2- Color

Question 1

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

Answer 1

Color

Question 2

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

Answer 2

hue
value
chroma

Question 3

3 variables to color

Answer 3

Receptor (eye)
Object
Light source

Question 4

Munsell color space
1940’s revised Munsell system by:

Answer 4

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

Question 5

Is an internationally accepted standard of art, science and industry

Answer 5

Munsell color space

Question 6

band of colors produced when sunlight is passed through a prism

Answer 6

Spectrum

Question 7

Primary additive colors

Answer 7

Blue
Red
Green

Question 8

Secondary Additive Colors

Answer 8

Cyan
Magenta
Yellow

Question 9

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

Answer 9

white light

Question 10

Look at the spectral reflection of different wavelengths

Answer 10

PIC in slides

Question 11

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

Answer 11

Color rendering index

Question 12

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

Answer 12

93.42

Question 13

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

Answer 13

Hue

Question 14

What possesses no hue

Answer 14

Black, white and grays

Question 15

The color itself

Answer 15

Hue

Question 16

Stains can be used to change the __ of porcelain color

Answer 16

Hue

Question 17

The purity of a color
intensity
saturation

Answer 17

Chroma

Question 18

The intensity of a color

Answer 18

Chroma

Question 19

High __ = highly saturated
Low __ = weak

Answer 19

Chroma

Question 20

Distinguished from a dark color
Blackness or whiteness

Answer 20

Value

Question 21

THe brightness of a color

Answer 21

Value

Question 22

High value =
Low value =

Answer 22

Brighter
Darker

Question 23

__ is the most important color variable in dental shade selection

Answer 23

Brightness

Question 24

__ is the most important aspect in shade selection

Answer 24

Value

Question 25

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

Answer 25

value

Question 26

Color perception Color may appear different if:

Answer 26

light source size and contours background color and lightening perception angle

Question 27

Receptors in the human eye

Answer 27

Rods and cones

Question 28

Convey shades of gray (value)

Answer 28

Rods (human eye)

Question 29

Allow brain to perceive hue and chroma

Answer 29

Cones (Human eye)

Question 30

Everything we see is __ light

Answer 30

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

Question 31

Full spectrum is required to see __

Answer 31

real color

Question 32

Recommended illumination for accurate shade selection in dentistry

Answer 32

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

Question 33

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

Answer 33

Metamerism

Question 34

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

Answer 34

light sources

Question 35

Staining of the porcelain will increase __

Answer 35

metameric responses

Question 36

Illumination aid

Answer 36

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

Question 37

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

Answer 37

Opalescence

Question 38

The optical property by which a material reflects ultraviolet radiation

Answer 38

Fluorescence

Question 39

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

Answer 39

Opaque

Question 40

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

Answer 40

Translucency

Question 41

What are the 4 shade guides

Answer 41

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

Question 42

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

Answer 42

Stump shade guide

Question 43

essential when working with translucid materials

Answer 43

Stump shade guide

Question 44

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

Answer 44

Stump shade guide

Question 45

Steps on how to select shade for vita classical

Answer 45

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

Question 46

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

Answer 46

1. Select value 2. Select chroma 3. Select Hue

Question 47

Key points for shade selection

Answer 47

Look at slide

Question 48

Record shade by dividing the facial/ buccal surface in __

Answer 48

thirds (look at slide)

Question 49

Photographs

Answer 49

Look at slide

Question 50

Cements as shade modifiers

Answer 50

Look at slide

Question 51

Whitening and shade selection

Answer 51

Look at slide