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FP > 2- Color > Flashcards

2- Color Flashcards

1
Q

A phenomenon of light or visual perception that enables one to differentiate otherwise identical objects

A

Color

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2
Q

color is a visual response to light consisting of the three dimensions of __

A

hue
value
chroma

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3
Q

3 variables to color

A

Receptor (eye)
Object
Light source

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4
Q

Munsell color space
1940’s revised Munsell system by:

A

International Commission of Illumination (CIE)
American Society for testing and materials

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5
Q

Is an internationally accepted standard of art, science and industry

A

Munsell color space

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6
Q

band of colors produced when sunlight is passed through a prism

A

Spectrum

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7
Q

Primary additive colors

A

Blue
Red
Green

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8
Q

Secondary Additive Colors

A

Cyan
Magenta
Yellow

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9
Q

If the three primary colors are combined with equal intensities, __ is created

A

white light

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10
Q

Look at the spectral reflection of different wavelengths

A

PIC in slides

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11
Q

A number from 1 to 100 given to a light source to indicate it relative equivalence to pure white light, which has a color rendering index of 100. The closer the number is to 100, the more it resembles pure white light

A

Color rendering index

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12
Q

A light source with at least __ CRI is recommended for an accurate shade selection

A

93.42

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13
Q

Basic color
distinguish one family of color from another- as red, green, blue

A

Hue

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14
Q

What possesses no hue

A

Black, white and grays

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15
Q

The color itself

A

Hue

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16
Q

Stains can be used to change the __ of porcelain color

A

Hue

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17
Q

The purity of a color
intensity
saturation

A

Chroma

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18
Q

The intensity of a color

A

Chroma

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19
Q

High __ = highly saturated
Low __ = weak

A

Chroma

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20
Q

Distinguished from a dark color
Blackness or whiteness

A

Value

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21
Q

THe brightness of a color

22
Q

High value =
Low value =

A

Brighter
Darker

23
Q

__ is the most important color variable in dental shade selection

A

Brightness

24
Q

__ is the most important aspect in shade selection

25
Q

If a complementary color issued to modify a color, its __ will decrease

26
Q

Color perception
Color may appear different if:

A

light source
size and contours
background color and lightening
perception angle

27
Q

Receptors in the human eye

A

Rods and cones

28
Q

Convey shades of gray (value)

A

Rods (human eye)

29
Q

Allow brain to perceive hue and chroma

A

Cones (Human eye)

30
Q

Everything we see is __ light

A

reflected
(Color wont be able to see if light cannot be reflected)

31
Q

Full spectrum is required to see __

A

real color

32
Q

Recommended illumination for accurate shade selection in dentistry

A

5500 degrees K
CRI about 93.42
Working distance 12-15 inches (arms length)
Appropriate environment (neutral color operatory)

33
Q

A phenomenon where teeth appear to be the same color under one type of light, but they appear different under another light source

A

Metamerism

34
Q

Multiple __ is recommended for shade selection, this way an ideal CRI is obtained (sunlight should be one of them)

A

light sources

35
Q

Staining of the porcelain will increase __

A

metameric responses

36
Q

Illumination aid

A

Rite lite 2 (look at slide)
Vita Easyshade Advance (look at slide)

37
Q

the light effect of a translucent material appearing blue in reflected light and red-orange in transmitted light

A

Opalescence

38
Q

The optical property by which a material reflects ultraviolet radiation

A

Fluorescence

39
Q

the property of a material that absorbs and or reflects all light and prevents any transmission of light

40
Q

Having the appearance between complete opacity and complete transparency; partially opaque

A

Translucency

41
Q

What are the 4 shade guides

A

Vita classical
Vita 3D Master
Chromascop
Natural Die Material
(LOOK AT SLIDE)

42
Q

Shade guide to identify the shade of the perp supporting the future restoration

A

Stump shade guide

43
Q

essential when working with translucid materials

A

Stump shade guide

44
Q

Lab technicians are able to modify restorations shade to mask the underlying preps shade
ALWAYS use this guide when working on esthetic cases

A

Stump shade guide

45
Q

Steps on how to select shade for vita classical

A
  1. select hue (70% will be A)
  2. select chroma
  3. verify value
46
Q

Steps on how to select shade for vita 3D-Master

A
  1. Select value
  2. Select chroma
  3. Select Hue
47
Q

Key points for shade selection

A

Look at slide

48
Q

Record shade by dividing the facial/ buccal surface in __

A

thirds
(look at slide)

49
Q

Photographs

A

Look at slide

50
Q

Cements as shade modifiers

A

Look at slide

51
Q

Whitening and shade selection

A

Look at slide

FP (10 decks)

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