Desensitizers used to help prevent hypersensitivity should be used:

To seal all affected dentinal tubules

The term restorative describes the ability to:

Remove disease and restore function

What responsibility does the dental assistant provide during a permanent restorative procedure?

Provide moisture control by using the high velocity suction

Which condition listed is of greatest concern to the operator when preparing a Class V restoration?

Nearness of the lesion to the gingiva

Which of the following is true of the bonding process?

Avoid overdrying or desiccating the tooth;

A dental liner is placed:

In the deepest area of the tooth preparation

Which of the following is an advantage to using glass ionomer as a restorative material?

Glass ionomer releases fluoride after their final setting

Varnish should be placed in:

Two light coats after a sedative base

Which is the following correctly lists the different restorative materials from weak to strong?

Composite resin, silver amalgam, gold alloy

A porcelain casting is chosen over metal castings because of each of the following except that it:

Has a high thermal coefficient of expansion

Which statement is correct concerning wedges?

Both used to apply pressure and band presses the band against tooth

Complete the statement “when completing a permanent restoration, the dentist should have knowledge of:

The size and position of the pulp of the tooth

What is one advantage of an Automatrix over a universal matrix?

No retainer to hold the band in place

What is the final step in a cavity preparation?

Placing a desensitizing or lining agent

Esthetic criteria for a new dental restorative material state that the material must be:

Able to resemble natural dentition as closely as possible

Light-cured composite resin materials are supplied in all of the following ways except which of the following?

Light-cured composite resin materials require mixing

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Duplicate of PDA Ch 43, 44, 48, 49 Hw

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Questions 79

Answers

1
Desensitizers used to help prevent hypersensitivity should be used:
In large amounts
To seal all affected dentinal tubules
Wherever a dental base cement is required
In contact with soft tissue
2
The term restorative describes the ability to:
Restore function
Remove disease
Be esthetic
Remove disease and restore function
3
Which of the following is the instrument of choice when positioning a wooden wedge?
Amalgam carrier
Cow horn explorer
Mouth mirror
Howe pliers
4
_____ occurs when a metal restoration is touched by a fork.
Sheer stress
Micro leakage
Galvanic action
Corrosion
5
One of the fastest and most cost-effective ways of restoring the esthetic appearance of teeth is:
Bleaching
Porcelain veneers
Ceramic crowns
Composite veneers
6
What responsibility does the dental assistant provide during a permanent restorative procedure?
Check occlusion of the restoration
Provide moisture control by using the high velocity suction
Determine the types of materials to be used for the restoration
Administer local anesthetic
7
What is the component of the universal matrix retainer that holds the matrix band securely in the device called?
Diagonal slot
Spindle
Inner knob
Guide channel
8
The curing process in which it is the most critical that the materials are mixed and placed within the working and set..
Light-cured materials
Noncured materials
Auto-cured material
Dual-cured materials
9
What is the component of a universal matrix retainer that serves to hold the matrix band securely in the retainer?
Outer knob
Inner knob
Diagonal slot
Spindle
10
Which condition listed is of greatest concern to the operator when preparing a Class V restoration?
Placement of the gingival cord
Nearness of the lesion to the gingiva
Size of the lesion
Type of material the dentist will use
11
Which of the following is the most concentrated type of fluoride on the market?
Acidulated phosphate flouride (APF)
Fluoride Varnish
Stannous Flouride(SnF)
Sodium fluoride (NaF)
12
Which of the following is true of the bonding process?
It can be performed on only the dentin
Using a small amount of bonding material is better than using too much
Contamination will not hinder the bond
Avoid overdrying or desiccating the tooth;
13
A dental liner is placed:
In the deepest area of the tooth preparation
Along the interproximal margin
Along the inside of cavity walls
Mesial and distal of the tooth
14
The dental restorations created in the laboratory by the dental laboratory technician are classified as ___ restorations
Provisional
Indirect
Amalgam
Direct
15
Mylar strips are used for Class ___ restorations.
V
II
I
III
16
Stretching a rubber band is an example of which of the following type of stress?
Compressive
Rotational
Tensile
Shear
17
For there to be solid closure of margins where should the prongs of the tension ring for the Palodent system be placed?
Between the band and wedge
Distal to the band and wedge
Mesial to the band and wedge
Buccal to band and wedge
18
Which of the following is an advantage to using glass ionomer as a restorative material?
Glass ionomer has the ability to bind teeth mechanically rather than chemic
Loss of gloss indicates a proper mix of glass ionomer material
There is no need to avoid contact with water during the mixing procedure
Glass ionomer releases fluoride after their final setting
19
How long is the etchant material applied to the tooth being prepared for use of a bonding material?
1 Minute
It is left on the tooth and is sealed in under the restorative material
5-10 secs
15-20 secs
20
A desensitizer could be indicated for which of the following procedures?
Amalgam restoration
Fluoride application
Provisional coverage
Sealants
21
Materials that are versatile in their uses, such as for specialized dental bases, include:
Dental cements
Calcium hydroxide
Dental varnishes
Dental liners
22
Zinc phosphate cement should be mixed:
On a warm glass slab
With an amalgamator
On a paper pad
On a cool glass slab
23
Varnish should be placed in:
One thick layer after a sedative base
Two light coats after a sedative base
Two light coats before a sedative base
One thick layer before a sedative base
24
Which is the following correctly lists the different restorative materials from weak to strong?
Composite resin, silver amalgam, gold alloy
Silver amalgam, gold alloy, composite resin
Silver amalgam, composite resin, gold alloy
Composite resin, gold alloy, silver amalgam
25
A temporary restorative material should be selected to restore a tooth that has:
A missing cusp
Been prepared for a cast restoration
Sensitivity
Been prepared for a porcelain veneer
26
Which of the following types of composite resins is most often used today?
Macrofilled
Hybrid
Microfilled
Flowable
27
For adhesion to take place, ____ film thickness is desired.
A thin
A thick
A medium
Any
28
The __ is used to decrease the size of the matrix band loop after the band has been placed on the tooth.
Inner knob
Outer knob
Guide channel
Spindle
29
The ADA and the National Institute of Health-Nations Administration ___ the use of amalgam as a posterior restorative
Forbids
Supports
Has no opinion on
Discourages
30
Which direct restorative material may be selected for the permanent restoration is a Class I lesion?
Zinc oxide-eugenol
Gold inlay
Composite resin
Ceramic inlay
31
A porcelain casting is chosen over metal castings because of each of the following except that it:
Has the ability to match the color of natural tooth structure
Can improve the esthetic appearance of anterior teeth
Has a high thermal coefficient of expansion
Is a good insulator
32
In which teeth are Class II restorations found?
Maxillary lateral incisors
Maxillary and mandibular canines
Premolars and molars
Mandibular central incisors
33
A direct technique veneer is made of __, an indirect technique veneer is made of ___.
Composite; porcelain
Composite; composite
Porcelain; porcelain
Porcelain; composite
34
Which statement is correct concerning wedges?
The wedge presses the band against the tooth causing a light separation
A wedge is used to apply pressure to the apical and gingival walls
Both used to apply pressure and band presses the band against tooth
The most commonly used type of wedge is the rounded plastic form
35
Complete the statement “when completing a permanent restoration, the dentist should have knowledge of:
The directions of the enamel spindles
The size and position of the pulp of the tooth
The crown as it relates to the pulp of the tooth
Where the body of the tooth lies
36
Which is an example of a direct restorative dental material for a Class II restoration?
Composite resin
Teeth bleaching
Cavity
Veneer
37
What is the component of the universal matrix retainer that is always positioned In the mouth facing the gingiva called?
Outer guide slot
Diagonal slot
Spindle
Inner knob
38
A properly triturated amalgam mix should:
Contain dry particles
Be a soft, pliable mass
Separate when packed
Be a hard mass
39
What is one advantage of an Automatrix over a universal matrix?
Does not require use of a wedge
No retainer to hold the band in place
Requires no tightening of the band
Available in various sizes
40
Varnish should be placed on the ____ of the tooth cavity preparation.
Floor and walls but not margins
Margins and walls but not floor
Floor only and neither walls nor margins
Walls,floor, and margins
41
Which matrix system is used with posterior composite restorations?
Tofflemire
T-Band
Palodent
Automatrix
42
The larger side of the universal matrix band loop is always directed toward which part of the tooth?
Gingival one third
Occlusal one third
Buccal one third
Incisal one third
43
What is the final step in a cavity preparation?
Placing a desensitizing or lining agent
Placing retention forms
Designing the cavity walls
Placing the intermediate restorative material
44
Mixing alloy and mercury together to form a mass is called:
Percolation
Condensing
Curing
Amalgamation or trituration
45
If a cusp is lost during preparation, which matrix band would provide the best support while restoring?
Universal
Palodent
Extension
Copper
46
The silver filling material used for more than 150 yrs to restore primary and permanent teeth is called:
Glass ionomer
Amalgam
Composite
Acrylic resin
47
Tooth whitening, or bleaching, is NOT indicated for a dental patient with which condition?
Extrinsic stains from food,cigarette smoking,coffee or tea
Aged teeth
Intrinsic stains, such as mild tetracycline stains or mild fluorosis
Enamel hyperplasia
48
Esthetic criteria for a new dental restorative material state that the material must be:
Able to protect the tooth and tissues of the oral cavity
Easily formed and placed restoring comfort, function, and contour
Not capable of irritating tissues or being poisonous
Able to resemble natural dentition as closely as possible
49
Dental bonding is also referred to as:
Desensitizer
Dental base
Dental liner
Dental adhesion
50
Who preforms the majority of operative dental procedures?
Periodontist
Oral surgeon
Endodontist
General dentist
51
Light-cured composite resin materials are supplied in all of the following ways except which of the following?
Light-cured composite resin materials require mixing
Light-cured composite resin materials are supplied in various shades
Light-cured composite resin materials may be supplied in a lightproof syrin
Light-cured composite resin materials contain both the photo indicator and
52
Which matrix system is used for anterior composite resin or glass ionomer restorations?
T-Band
Clear plastic matrix
Tofflemire
Automatrix
53
Which of the following would be the material of choice as an insulating base as well as a sedative base?
Zinc oxide-eugenol cement
Polycarboxylate cement
Glass ionomer cement
Zinc phosphate cement
54
Where do Class V lesions occur?
Incisal edge
Facial surface
Occlusal surface
Gingival third
55
A necessary step in preparation for dentin bonding is application of:
An etchant and addition of the smear layer
Calcium hydroxide
Cavity varnish
An etchant and removal of the smear layer
56
Which of the following is NOT an expanded function for a dental assistant?
Retract the patients cheek or tongue
Place matrix band and wedge
Place a base and cavity liner
Place a bonding agent
57
Failure to place a protective base under a restoration can result in:
Occlusal trauma
Postoperative sensitivity and damage to the pulp
Premature loss of the restorative material
A premature contact on the restorative material
58
Which of the following would be the material of choice as an insulating base under a composite restoration?
Glass ionomer
Cavity varnish
Calcium hydroxide
Zinc oxide-eugenol
59
Why is a matrix band contoured prior to placing the restorative material?
To ensure that there is no cupping of the final restoration
To ensure that the band will fit the tooth being restored
To ensure that the final restoration will have proper contact with adjacent
To curl the band to make it easier to fit the tooth
60
When one or both of the proximal surfaces are removed during a preparation, how is the filling material retained?
Line angle
Matrix system
Cavity wall
Resistance form
61
Which of these is the step in initial cavity prep. When the dentist decides on design and depth of tooth structure
Convenience form
Retention form
Outline form
Resistance form
62
The addition of ___ alloy to glass ionomers produces a product that can be used for core buildups and the repair of frac
Gold
Zinc
Silver-tin
Copper
63
Which statement is INCORRECT concerning veneers?
Good oral hygiene is essential to keep the margins free of plaque and decay
Veneers have an unlimited life span
Veneers can be cracked by biting into hard surfaces such as ice
Veneers can discolor,wear,or chip over a period of time
64
Where is the wedge positioned when placing a posterior restoration?
Facial
Buccal
Lingual
Labial
65
Which statement is INCORRECT regarding brush-on whitening methods?
It must be used regularly
It can cause blotches on the teething not used properly
It is inhibited by saliva
It is as effective as other tooth whitening methods
66
Patients may feel sensitivity after the placement of a restoration:
For several months
Immediately
After a month
At any time
67
Dental varnish is used in the cavity preparation to:
Seal dentinal tubules and reduce leakage around a restoration
Obtund pain
Insulate the pulp from thermal changes
Stimulate growth of reparative dentin
68
Which of the following types of Pulpal stimuli may be associated with traumatic occlusion?
Mechanical
Biological
Physical
Chemical
69
Once the Automatrix band is positioned on the tooth, how is the band tightened?
A wrench turns the coil clockwise to tighten the band
Fingers are used to turn the coil until it is snug
It is wedged to form the contour
A wrench turns the coil counterclockwise to tighten the band
70
ZOE mixed to base consistency should NOT be:
Thick and putty like
Tapped lightly into the preparation with a condenser
Placed to cover the entire Pulpal floor
Rolled into one large ball
71
Which procedure is included under the umbrella of esthetic dentistry?
Endodontic therapy
Whitening technique
Stainless steel crowns
Silver amalgam
72
Insulating base material should cover the entire___ to a thickness of ___mm.
Pulpal floor; 1 to 2
Cavity preparation; 2 to 3
Cavity preparation ; 1 to 2
Pulpal floor; 3 to 4
73
All of the following statements are true about the application of etchant material EXCEPT:
The tooth must be free of debris
It is cured for 15-30 seconds
The tooth must be thoroughly dried
The etchant gel is placed only where needed
74
A comprehensive Class II restoration can involve as many as ___ surfaces of a tooth.
Four
Two
One
Three
75
Which statement is true regarding retention of pins?
Retention pin has deep threads that grip the dentin when screwed into tooth
Three pins are inserted to replace each missing cusp
Pins are always 0.023mm in diameter and extended 2mm into tooth structure
Pins are placed into the root canal of the tooth
76
What is the material of choice for a universal matrix band?
Thin,flexible copper
Celluloid
Thick, flexible. stainless steel
Thin,flexible stainless steel
77
Which statement is INCORRECT concerning tooth whitening?
Tooth whitening can be achieved using over the counter products
The main ingredient for whitening products is peroxide or a form of it
Tooth whitening can have some adverse effects on the teeth
Tooth whitening is permanent
78
Which of the following statements is true?
Class V lesion is prepared by having a smooth surface outline with angles
Class V lesion location will determine the type of restorative material
Class V restoration is defined as a pit and fissure restoration
ClassV lesion occurs on the incisal third of the facial and lingual surface
79
An example of a biological pulpal stimulus is:
Acidic materials reaching pulpal tissues
Changes from hot and cold coming into contact with the tooth
Traumatic occlusion, which occurs when a persons “bite” does not occlude
Bacteria from saliva coming into contact with pulpal tissues

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