Brainscape's Knowledge GenomeTM

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


See full index

OPEDENT > 14. Amalgam > Flashcards

14. Amalgam Flashcards

1
Q

True or false

INDICATIONS of using amalgam

→ primary and permanent teeth
→ moderate to large Class I and II restorations including
restorations that involve:
o heavy occlusion
o cannot be isolated well
o extend onto the root surface

A

T

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

True or false

INDICATIONS of using amalgam

Class V restorations including restorations that are:

o not esthetically critical
o cannot be well isolated
o located entirely on the root surface

A

True

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

an alloy made by mixing mercury with a silver-tin amalgam alloy

A

DENTAL AMALGAM

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

COMPOSITION of dental amalgam

_____+ amalgam alloy = dental amalgam

A

mercury

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

COMPOSITION of dental amalgam

(Hg) + (Silver, Tin, Copper,_____) = dental amalgam

A

Zinc

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

a _______ amalgam alloy added with varying amounts of mercury and small amount of zin

A

silver-tin

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

What is the composition of amalgam alloy?

A

Silver, Tin, Copper, Zinc

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

→ 67-70%
→ strength

Silver
Tin
Copper
Zinc

A

Silver

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

→ 25-27%
→ workability and strength

Silver
Tin
Copper
Zinc

A

Tin

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

→ 6% or less (3-5%)

Silver
Tin
Copper
Zinc

A

Copper

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

→ strength and corrosion resistance

Silver
Tin
Copper
Zinc

A

Copper

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

→ maximum of 2%
→ may or may not be present

Silver
Tin
Copper
Zinc

A

Zinc

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

→ suppress oxidation

Silver
Tin
Copper
Zinc

A

Zinc

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

has the potential to be hazardous if not managed properly

A

MERCURY

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

the alloying reaction of mercury with the ______ go to completion to ensure that mercury does not diffuse into the oral
environment

A

Ag-Sn alloy

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

the critical times are when metallic mercury exists in____ or ____ form rather than bound in a set amalgam

A

liquid or
vapor

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

as a vapor, metallic mercury can be inhaled and absorbed
through the alveoli in the lungs at ____ % efficiency

A

80%

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

1:1 mercury:alloy ratio

A

MERCURY-TO-ALLOY RATIOS

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

this ratio is one portion of mercury to one portion of alloy by
weight

A

MERCURY-TO-ALLOY RATIOS

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

Eames Technique

A

MERCURY-TO-ALLOY RATIOS

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

DENTAL AMALGAM
classified according to (3)

A

(1) amalgam alloy particle geometry and size
(2) copper content
(3) zinc content

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

What are the particle type?

A

Lathe-Cut Particles

Spherical Particles

Dispersion System

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

→ regular cut, fine cut and microfine cut

A. Lathe-Cut Particles
B. Spherical Particles
C. Dispersion System

A

A

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

→ require much less mercury to make a particular mixture

A. Lathe-Cut Particles
B. Spherical Particles
C. Dispersion System

A

B

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

the particles were packed more efficiently

A. Lathe-Cut Particles
B. Spherical Particles
C. Dispersion System

A

B

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

increased the fluidity of the mixture by
presenting less resistance to particle sliding

A. Lathe-Cut Particles
B. Spherical Particles
C. Dispersion System

A

B

27
Q

mixed geometries

A. Lathe-Cut Particles
B. Spherical Particles
C. Dispersion System

A

C

28
Q

dispersed alloy

A. Lathe-Cut Particles
B. Spherical Particles
C. Dispersion System

A

C

29
Q

Low-Copper Amalgam Alloy contain?

A

contain 2-5% copper

30
Q

High-Copper Amalgam Alloy contain?

A

contain 12-30% copper

31
Q

Low-Copper Amalgam Alloy:

Ag percent?

A

69.4%

32
Q

Low-Copper Amalgam Alloy:

Sn %?

A

26.2%

33
Q

Low-Copper Amalgam Alloy:

Cu %?

A

3.6%

34
Q

Low-Copper Amalgam Alloy:

Zn %?

A

0.8%

35
Q

High-Copper Amalgam Alloy:

Ag %?

A

60%

36
Q

High-Copper Amalgam Alloy:

Sn %?

A

27%

37
Q

High-Copper Amalgam Alloy:

Cu%?

A

13%

38
Q

High-Copper Amalgam Alloy:

Zn %?

A

0%

39
Q

ZINC CONTENT can be:

A

o zinc containing
o non-zinc containing

40
Q

𝐴𝑔3𝑆𝑛 + 𝐻𝑔 = 𝐴𝑔3𝑆𝑛 + 𝐴𝑔2𝐻𝑔3 + 𝑆𝑛7𝐻𝑔8

A

PHASES OF DENTAL AMALGAM

41
Q

Ag3Sn

A

Gamma Phase

42
Q

Ag2Hg3

A

Gamma 1 Phase

43
Q

Sn7Hg8

A

Gamma 2 Phase

44
Q

strongest phase

A

Gamma Phase

45
Q

should occupy the maximum volume in the restoration

A

Gamma Phase

46
Q

crystals are small and equiaxed

A

Gamma 1 Phase

47
Q

intermediate corrosion resistance

A

Gamma 1 Phase

48
Q

crystals are long and blade-like

A

Gamma 2 Phase

49
Q

prone to corrosion

A

Gamma 2 Phase

50
Q

results in porous spongy amalgam with mechanical
resistance

A

Gamma 2 Phase

51
Q

PROPERTIES OF DENTAL AMALGAM

A

Setting Time

Plasticity

Strength

Creep

Dimensional Change

Corrosion and Tarnish

Tensile Strength

52
Q

relates to the technique employed to condense it to prepared cavity

A. Setting Time
B. Plasticity
C. Strength
D. Creep
E. Dimensional Change
F. Corrosion and Tarnish
G. Tensile Strength

A

B

53
Q

True or false

High plasticity requires greater condensing force

A

FALSE

LOW plasticity requires greater condensing force

54
Q

final strength is achieved 24 hours after placement

A. Setting Time
B. Plasticity
C. Strength
D. Creep
E. Dimensional Change
F. Corrosion and Tarnish
G. Tensile Strength

A

C

55
Q

amount of Hg present in the final restoration relates to ____

A. Setting Time
B. Plasticity
C. Strength
D. Creep
E. Dimensional Change
F. Corrosion and Tarnish
G. Tensile Strength

A

C

56
Q

more than 52% of Hg results in decreased _____

A. Setting Time
B. Plasticity
C. Strength
D. Creep
E. Dimensional Change
F. Corrosion and Tarnish
G. Tensile Strength

A

C

57
Q

percentage of flow under pressure at mouth temperature

A. Setting Time
B. Plasticity
C. Strength
D. Creep
E. Dimensional Change
F. Corrosion and Tarnish
G. Tensile Strength

A

D

58
Q

deformation with time in response to a constant stress

A. Setting Time
B. Plasticity
C. Strength
D. Creep
E. Dimensional Change
F. Corrosion and Tarnish
G. Tensile Strength

A

D

59
Q

high copper alloy decreases corrosion

A. Setting Time
B. Plasticity
C. Strength
D. Creep
E. Dimensional Change
F. Corrosion and Tarnish
G. Tensile Strength

A

F

60
Q

polishing reduces corrosion

A. Setting Time
B. Plasticity
C. Strength
D. Creep
E. Dimensional Change
F. Corrosion and Tarnish
G. Tensile Strength

A

F

61
Q

loss of material at the margin

A. Setting Time
B. Plasticity
C. Strength
D. Creep
E. Dimensional Change
F. Corrosion and Tarnish
G. Tensile Strength

A

G

62
Q

butt joint margin increases tensile strength

A. Setting Time
B. Plasticity
C. Strength
D. Creep
E. Dimensional Change
F. Corrosion and Tarnish
G. Tensile Strength

A

G

63
Q

too high Hg content and ultrafine alloy produces
low tensile strength

A. Setting Time
B. Plasticity
C. Strength
D. Creep
E. Dimensional Change
F. Corrosion and Tarnish
G. Tensile Strength

A

G

OPEDENT (9 decks)

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