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Title: Stefan Ursu C.D.T.


1
SHADE MATCHING FOR Aesthetic SUCCESS
  • Stefan Ursu C.D.T.

2
Shade 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

3
History 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

4
Theory of Color
5
Sir Issac Newton
6
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7
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8
  • -THE INTERACTION OF LIGHT WITH AN
  • OBJECT MAKES COLOR PERCEPTION
  • POSSIBLE -

9
The Physics of Light
10
The Physics of Light
  • Emission - The source of light. Produced by
    physical or chemical processes.

11
The Physics of Light
  • Transmission - Process by which light passes
    through a translucent or transparent object.

12
The Physics of Light
  • Reflection - occurs when light strikes a solid
    object and bounces off of it.

13
The Physics of Light
Absorption - Process by which light is absorbed
by the object.
14
The Physics of Light
Perception - Occurs in the brain. Rods perceive
brightness and and cones perceive the hue (color).
15
The Physics of Light
16
The Physics of Light
The perceived color of an object is the
determined by the molecular density and makeup of
that object
17
Color in Dentistry
18
Primary and Secondary Colors
19
Complementary Colors
20
Complementary colors neutralize each other and
form grey
21
Prof. Albert D. Munsell
22
Munsells Color Chart
23
Munsells 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
24
Variables Affecting Color(perception)
25
ILLUMINATION
26
Light Intensity...
27
Light Quality...
Incandescent - 2856 K
Fluorescent - 4000 K
Color Corrected - 5500 K
28
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29
FACTORS AFFECTING ILLUMINATION
  • Metamerism
  • Lighting Conflicts

30
Metamerism
- Phenomenon in which the same object will look
differently under different lighting conditions.
31
Lighting Conflicts
- mixing of light sources
32
CONTRAST EFFECTS
33
Value Contrast
34
Value Contrast
35
Hue Contrast
36
Hue Contrast
37
Chroma Contrast
38
Chroma Contrast
39
Areal Contrast
40
Areal Contrast
41
Spacial Contrast
42
Spacial Contrast
43
Successive Contrast
44
Successive Contrast
45
VIEWER ASSOCIATED EFFECTS
46
VIEWER-ASSOCIATED EFFECTS
  1. Color Blindness
  2. Age
  3. Fatigue
  4. Nutrition
  5. Emotions
  6. Binocular differences
  7. Medication

47
Effects of Chemicals on Color Perception
Drug Effect on R/O/Y Effect on B/G/P
Alcohol/Morphine Lighter Darker
Caffeine Darker Lighter
48
Shade MatchingArmamentarium
49
Conventional
Technology-Based
50
Vita Classical and 3-D Master Shade Guides
51
Vita Easy-Shade System
52
Digital SLR Camera
Canon
Nikon
53
Macro/Micro Lens
Sigma EX Macro 105mmF2.8
Nikon Micro 105mm F2.8 VR
Canon 100mm Macro EF
54
7-Step Shade Matching Procedure
55
1. Patient Evaluation
56
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?
57
2. Analysis
58
2. Analysis
A1
B1
B1
D2
59
2. Analysis
60
2. Analysis
61
3. Communication
62
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

63
Reference Shots
64
4. Interpretation
65
4. Interpretation
  • Shade tab information is interpreted and
    converted into the nomenclature of the ceramic
    system used

66
4. Interpretation
  • A shade map is created using the ceramic system
    language

67
5. Fabrication
68
5. Fabrication
  • Restoration is fabricated using the materials
    that would best match the surrounding dentition

69
6. Verification
70
6. Verification
  • Restoration is checked for accuracy with
    Easy-Shade System AND with conventional shade
    tabs.

71
7. Insertion/Placement
72
7. Insertion/Placement
  • The final test for a color match.

73
Suggested Reading
74
Suggested Reading
75
SHADE MATCHING
  • History of shade
  • Brief theory of color
  • Variables affecting color
  • Conventional and technology-based shade matching
  • Shade Matching Procedure
  • Clinical Cases

76
THANK YOU...
77
Stefan Ursu CDT Aesthetic DesignStudio info_at_Aesthe
ticDesignStudios.com
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