Color Flashcards
What is the Esthetic Triad?
Shape, Texture, Color
Pigment, Color Tone (red, blue, yellow)
Hue
Intensity or degree of saturation and purity of a color tone (hue)
Chroma
The degree of color brightness
Value
Is more value mean that it is lighter or darker?
lighter
The ability to absorb radiant energy and emit it in the form of a different wavelength
Fluorescence
The ability of a translucent material to appear blue in reflected light and red-orange in transmitted light
Opalescence
The degree to which light is transmitted rather than absorbed or reflected
Translucency
What do rods perceive?
the brightness of the color, the intensity of the light rays
What do cones perceive?
the hue (color)
Where is the color of teeth derived from?
dentin
Enamel modifies the dentinal body color, … the brightness (value) and acts as a selective light filter
increasing
What color is dentin generally?
reddish yellow
What does dentin posses that makes it fluorescent; light is reflected back with more energy than the original?
phytochrome and fluorophore
When does Dentin have the higher chromaticity?
when older; slow increase in orange-red color
Dentin is thicker due to what?
contraction of the pulp and it is replaced by secondary dentin
What does the affect of dentin aging have on opacity?
dentin becomes more mineralized and looses opacity (more transparent)
Enamel is responsible for regulating the …
Value, tooth brightness (has a high value)
Enamel is characterized by a high degree of ….
translucency and unique light effects
When using composite resin you should make the enamel layer thinning than natural enamel due to?
thicker composite lowering the value
Blue or gray transparent effects found in the incisal 3rd and/or inter-proximal enamel (dentin-free area); Special Optical properties of transparence and iridescence
Opalescences
The border between enamel and dentin, a highly fluorescent organic layer. Created after the dentinal body and before the final enamel layer.
Intermediate (mid) layer DEJ
What 3 properties can be seen in the mid layer?
- Intensives
- Opalescences
- Characterizations
Spots frequently found in natural enamel. They appear as white blurred stains of different types, that is, defined as points, clouds, or bands.
Intensives
Existing color characteristics present in teeth, such as white or amber bands, enamel cracks, colored mammelons, and stains
Characterizations
What elements affect color?
- Illumination
- Contrast Effects
- Viewer Associated Effects
When 2 objects appearing to match in color under 1 condition show differences under another condition
Metamerism
Poor lighting creates defects in … perception, crucial in dental color matching.
red-yellow
How should the light be for color matching?
soft, diffuse, and white
Visual phenomena that create optical illusions difficult to decipher
contrast effects
Use a background with a … chroma relative to the shade of the tooth so color is more intense and easier to distinguish.
lower
Larger teeth appear …, … teeth appear larger
lighter
When one color is viewed immediately after another an afterimage often will appear.
Successive - Contrast effect
When is maximum enamel dehydration?
30-45 mins
Which tooth has the highest chroma of the dominate hue?
canine
