an
international standard for natural tooth
shades. As VITA notes, however, the
Classical Shade Guide and other traditional
shade determination systems leave
voids in the coverage of tooth color or
have heavy concentrations of several colors,
making proper shade determination
more difficult and the creation of intermediate
shades too subjective.
Addressing the Important Elements
The VITA 3D-Master Shade Guide
addresses the most important elements
of tooth shade measurements: a systematic
arrangement of shades within the
natural tooth color space and an objective,
numerical measure of color that
can be written as a clear prescription
for the laboratory technicians. The
VITA 3D-Master Shade Guide provides
consistent, even distribution of shades
within the tooth color area, providing
coverage of the range of natural tooth
color, as well as simplifying the determination
of intermediate shades.
A Simple, Three-Step Process
The VITA 3D-Master Shade Guide
requires just 3 simple steps to determine
a patient’s shade. (Practitioners are
reminded to take these steps under
proper conditions of timing and light.)
- Determine the value by selecting the
closest match from 1 of 5 value groups.
- Determine the chroma within the
value group from 3 choices.
- Finally, select the hue by determining
whether the natural tooth has a more
yellow or red cast than the shade
sample selected.
The VITA 3D-Master Shade Guide
also allows for an alternative method of
determining value in Step 1, as well as
for the exceptional situation in which a
shade falls between two 3D-Master
shades. Unlike other shade systems,
there is only 1 discernable intermediate
shade between any 2 adjacent shade
tabs. Intermediate and bleached shades
are easily reproduced.
Range of Shades, Compatibility
The VITA 3D-Master Shade Guide
offers an extended range of 29 shades
(including 3 bleaching shades) and 52
easily reproduced intermediate shades,
thus providing a broader shade range
than other guides. The shade guide is
compatible with the following porcelain
systems: VMK95, Omega 900, VM 7 allceramic,
VM 9 all-ceramic, VM 13 PFM,
and Titanium porcelain. The 3D-Master
Shade Guide is also compatible with
Zeta indirect composites, 3D-Direct
micro-hybrid direct composite, and
Vitapan and Physiodens denture teeth.
The VITA 3D-Master system of
materials include biocompatible, esthetic
materials that are designed to suit
every indication, including aluminaveneering
porcelain, zirconia-veneering
porcelain, alloy-veneering porcelain,
microhybrid direct composite, and die
preparation material.
Important New Addition
Vident has introduced the portable,
lightweight VITA Easyshade digital
shade-taking device to measure accurate
shades regardless of differences in
color perception. The Easyshade uses
multiple color spectrophotometers at
varying angles to instantly measure a
precise shade and prescribe the best
shade under any lighting condition.
—Jackie Syrop
References
- 1 - Fondriest J. Shade matching in restorative dentistry:
the science and strategies. Int J
Periodontics Restorative Dent. 2003;23:2-15.
- 2- Al-Wahadni A, Ajlouni R, Al-Omari O, et al.
Shade-match perception of porcelain-fused-tometal
restorations: a comparison between dentist
and patient. J Am Dent Assoc. 2002;133:
1220-25.
- 3- Mrazek B. Brought to you in living color!
Zahn Sales Flyer. July-August 2007.
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