* Focused Lec Quiz 3/30 Wk 3 Color Science Selection Flashcards

1
Q

Steps to color matching a tooth:

A

Selection of shade in office, duplication of shade in lab

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Color is determined by:

A

light that eters eye reflected from object

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Visible light spectrum:

A

380-750nm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Predominant colors:

A

red, green, blue

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

short waelngth

A

blue

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

medium wavelenght:

A

green

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Long wavlength:

A

red

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

All 3 primary colors -

A

white

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Apples

A

subtract or absorb, subtractive color is reflected off, pigment subtracts white from the shade

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Types of color

A

1’, 2’ and complimentary

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Color perception depends on:

A

light source, object property, visual perception

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Fluourescent light emits:

A

blue waves

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Incandescent light emits:

A

yellow waves

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Light source of dental overhead light:

A

LED

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Color corrected light source temperature

A

5,500 ‘ K + color rendering index of 90+

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

of daylight

A

6,500 ‘ K

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Light on an object can:

A

reflected, absorbed, or

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Light on an object can:

A

reflected, absorbed, or transmitted

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Rod cells:

A

increases in concentration toward the periphery

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

3 cell types of cones process:

A

short, medium and long wv’s

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

To compare one color to the next w accuracy

A

Mensel: Hue, vlue and chroma (1st to organized all color perceptions)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Hue:

A

color family

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

chroma:

A

color intensity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

TF? Object of different hues can be of identical value.

A

T

25
Q

Introduced delta e

A

CIE, L* (0=black, 100 = white, a* - = green, A*+ =

26
Q

Vitapan classical shade guide

A

1950’s

27
Q

Introduced delta e

A

CIE, L* (0=black, 100 = white, a* - = green, A+ = red, B - + blue, B*+ = yellow

28
Q

Shade selection in dentistry can be done by 1 of these 2 methods:

A

visual or instrumental

29
Q

Vitapan classical shade guide, when introduced?

A

1950’s

30
Q

A hue in Vitapan system:

A

yellow red

31
Q

B hue in Vitapan system:

A

yellow

32
Q

C hue in Vitapan system:

A

grey

33
Q

D hue in Vitapan system:

A

Red, yellow, grey

34
Q

How to aoid metamerism

A

select shade, confirm under different seting

35
Q

Colors of office to avoid

A

red and yellow

36
Q

Bright env, makes tooth shade look:

A

duller

37
Q

Don’t take more than __s to choose shade

A

1-5s

38
Q

Modern methods to quantify color:

A

spectrophotometry, colorimeters,

39
Q

Additive:

A

light emitted directly from source (3 primary to make other color)

40
Q

How to aoid metamerism

A

select shade, confirm under different setting

41
Q

subtractive can be thought of as:

A

absorbing light energy

42
Q

subtractive can be thought of as:

A

absorbing light energy

43
Q

Colorants involved in subtractive color system:

A

pigments, dyes

44
Q

Closest to emitting the full spectrum of white light:

A

daylight, the standard

45
Q

Color rendering index (CRI)

A

How well a light source renders color, compares to standard source (northern daylight)

46
Q

Northern daylight average temperature:

A

6,500’ K

47
Q

Scale of CRI:

A

0-100

48
Q

Color temperature:

A

Measure of light source color when illuminated

49
Q

Cornea, convex or concave:

A

convex

50
Q

of light sensitive receptors in eye:

A

Millions

51
Q

Center of the retina has these:

A

Cone cells

52
Q

Photopic vision:

A

Cone cells, phootreception

53
Q

Scotopic visions

A

Rod cells, low light conditions, shapes can be distinguished but not color

54
Q

How many types of cone cells in eye?

A

3

55
Q

Color quantification system:

A

Munsel

56
Q

Calculating differences in color via Munsel system, easy or hard?

A

hard

57
Q

1st shade guide:

A

Vitapan classic

58
Q

Order of shade selection in Vitapan:

A

hue, then chroma

59
Q

When looking at color for a long time:

A

color appears less saturated –> grey, chroma intensity of complimentary colors appears greater