SHADE MATCHING
FOR Aesthetic SUCCESS
Stefan Ursu C.D.T.
•History of Color in Dentistry
Shade
Matching
•Theory of color
•Variables affecting color
•Conventional and technology-based shade
matching
•Shade Matching Procedure
•Clinical Cases
History of color in dentistry
• 1930’s - Dr. Bruce Clark
• 1960’s & 70’s - Dr. R. Sproull, Dr. J. Preston,
Dr. S. Bergen. (SCAD)
• 1970’s-1980’s Dr. John McLean, Mr. Willi
Geller
• 1990’s - Present Dr. Stephen Chu, Dr. Galip
Theory of Color
Sir Issac Newton
•
-THE INTERACTION OF LIGHT WITH AN
•
OBJECT MAKES COLOR PERCEPTION
•
POSSIBLE -
The Physics of Light
The Physics of Light
•
Emission - The source of
light. Produced by physical or
chemical processes.
The Physics of Light
•
Transmission - Process by
which light passes through a
translucent or transparent object.
The Physics of Light
•
Reflection - occurs when light
strikes a solid object and
bounces off of it.
The Physics of Light
Absorption - Process by which light is
absorbed by the object.
The Physics of Light
Perception - Occurs in the brain.
Rods perceive brightness and and
cones perceive the hue (color).
The Physics of Light
The Physics of Light
The perceived color of an object
is the determined by the
molecular density and makeup
of that object
Color in Dentistry
Primary and Secondary Colors
Complementary Colors
Complementar
y colors
neutralize each
other and form
grey
Prof. Albert D. Munsell
Munsell’s Color Chart
Munsell’s Color Chart
Hue - Color tone, the actual color
Chroma - Saturation, purity of color
Value - Relative lightness/darkness
of the color
Translucency - The degree to
which light is transmitted rather than
absorbed or reflected in a given
restoration
Variables Affecting
Color(perception)
ILLUMINATION
Light Intensity...
Light Quality...
Incandescent - 2856 K
Fluorescent - 4000 K
Color Corrected - 5500 K
FACTORS AFFECTING ILLUMINATION
•Metamerism
•Lighting Conflicts
Metamerism
- Phenomenon in which the same
object will look differently under
different lighting conditions.
Lighting Conflicts
- mixing of light sources
CONTRAST EFFECTS
Value Contrast
Value Contrast
Hue Contrast
Hue Contrast
Chroma Contrast
Chroma Contrast
Areal Contrast
Areal Contrast
Spacial Contrast
Spacial Contrast
Successive Contrast
Successive Contrast
VIEWER ASSOCIATED
EFFECTS
VIEWER-ASSOCIATED EFFECTS
1. Color Blindness
2. Age
3. Fatigue
4. Nutrition
5. Emotions
6. Binocular differences
7. Medication
Effects of Chemicals on Color Perception
Drug
Effect on R/O/Y Effect on B/G/P
Alcohol/Morphi
ne
Lighter
Darker
Caffeine
Darker
Lighter
Shade Matching
Armamentarium
Conventional
Technology-Based
Vita Classical and 3-D Master
Shade Guides
Vita Easy-Shade System
Digital SLR Camera
Nikon
Canon
Macro/Micro Lens
Sigma EX Macro
105mmF2.8
Canon 100mm Macro EF
Nikon Micro
105mm F2.8 VR
7-Step Shade Matching
Procedure
1. Patient Evaluation
1. Patient Evaluation
- Are there any contrast effects present?
- How will shade selection of one restoration
affect overall smile?
- How will adjacent and opposing dentition
affect shade matching?
- Polycromatism/High translucency/high
opacity?
2. Analysis
2. Analysis
A1
B1
B1
D2
2. Analysis
2. Analysis
3. Communication
3. Communication
• Reference photographs of shade system suggested
shades including full smile photos and photos of
surrounding dentition
• Shots from different angles and lighting conditions
• Use of 18% gray card to eliminate color distractions
• Electronic transfer of tech-based shade systems and
photos
Reference Shots
4. Interpretation
4. Interpretation
• Shade tab information is
interpreted and converted into
the nomenclature of the ceramic
system used
4. Interpretation
•A shade map is
created using the
ceramic system
language
5. Fabrication
5. Fabrication
• Restoration is
fabricated using the
materials that would
best match the
surrounding dentition
6. Verification
6. Verification
• Restoration is
checked for accuracy
with Easy-Shade
System AND with
conventional shade
tabs.
7. Insertion/Placement
7. Insertion/Placement
•The final test for
a color match.
Suggested Reading
Suggested Reading
SHADE MATCHING
• History of shade
• Brief theory of color
• Variables affecting color
• Conventional and technology-based shade matchin
• Shade Matching Procedure
• Clinical Cases
THANK YOU...
Stefan Ursu CDT
Aesthetic DesignStudio
info@AestheticDesignStudios.com