Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Pres/Res > Quiz 3-physical Properties > Flashcards

Quiz 3-physical Properties Flashcards

1
Q

incident light

A

reflected, absorbed, or transmitted

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

opacity of dentin and enamel

A

dentin is more opaque

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

translucency

A

diffused transmission of light; light is dispersed (not transmitted)

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

opaque

A

no passage; scattering within may happen

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

refraction

A

light changes direction in a second medium

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

seeing color

A
  1. source emits light onto
  2. object
  3. color that we see is reflected off to the observer
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

3 indices of color

A

Hue, Value, and chroma

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

Hue

A

The dominant color of the object (red,yellow, or blue)

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

Hue of teeth

A

yellow to yellow-red

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

value

A

the lightness or darkness of a color (0 is black and 10 is white) teeth=6-8

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

Value of natural teeth

A

6-8

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

Chroma

A

the intensity of a color; is the object rich in color or pale?
0=achromatic and 18=saturated
teeth are weak

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

Color Content

A

different light sources have different wavelength components

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

better a light source matches standard

A

higher ranking

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

color rendition index

A

a measure of how well a light source renders color compared to standard (N daylight)

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

light source for color matching

A

> 90 CRI

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

Intensity

A

low level light and high level cause loss of color

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

ideal intensity is

A

1500-2500 lux

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

surroundings

A

modify the type of light reaching the object

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

Gloss

A

object; how much light is reflected off the object (moisture, roughness)

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

Individual response

A

normal people see different colors

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

color vision

A

5% of men and .5% of women have color deficiencies

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

receptor fatigue

A

causes a complementary color to be seen (red square, see blue square left behind)

24
Q

munsell system

A

plots 3 values of color on a scale; compare to color tabs

25
Q

Spectrophotometer

A

measures wavelength intensity reflected or transmitted

26
Q

Colorimeter-CIE

A

Commission international de l’eclarage; international org concerned with light and color

27
Q

L in LaB

A

L= luminance from 0-100

28
Q

A and b in LaB

A

Red=+a and green -a

+b=yellow and -b = blue

29
Q

Can give C lab coordinates

A

colorimeters and specs

30
Q

Dental shade guide tabs

A

organized sequence of models

31
Q

metamerism

A

when two objects appear to match under one light but not under another-metamers

32
Q

Fluorescence

A

the object emits light when illuminated by a specific light source; in real teeth so necessary in restorations

33
Q

Thermoconductivity

A

Quantity of heat in C/S passing through a body of 1cm thick with a cross-section of 1cm squared when temp diff is 1 C (conductors have high values)

34
Q

Thermal diffusivity

A

rate at which body with a nonuniform temp approaches equilibrium

35
Q

liner

A

layer of cement lining a filling/crown to prevent direct heat transfer to patient

36
Q

coefficient of thermal expansion (CTE)

A

change in length over original length x the change in temp

37
Q

dental importance of CTE

A

change in temp causing a change in shape of restoration

38
Q

electrical conductivity and restivity

A

measure of ability to conduct electric current

39
Q

dentin vs enamel conductor

A

dentin better for electricity

40
Q

carious teeth as conductors

A

less conductive

41
Q

Corrosion

A

deteriation by chemical or electrochemical rxn

42
Q

stimulants of corrosion

A

wet, salt, acids, warm, stress

43
Q

Anode

A

needed for corrosion; the surface where the corrosion occurs

44
Q

Cathode

A

needed for corrosion; where reduction rxns take place

45
Q

Electrolyte

A

needed for corrosion; a solution that conducts electricity-supplies the ions

46
Q

electromotive series

A

based on thermodynamics, ranking of relative corrosion resistance in metals; ideal in water and practical in Cl solns

47
Q

passivity

A

certain metals; limit corrosion, protects the metal or alloy from corrosion

48
Q

Electromotive series

A

resistance to corrosion

49
Q

uniform attack

A

corrosion all over

50
Q

Crevice Corrosion

A

i.e. oxygen depletion; results in specific areas of corrosion (think food on a restoration)

51
Q

Galvanic Corrsosion

A

when two metals are in physical contact (touching or soln between them) -Gold crown and amalgam in mouth; less noble (amalgam) will corrode and release ions

52
Q

Noble

A

higher (gold); protected from corrosion

53
Q

Anotic/Active

A

Low (mercury, silver, copper) will corrode and release ions

54
Q

Dental importance of corrosion

A
  1. Harm
    a. think mercury-do not want released
    Allergens-nickel released
    palladium allergen too
  2. esthetics compromised
55
Q

tarnish

A

surface discoloration which can be linked to corrosion

56
Q

other objects that tarnish

A

polymer materials

Pres/Res (14 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions