Brainscape's Knowledge GenomeTM

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


See full index

Restorative Dentistry > Amalgam > Flashcards

Amalgam Flashcards

1
Q

Factors contributing to resistance form of amalgam

A

1- Flat pulpal floor
2- Sufficient depth
3- Minimal extension
4- 90º cavosurface margin
5- Wall parallel to enamel rods
6- Rounded internal preparation angles

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

Indications of amalgam

A

Class I, II, V (where esthetic is not important/high caries risk)
Patient desire
Cost

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

Contraindications of amalgam

A

Allergy
Esthetic area
Conservative design is better

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

Factors contributing to retention form:

A

Primary retention: frictional retention, B-L wall convergence
Secondary retention: dovetail design

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

Which tooth has a preparation design resembling “snake eyes”?

A

Mandibular 1st premolars

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

Which bur can be used for initial amalgam cavity preparation?

A

245 (330L)/Elongated-pear
330/Pear

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

In an amalgam cavity preparation, M-D walls should be:

A

Divergent

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

The depth of the cavity should be:

A

1.5-2 mm

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

Over-triturated amalgam:

A

Mix is warm, shiny wet and soft

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

Under-triturated amalgam:

A

Mix will crumble due to weakness

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

Properly triturated amalgam:

A

Good shiny mix; homogenous mass, adhering together

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

How much should you overfill the amalgam cavity?

A

About 1 mm

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

In the postcarve burnishing, the purpose is to:

A

Improve marginal integrity and smoothness (not shiny)

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

In postcarve burnishing, which type of burnishers are used?

A

Small burnishers

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

Finishing and polishing of amalgam is done at which time?

A

After 24 hours

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

In maxillary molars, the outline of distal side of the oblique ridge is:

A

Round or oval

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

In maxillary molars, the outline of the mesial side of the oblique ridge is:

A

Butterfly

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

When should you extend the cavity preparation across a maxillary molar’s oblique ridge?

A

When it is undermined by caries
or
Less than 1.0 mm sound ridge structure remaining between M & D preparation

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

The outline form of maxillary premolars is:

A

Butterfly or U-shaped

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

For a mandibular 2nd premolar outline form, when should you not connect the mesial and distal pits?

A
  • Presence of transverse ridge (adds strength)
  • Absence of an occlusal fissure
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

It is permissible to repair a defective portion of an existing amalgam restoration if:

A

the remaining portion of the original restoration retains adequate resistance and retention form.

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

When caries are present in the proximal aspect without involving the marginal ridge, a proposed cavity design is:

A

Slot preparation

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

Components of a compound class II amalgam cavity:

A
  • Occlusal portion
  • Isthmus portion
  • Proximal portion
24
Q

In an amalgam cavity, the isthmus portion should be _______ than the occlusal.

A

Wider

25
Q

Lines that are detected for proper freeing of contact; they describe the shape of the buccal
and lingual walls of the proximal cavity at different situations of the contact area.

A

Ingrham’s lines

26
Q

In cases of open contact, Ingrham’s lines should be:

A

Straight

27
Q

The universal curve is used when:

A

Wide embrasures and broad contacts

28
Q

The revers curve is usually done in:

A

Buccal wall of class II

29
Q

Advantages of the reverse curve:

A
  • Proper freeing of contact
  • Obtaining of 90° C.S.A.
  • Increase bulk of the restoration to prevent marginal ditching at the bucco-proximal area
30
Q

Plunging cusps should be recontoured during:

A

The initial clinical procedure

31
Q

In a cavity prep, enter the pit nearest the involved proximal surface with a:

A

Punch-cut

32
Q

Which structure is an important guide in the proximal class II preparation?

A

DEJ

33
Q

The initial procedure in preparation of the outline form is the isolation of the proximal enamel by doing the:

A

Proximal ditch cut

34
Q

The proximal ditch cut is extended:

A

Gingivally:
- Just beyond the caries
- Or the proximal contact
(whichever is greater)

35
Q

Ideally, the extension of facial and lingual margins of a proximal box should be equal to _______ to provid:

A

It should be 0.2-0.3 mm from the adjacent tooth to provide clearance

36
Q

The axial wall is always placed in the dentin to obtain:

A
  • Resistance & elasticity of dentin
  • Bulk of the restoration
  • Placement of retentive locks
37
Q

The axial wall should NEVER be:

A

Concave

38
Q

The gingival seat consists of:

A

2/3rd of dentin and 1/3rd of enamel

39
Q

To ensure that the faciolingual dimension at the gingival is greater than at the occlusal, the proximal ditch cut may be:

A

Diverged gingivally

40
Q

To protect the gingiva and the rubber dam when extending the gingival wall, what could be placed?

A

A wooden wedge

41
Q

The proximal retention locks could be placed using which burs?

A

169L bur or the ¼ bur

42
Q

Retentive locks are placed in:

A

Axiofacial and axiolingual line angles

43
Q

Proximal retention locks should terminate at:

A

Axiopulpal point angle

44
Q

Retention locks should be placed _____ inside the DEJ, regardless of the depth of the axial walls and axial line angles.

A

0.2 mm

45
Q

The four characteristics or determinants of proximal locks:

A

1- Position
2- Translation
3- Depth
4- Occlusogingival orientation

46
Q

What should connect the tooth & amalgam?

A

Butt joint

47
Q

The cavosurface bevel should be:

A

20º

48
Q

Beveling is not required when:

A

The gingival margin is gingival to the CEJ

49
Q

To prevent the microleakege of the amalgam restoration, what should be applied on all the preparation walls?

A

Varnishes

50
Q

To reduce the postoperative sensitivity, what could be placed?

A

GLUMA desensitizer

51
Q

Disinfection of the preparation walls can be done by:

A

Silver nitrate
Phenol
Ethyl alchol (short duration)

52
Q

Amalgam condensation should occur first in:

A

The proximal box(es), filling about 1 mm first

53
Q

Early removal of the matrix bands leads to an increased risk of:

A

Marginal ridge fracture

54
Q

What may be used to carefully define the occlusal embrasure?

A

An explorer or a small Hollenback carver

55
Q

From which direction should the matrix be removed?

A

Linguooccluasally or (faciooccluasally)

Restorative Dentistry (2 decks)

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