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CH 43,44,48,49 Flashcards | StudBud
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CH 43,44,48,49
CH 43,44,48,49
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1
Which statement is incorrect concerning tooth whitening
the main ingredient for whitening products is peroxide
tooth whitening is permanent
tooth whitening can have some adverse effects on the teeth
tooth whitening can be achieved using over the counter
2
The term restorative describes the ability to:
remove disease
restore function
remove disease & restore function
be esthetic
3
component of uni matrix serves to hold the matrix band securely in the retainer
outer knob
diagonal slot
spindle
inner knob
4
Zinc phosphate cement should be mixed:
on a cool glass slab
on a paper pad
on a warm glass slab
with an amalgamator
5
One of the fastest & most cost effective ways of restoring the esthetic appearance of teeth is:
bleaching
porcelain veneers
composite veneers
ceramic crowns
6
insulating base material should cover the entire __ to a thickness of __ mm
pulpal floor; 1 to 2
cavity preparation; 1 to 2
pulpal floor; 3 to 4
cavity preparation: 2 to 3
7
Tooth whitening or vital bleaching is not for a patient with
aged teeth
enamel hyperplasia
extrinsic stains from food, cig smoking
instrinic stains
8
cusp is lost during prep, which matrix band would provide best support while restoring
palodent
copper
universal
extension
9
What is the final step of cavity prep
placing a desensitizing or lining agent
designing the cavity walls
placing retention forms
placing the intermediate
10
which statement is incorrect concerning veneers
veneers can be cracked by biting
good oral hygiene is essential
unlimited lifespan
veneers may discolor
11
which is not expanded function for DA
retract the patient cheek and tongue
place a bonding agent
place a base and cavity liner
place matrix band and wedge
12
In which teeth are class II restorations found?
premolar and molars
maxillary & mandibular canines
mandibular central incisors
maxillary lateral incisors
13
Which is an example of a direct restorative dental material
teeth bleaching
composite resin
veneer
cavity
14
Which of the following is an advantage to using glass ionomer as a restor. material ?
there is no need to avoid contact w water during mixing proc
glass ionomer releases fluoride after their final setting
loss of gloss indicates a proper mix of glass ionomer material
glass ionomer has ability to bind to teeth mechanically rather than chem
15
ZOE mixed to a base consistency should NOT be:
thick & putty like
rolled into a one large ball
placed to cover the entire pulpal floor
tapped lightly into the prep with a condenser
16
The larger side of uni matrix band loop is directly toward
incisal one third
gingival one third
buccal one third
occlusal one third
17
Failure to place a protective base under a restoration can result in:
postoperative sensitivity & damage to the pulp
occlusal trauma
premature loss of the restorative material
premature contact on the restorative material
18
A properly triturated amalgam mix should:
be a hard mass
be a soft, pliable mass
contain dry particles
separate when packed
19
which of the following statements is true?
the class V lesion location will determine the type of restoration
the class v lesion occurs on the incisal third of the facial
the class V lesion is prepared by having a smooth surface
the class V restoration is defined as a pit fissure restoration
20
Which of the following types of comp. resins is most often used today?
hybrid
macrofilled
flowable
microfilmed
21
Light cured comp resin materials are supplied in these ways except?
light cured comp resin materials contain both the photo intitator & the ami
light-cured comp resin materials are supplied in various shades
light cured comp resin materials require mixing
light-cured comp resin materials may be supplied in a lightproof syringe
22
where do class V lesions occur
gingival third
incisal edge
occlusal surface
facial surface
23
Who performs the majority of operative dental procedures?
general dentist
endodontist
oral surgeon
periodontist
24
a dental liner is placed:
mesial & distal of the tooth
along the interproximal margin
along the inside of cavity walls
in the deepest area of the tooth prep
25
The ADA & the NIHNA __ the use of amalgam as a posterior restorative material
forbids
has no opinion on
supports
discourages
26
How long is the etchant material applied to the tooth being prepared for use of a bonding material ?
1 min
15 to 20 sec
5 to 10 sec
it is left on the tooth and is sealed under the restorative material
27
Mixing alloy & mercury tg to form a mass is called:
condensing
amalgamation or trituration
percolation
curing
28
what is the DA’s responsibility during a perm restorative procedure
check occlusion
administer local anesthesia
provide moisture control by using high
determine the types of materials to be used for the restoration
29
For adhesion to take place,__ film thickness is desired
thin
any
a thick
a medium
30
All of the following statements are true abt application of etchant material except:
the tooth must be free of debris
it is cured for 15 to 30 seconds
the etchant gel is placed only where needed
the tooth must be throughly dried
31
Varnish should be placed in:
one thick layer before a sedative base
one thick layer after a sedative base
two light coats after a sedative base
two light coats before a sedative base
32
A necessary step in prep for dentin bonding is application of:
an etchant & removal of the smear layer
cavity varnish
an etchant & addition of the smear layers
calcium hydroxide
33
material of choice for universal matrix band
thin, flexible stainless steel
celluloid
thin, flexible copper
thick, flexible stainless steel
34
which direct restorative material may be for the class 1 lesion
gold inlay
ceramic inlay
composite resin
zinc oxide-eugenol
35
Desensitizers used to help prevent hypersensitivity should be used:
to seal all affected dentinal tubules
wherever a dental base cement is required
in large amounts
in contact w soft tissues
36
instrument of choice when positioning a wooden wedge
amalgam carrier
howe pliers
cow horn explorer
mouth mirror
37
Which statement is true regarding retention of pins
pins are placed into the root canal
pins are always 0.023
the retention pin has deep threads
in general three pins are inserted to replace each missing cusp
38
uni matrix component positioned in the mouth facing gingiva called
spindle
outer guide slot
diagonal slot
inner knob
39
A temporary restorative material should be selected to restore a tooth that has:
been prepared for a cast restoration
been prepared for a porcelain veneer
sensitivity
a missing cusp
40
Dental bonding is also referred to as:
desensitizer
dental adhesion
dental liner
dental base
41
The _ is used to decrease size of the matrix band loop
spindle
inner knob
guide channel
outer knob
42
Which types of pulpal stimuli may be associated w traumatic occlusion
mechanical
chemical
physical
biologic
43
Dental restorations created in the lab by the dental lab tech are classified as __ restorations
provisional
indirect
amalgam
direct
44
universal matrix retainer that HOLDS the matrix band securely in the device
Guide channel
diagonal slot
Inner knob
Spindle
45
which statement is incorrect regarding brush-on whitening
it is inhibited by saliva
it can cause blotches on the teeth
it is as effective as other tooth-whitening methods
it must be used regularly
46
the addition of __ alloy to glass ionomers produces a product that can be used for core buildups & the repair of fractur
silver-tin
gold
zinc
copper
47
Which of the following is true of the bonding process?
using a small amount of bonding material is better than too much
contamination will not hinder the bond
it can be performed on only the dentin
avoid over drying
48
Which would be the material of choice as an insulating base under a comp restoration
cavity varnish
glass ionomer
zinc oxide-eugenol
calcium hydroxide
49
which statement is correct concerning wedges
the most commonly used type of wedge is the rounded plastic form
the wedge presses the band against the tooth causing a slight separation
a wedge is used to apply pressure to the apical & gingival walls of the pre
both a wedge is used to apply pressure to the apical & gingival walls of
50
mylar strips are used for class__ rest
II
I
III
V
51
Which of the following material would be chosen as an insulating base as well as sedative base?
zinc phosphate cement
polycarboxylate cement
zinc oxide-eugenol cement
glass ionomer cement
52
why is a matrix band contoured prior to placing the restorative material
to ensure that the band will fit the tooth
to curl the band to make it easier to fit the tooth
to ensure that their is not cupping of the final restoration
to ensure that the final restoration will have proper contact w the adjacen
53
which condition listed is the greatest concern of the operator for class V restoration
type of material the dentist will use
size of lesion
placement of gingival cord
nearness of the lesion to the gingiva
54
where is the wedge positioned when placing a posterior restoration
labial
lingual
facial
buccal
55
Which procedure is included under the umbrella of esthetic dentistry
endodontic therapy
whitening techniques
stainless steel crowns
silver amalgam
56
an example of a biological pulpal stimulus is:
bacteria from saliva coming into contact with pulpal tissues
traumatic occlusion, which occurs when a persons bite does not occlude prop
changes from hot & cold coming into contact w the tooth
acidic materials reaching pulpal tissues
57
When completing a permanent restoration, the dentist should have knowledge of
where the body of the tooth lies
the direction the enamel
the size, position of the pulp of the tooth
the crown as it relates to the pulp of the tooth
58
varnish should be placed on the __ of the tooth cavity prep
walls, floor, and margins
floor and walls but not margins
margins & wall but not floor
floor only and neither walls nor margins
59
a desensitizer could be indicated for which procedure?
provisional coverage
sealants
amalgam restoration
fluoride application
60
A porcelain casting is chosen over metal because of the following except
is a good insulator
can improve the esthetic appearance of ant teeth
has the ability to match the color of natural tooth struc
has a high thermal coefficient of expansion
61
materials that are versatile in their uses, such as for specialized dental bases include:
calcium hydroxide
dental cements
dental varnishes
dental liners
62
Once automatrix band is positioned on tooth how is the band tightened
a wrench turns to coil clockwise
it is wedged to form the contour
a wrench turns the coil counterclockwise
fingers are used to turn coil
63
Which lists the diff restorative materials weak to strong
composite resin, gold alloy, silver amalgam
composite resin, silver amalgam, gold alloy
silver amalgam, gold alloy, composite resin
silver amalgam, composite resin, gold alloy
64
dental varnish is used in the cavity prep to:
insulate the pulp from thermal changes
seal dentinal tubules & reduce leakage around restoration
obtund pain
stimulate growth of reparative dentin
65
A direct technique veneer is made of__ an indirect veneer is made of __
composite, composite
composite, porcelain
porcelain; composite
porcelain; porcelain
66
The silver filling material used for more than 150 yrs to restore primary & permanent teeth is called:
amalgam
glass ionomer
acrylic resin
composite
67
when one or both of the proximal surfaces are removed during a prep, how is the filling material retained while restorin
line angle
matrix system
cavity wall
resistance film
68
Which is the most concentrated type of fluoride
stannous fluoride (SnF)
fluoride varnish
Acidulated phosphate fluoride (APF)
sodium fluoride (NaF)
69
which matrix system is for anterior composite or glass ionomer rest
tofflemire
clear plastic matrix
automatrix
t band
70
a comprehensive class II restoration can involve as many as
three
two
one
four
71
Stretching a rubber band is an ex of which of the following types of stress?
tensile
rotational
shear
compressive
72
patients may feel sensitivity after the placement of a restoration:
at any time
immediately
after a month
for several months
73
Which matrix is used w posterior comp restorations
tofflemire
t band
palodent
automatrix
74
Esthetic criteria for a new dental restorative material state that the material must be:
easily formed and placed restoring comfort, function & contour
able to resemble natural dentition as closely as possible
not capable of irritating tissues or being poisonous
able to protect the tooth & tissues of oral cavity
75
what is one advantage of an automatrix over universal
does not require use of wedge
requires no tightening of band
no retainer to hold the band in place
available in various sizes
76
for there to be a solid closure of margins on posterior comp rest where should the prongs of the tension ring be placed
distal to the band and wedge
mesial to the band & wedge
buccal to the band and wedge
between the band & wedge
77
___ occurs when a metal restoration is touched by a fork
galvanic action
sheer stress
microleakage
corrosion
78
which of the following is the first step to cavity prep
outline form
convenience form
resistance form
retention form
79
curing process where it is the most critical that materials are mixed & plced within the workin & settin times is with:
auto-cured materials
dual-cured materials
non cured materials
light cured materials
