Title: Stefan Ursu C.D.T.
1SHADE MATCHING FOR Aesthetic SUCCESS
2Shade 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
3History of color in dentistry
- 1930s - Dr. Bruce Clark
- 1960s 70s - Dr. R. Sproull, Dr. J.
Preston, Dr. S. Bergen. (SCAD) - 1970s-1980s Dr. John McLean, Mr. Willi Geller
- 1990s - Present Dr. Stephen Chu, Dr. Galip
Gurel, Dr. Pascal Magne, Mr. Michel Magne
4Theory of Color
5Sir Issac Newton
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8- -THE INTERACTION OF LIGHT WITH AN
- OBJECT MAKES COLOR PERCEPTION
- POSSIBLE -
9The Physics of Light
10The Physics of Light
- Emission - The source of light. Produced by
physical or chemical processes.
11The Physics of Light
- Transmission - Process by which light passes
through a translucent or transparent object.
12The Physics of Light
- Reflection - occurs when light strikes a solid
object and bounces off of it.
13The Physics of Light
Absorption - Process by which light is absorbed
by the object.
14The Physics of Light
Perception - Occurs in the brain. Rods perceive
brightness and and cones perceive the hue (color).
15The Physics of Light
16The Physics of Light
The perceived color of an object is the
determined by the molecular density and makeup of
that object
17Color in Dentistry
18Primary and Secondary Colors
19Complementary Colors
20Complementary colors neutralize each other and
form grey
21Prof. Albert D. Munsell
22Munsells Color Chart
23Munsells 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
24Variables Affecting Color(perception)
25ILLUMINATION
26Light Intensity...
27Light Quality...
Incandescent - 2856 K
Fluorescent - 4000 K
Color Corrected - 5500 K
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29FACTORS AFFECTING ILLUMINATION
- Metamerism
- Lighting Conflicts
30Metamerism
- Phenomenon in which the same object will look
differently under different lighting conditions.
31Lighting Conflicts
- mixing of light sources
32CONTRAST EFFECTS
33Value Contrast
34Value Contrast
35Hue Contrast
36Hue Contrast
37Chroma Contrast
38Chroma Contrast
39Areal Contrast
40Areal Contrast
41Spacial Contrast
42Spacial Contrast
43Successive Contrast
44Successive Contrast
45VIEWER ASSOCIATED EFFECTS
46VIEWER-ASSOCIATED EFFECTS
- Color Blindness
- Age
- Fatigue
- Nutrition
- Emotions
- Binocular differences
- Medication
47Effects of Chemicals on Color Perception
Drug Effect on R/O/Y Effect on B/G/P
Alcohol/Morphine Lighter Darker
Caffeine Darker Lighter
48Shade MatchingArmamentarium
49Conventional
Technology-Based
50Vita Classical and 3-D Master Shade Guides
51Vita Easy-Shade System
52Digital SLR Camera
Canon
Nikon
53Macro/Micro Lens
Sigma EX Macro 105mmF2.8
Nikon Micro 105mm F2.8 VR
Canon 100mm Macro EF
547-Step Shade Matching Procedure
551. Patient Evaluation
561. 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?
572. Analysis
582. Analysis
A1
B1
B1
D2
592. Analysis
602. Analysis
613. Communication
623. 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
63Reference Shots
644. Interpretation
654. Interpretation
- Shade tab information is interpreted and
converted into the nomenclature of the ceramic
system used
664. Interpretation
- A shade map is created using the ceramic system
language
675. Fabrication
685. Fabrication
- Restoration is fabricated using the materials
that would best match the surrounding dentition
696. Verification
706. Verification
- Restoration is checked for accuracy with
Easy-Shade System AND with conventional shade
tabs.
717. Insertion/Placement
727. Insertion/Placement
- The final test for a color match.
73Suggested Reading
74Suggested Reading
75SHADE MATCHING
- History of shade
- Brief theory of color
- Variables affecting color
- Conventional and technology-based shade matching
- Shade Matching Procedure
- Clinical Cases
76THANK YOU...
77Stefan Ursu CDT Aesthetic DesignStudio info_at_Aesthe
ticDesignStudios.com