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Quiz 6 > Quiz 6 > Flashcards

Quiz 6 Flashcards

(55 cards)

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1
Q

A broken full denture may be repaired with

A

Self-cure acrylic

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2
Q

Zinc oxide-eugenol cement is used in temporary restorations because it

A

Provides a sedative effect on the pulp

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3
Q

What is the MOST important factor to consider when mixing a “paste to paste” type of composite resin?

A

Avoid leaving jars open, thus allowing photopolymerization

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4
Q

When should glass ionomer cement be applied?

A

Before it lose its shiny appearance

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5
Q

A maxillary diagnostic impression should extend posterior to include the

A

Maxillary tuberosities

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6
Q

Placing some alginate into the palatal vault immediately prior to seating the maxillary impression tray will help to

A

Ensure a full impression of a high palate

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7
Q

An advantage of using a vacuum mixer when pouring up study models is that it

A

Minimizes porosity

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8
Q

In preparing the tray for an alginate impression, which of the following types of wax is the BEST choice to use on the periphery?

A

Utility

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9
Q

When Polysiloxane is properly mixed, the material will be

A

Free from streaks and uniform in color

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10
Q

When polishing the teeth prior to direct bonding, which material should be used?

A

Flour of pumice mixture

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11
Q

The MOST critical aspect of the manipulation of glass ionomer cement is

A

Incorporation of components (powder/liquid) all at once

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12
Q

Which of the following may result if the etching solution is not rinsed thoroughly from the tooth?

A

Acid will interfere with bonding of the sealant

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13
Q

When using a model trimmer, the operator should

A

Use completely dry models

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14
Q

What appearance does dry enamel have after etching and rinsing?

A

Frosted

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15
Q

When using rubber base impression material, the dental assistant should

A

Coat the tray with adhesive

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16
Q

When cementing a TEMPORARY CROWN, zinc phosphate cement is usually

A

Not used because it sets too hard to be easy removed

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17
Q

If the adhesive inside the custom acrylic tray is not allowed to dry adequately, what may happen to the material?

A

It may separate from the tray

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18
Q

Excessive bubbles in stone or plaster cast will result in which of the following?

A

Decreased strength

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19
Q

When constructing a custom impression tray, a spacer is used to

A

Provide space for impression material

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20
Q

A retraction cord might be needed for which of the following procedures?

A

Cervical (Class V) composite

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21
Q

If it is necessary to assemble a broken denture in a fixed position for repair, what is the preferred wax?

A

Sticky

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22
Q

Polycarboxylate cement must be placed

A

While it is still glossy (brillante)

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23
Q

To prepare for a denture adjustment in the operatory, the acrylic bur would be placed in the

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A

Straight handpiece

24
Q

If a correctly proportioned mix of water is spatulated longer than recommended setting time be affected?

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A

Setting time will be faster

25
Which of the following cements is anticariogenic?
Glass ionomer
26
In modifying the tray for an alginate impression, which of the following types of waxes is the BEST choice to use on the periphery?
Boxing
27
An impression tray for a mandibular study model must extend beyond the
Retromolar pads
28
Which of the following types of temporary crown could be made using the initial impression as a matrix?
Resin
29
Increasing the water temperature when mixing alginate impression material results in a mix that is
Faster setting
30
Wax is placed along the posterior periphery of a maxillary impression tray to assure registration of the
Retromolar pad
31
Which of the following REQUIRES a glass slab for mixing?
Zinc phosphate
32
What is a PRIMARY advantage of zinc oxide eugenol cement?
Sedative effect on pulp
33
Which of these would be the BEST choice to cement a temporary acrylic crown?
Zinc oxide-eugenol (ZOE)
34
Which of the following is an advantage of light cured composite over self-cured composite material
Controlled working time
35
What makes glass ionomer anticariogenic?
Fluoride in powder
36
Which of the materials is usually selected for a pulp cap?
Calcium hydroxide
37
Which of the following bases or lines inhibits the setting of composite restorations?
Glass ionomer liner
38
Select the LEAST abrasive polishing agent for use on exposed dentin and restorations.
Zirconium silicate with glycerin
39
"Grit" refers to which of the following abrasive particle characteristics?
Size
40
Moisture contamination of gypsum products may
Increase spatulation time
41
Another term for the acrylic used to fabricate a temporary crown is
Methyl Methacrylate
42
The PRIMARY purpose for using a gypsum vibrator when pouring impression is to eliminate
Entrapped air
43
Athletic mouth guards should be stored on
A dry container
44
When a case is returned from the laboratory, the packing material should be
Recycled
45
The mixing time for gypsum products is seconds.
30 to 60 sec
46
Higher water temperatures used to mix gypsum products will have the following ref effect
Shorten setting time and increase expansion rate
47
A lower water/powder ratio, which reflects more powder and les water, result in:
Reduced strength
48
Final setting of gypsum product takes approximately:
30 minutes
49
Ideally, to ease the task of trimming the gypsum models, they should be submerged in:
Cool water for 5 minutes
50
Gypsum products should be properly stored in a/an:
Cool, dry air-right container
51
Which material should be tempered prior to taking an impression?
Reversible hydrocolloid
52
A custom tray is used as a:
Second impression for an edentulous impression
53
When mixing zinc phosphate cement, the powder and liquid are mixed over large are with a Figure-eight motion motion.
Figure-eight motion
54
Excess zinc phosphate cement powder left on the mixing slab is always:
Discarded
55
factor that will lengthen the setting time of zinc phosphate is:
Low temperature, below 65 F

Quiz 6 (1 decks)

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