Lecture #7

Question 1

Light source - Metamerism:

Answer 1

colors appear to vary w/ different lights

Question 2

Types of light

Answer 2

▪ Incandescent
▪ Fluorescent
▪ Natural daylight
▪ Halogen
▪ Tungsten/incandescent
▪ Warm fluorescent
▪ Daylight fluorescent

Question 3

Incandescent:

Answer 3

high conc. yellow waves (not for matching)

Question 4

Fluorescent:

Answer 4

high conc. blue waves (not for matching or dental office)

Question 5

Natural daylight:

Answer 5

full spectrum white light (north daylight – standard for matching)

Question 6

Halogen:

Answer 6

brighter/whiter than incandescent

Question 7

Tungsten/incandescent:

Answer 7

warm, relaxed (for reception)

Question 8

Warm fluorescent:

Answer 8

color same as tungsten w/ greenish tone (okay for matching)

Question 9

Daylight fluorescent:

Answer 9

close to daylight, still slight greenish tone (okay for matching)

Question 10

Color - Properties:

Answer 10

chroma = strength/saturation,
hue = basic shade, 
value = lightness/darkness

Question 11

Color - Lab* system:

Answer 11

L = light/dark, a = red/green, b = blue/yellow

Question 12

Color - Tooth effects:

Answer 12

● Chroma from dentin
● Newly erupted enamel is most opaque; young enamel masks chroma better
● Enamel thicker at incisal edge – masks more
● Young = larger pulp chamber = more red / older = less red