SHADE MATCHING FOR Aesthetic SUCCESS
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Transcript of SHADE MATCHING FOR Aesthetic SUCCESS
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Stefan Ursu C.D.T.Stefan Ursu C.D.T.
SHADE MATCHING FOR Aesthetic SUCCESSSHADE MATCHING FOR Aesthetic SUCCESS
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Shade MatchingShade Matching•History of Color in Dentistry
•Theory of color
•Variables affecting color
•Conventional and technology-based shade matching
•Shade Matching Procedure
•Clinical Cases
•Clinical Cases
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• 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 Gurel, Dr. Pascal Magne, Mr. Michel
Magne
History of color in dentistry
History of color in dentistry
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Theory of ColorTheory of Color
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Sir Issac NewtonSir Issac Newton
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• -THE INTERACTION OF LIGHT WITH AN
• OBJECT MAKES COLOR PERCEPTION
• POSSIBLE -
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The Physics of Light
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•Emission - The source of light. Produced by physical or chemical processes.
The Physics of Light
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•Transmission - Process by which light passes through a translucent or transparent object.
The Physics of Light
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•Reflection - occurs when light strikes a solid object and bounces off of it.
The Physics of Light
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Absorption - Process by which light is absorbed by the object.
The Physics of Light
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Perception - Occurs in the brain. Rods perceive brightness and and cones perceive the hue
(color).
The Physics of Light
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The Physics of Light
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The perceived color of an object is the determined by the molecular density and
makeup of that object
The Physics of Light
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Color in DentistryColor in Dentistry
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Primary and Secondary Colors
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Complementary Colors
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Complementary colorsneutralize each other and form
grey
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Prof. Albert D. Munsell
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Munsell’s Color Chart
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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
Munsell’s Color Chart
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Variables Affecting Color(perception)
Variables Affecting Color(perception)
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ILLUMINATION
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Light Intensity...
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Light Quality...
Incandescent - 2856 K
Fluorescent - 4000 K
Color Corrected - 5500 K
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FACTORS AFFECTING ILLUMINATION
•Metamerism
•Lighting
Conflicts
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Metamerism- Phenomenon in which the
same object will look differently under different
lighting conditions.
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Lighting Conflicts
- mixing of light sources
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CONTRAST EFFECTS
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Value Contrast
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Value Contrast
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Hue Contrast
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Hue Contrast
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Chroma Contrast
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Chroma Contrast
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Areal Contrast
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Areal Contrast
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Spacial Contrast
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Spacial Contrast
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Successive Contrast
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Successive Contrast
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VIEWER ASSOCIATEDEFFECTS
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VIEWER-ASSOCIATED EFFECTS
1. Color Blindness
2. Age
3. Fatigue
4. Nutrition
5. Emotions
6. Binocular differences
7. Medication
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DrugEffect on
R/O/YEffect on
B/G/P
Alcohol/Morphine
Lighter Darker
Caffeine Darker Lighter
Effects of Chemicals on Color Perception
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Shade MatchingArmamentariumShade MatchingArmamentarium
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Conventional
Technology-Based
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Vita Classical and 3-D MasterShade Guides
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Vita Easy-Shade System
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Digital SLR Camera
CanonNikon
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Nikon Micro 105mm F2.8 VR
Sigma EX Macro 105mmF2.8
Canon 100mm Macro EF
Macro/Micro Lens
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7-Step Shade Matching Procedure
7-Step Shade Matching Procedure
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1. Patient Evaluation
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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?
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2. Analysis
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A1
B1
D2
2. Analysis
B1
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2. Analysis
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2. Analysis
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3. Communication
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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
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Reference Shots
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4. Interpretation
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4. Interpretation
• Shade tab information is interpreted and converted into the nomenclature of the ceramic system used
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•A shade map is created using the ceramic system
language
4. Interpretation
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5. Fabrication
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5. Fabrication
• Restoration is fabricated using the materials that would best match the surrounding dentition
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6. Verification
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6. Verification
• Restoration is checked for accuracy with Easy-Shade System AND with conventional shade tabs.
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7. Insertion/Placement
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•The final test for a color
match.
7. Insertion/Placement
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Suggested ReadingSuggested Reading
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Suggested ReadingSuggested Reading
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SHADE MATCHINGSHADE MATCHING
•History of shade
•Brief theory of color
•Variables affecting color
•Conventional and technology-based shade matching
•Shade Matching Procedure
•Clinical Cases
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THANK YOU...THANK YOU...
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