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Fixed Pros Midterm Practice Exam > Practice tests > Flashcards

Practice tests Flashcards

1
Q

what was wrong with the prep shown on the interproximal surfaces?

A

Overconverged

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2
Q

what was wrong with the prep shown on the facial surface?

A

Cervical not 1.2 and incisal not 1.5-1.7

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3
Q

short walls cause loss of resistance. To fix this …..

A

you add restorative material or grooves

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4
Q

what was wrong with the prep shown?

A

Part had supragingival margin and part had subgingival

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5
Q

t/f: axial depth of chamfer should not be wider than half of the depth of the bur used:

A

true

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6
Q

t/f: rampent caries that can’t get under control, don’t do fixed prosethetics until they have it under control

A

true

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7
Q

path of insertion should be parallel to the long axis, parallel to proximal contacts,

A

all of the above

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8
Q

t/f: preparing without appropriate contact causes drifting, issues with final restoration, inflammation

A

true

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9
Q

t/f: preparation in hypo-occlusion: no problem; interim in hypo-occlusion, final will be in hyper

A

true

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10
Q

use bis-acryl for (indirect or direct)

A

indirect

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11
Q

t/f: PMMA is most exothermic and most shrinkage

A

true

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12
Q

t/f: axial reduction 1.5-2

A

false

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13
Q

toxicity and low physical strength with ____ ____

A

free monomer

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14
Q

t/f: eugenol is termination

A

true

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15
Q

t/f: OC:FL ratio is 0.25

A

false

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16
Q

t/f: OC:FL ratio is 0.25

A

false

you want 0.4

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17
Q

t/f: reduction on occlusal for porcelain should be 1 mm

A

false

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18
Q

t/f: seating groove helps with stop rotation, parallel to long axis and something else

A

true

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19
Q

t/f: round line angle is most important for all ceramic

A

true

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20
Q

t/f: grooves should be 90 degrees to disposing forces

A

true

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21
Q

t/f: forces coming in FL put grooves in MD

A

true

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22
Q

MC with porcelain collar: what finish line do you do?

A

shoulder for strength

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23
Q

t/f: adequate axial reduction use 2 plane

A

true

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24
Q

t/f: if patient is in pain do further examination

A

true

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25
Q

articulator to facebow approximates_____ contacts in mandibular movement

A

posterior

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26
Q

The purpose of a face-bow transfer to a semi-adjustable articulator is to?

A

The close approximation of posterior determinants for mandibular movement

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27
Q

Occlusal disturbances are evaluated? **

A

Intraoral exams

but also articulated diagnostic casts right?

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28
Q

the Right, tipping forces are due to

A

resistance

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29
Q

The treatment plan for a patient with rampant caries and plaque accumulation is

A. To place pin-retained amalgam restorations until the caries/plaque is under control

B. Not doing prosthodontic treatment until the caries/plaque is under control

C. Motivate the patient to control their oral health and have good oral hygiene

D. All of the above are true

A

All of the above

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30
Q

If you reduce the facial surface in a one-plane method of metal-ceramic and all-ceramic crowns, this can cause: *******

A

Possibility to pulp exposure

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31
Q

If you reduce the facial surface in a one-plane method of metal-ceramic and all-ceramic crowns, this can cause: *******

A

Possibility to pulp exposure

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32
Q

Overcontouring of which regions will cause displacement in the facial direction?

A

Lingual just above the cingulum

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33
Q

The facial shoulder on a metal-ceramic crown should

A

Extend lingual to the interproximal contact

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34
Q

The wall of an anterior tooth preparation should be 2 mm when the TOC is between 10-12 degrees. The occlusal-cervical : facial-lingual ratio should be 0.4 or higher on all teeth

A

1st statement is false, second statement is true

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35
Q

The seating groove

A

Prevents rotational movement

Limits the path of insertion to 1 direction

All of the above are true

All of the above!

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36
Q

The path of insertion should be

a- Parallel to the long axis of the tooth

b- Parallel to the proximal contact points to allow seating

c- Determined at the end of the preparatation

d- A and B are true

A

A and B are true

a- Parallel to the long axis of the tooth

b- Parallel to the proximal contact points to allow seating

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37
Q

Which of the following methods are not used to evaluate the occlusal convergence

a- Binocular vision through the mirror

b- Viewing the prep with one eye

c- Visualizing the mesial/distal convergence form the facial/lingual view

d- Visualizing the facial/lingual convergence from the anterior/posterior view

A

Binocular vision through the mirror

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38
Q

In a FGC, the nonfunctional cusp should be ____ mm and the functional cusp should be _____ mm

A

1.0, 1.5

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39
Q

The chamfer depth on a metal-ceramic crown should be

A

0.3-0.5 mm

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40
Q

When a patient exhibits pain or dysfunction

A

Further examine the patient to alleviate pain before you begin treatments

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41
Q

With a metal-ceramic crown, which of the following is true concerning the finish line on the facial surface

A

A shoulder allows an increase in strength, unlike the chamfer

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42
Q

With all-metal ceramic crown, why is a chamfer used

A

Better able to detect with impressions/dies

Uses an acute angle for good closure of the margins and a closer fit

Ease of placement

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43
Q

Margins on cast restorations should be placed

A

On enamel supragingivally

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44
Q

Identify Chamfer, Knife edge, beveled shoulder, and radial shoulder

A

good for u

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45
Q

Open proximal contacts of a temporary restoration can cause

A

Excessive adjustment of the permanent restoration

Tooth Migration

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46
Q

It is desirable to convert all of the free monomer into polymer because

A

Unreacted monomer is toxic

Better mechanical properties

47
Q

Eugenol will cause

A

Termination

48
Q

Which of the following is the best for direct technique and over-matrix method

A

Bis-acryl resin

49
Q

When using PMMA, a reason that you would want to choose the indirect over direct technique is

A

Protection of the tissues and pulp from heat/chemicals

50
Q

Metal ceramic restorations are indicated in all of the following except

a- Extensive tooth destruction

b- Need for full coverage with esthetic demands

c- Moderate carious lesions

d- Need for superior strength and retention

A

moderate carious lesions

51
Q

All-ceramic crowns should not be used on anterior teeth if

A

Opposing contact is on the cervical 1/5

52
Q

Which of the following do NOT decrease the likelihood of fracture in all-ceramic crowns

A

Sharp line angles

53
Q

Which of the following should not be used to polish/contour acrylic resins

A

Diamond points on high speed

54
Q

Occlusal prematurities/eccentric stops are detrimental to molars because

A

Off-axial loading due to the closeness of the muscles of mastication

55
Q

When you start to make an anterior all ceramic preparation,

A

Axial wall depth grooves cut on the facial

56
Q

A groove placed in a preparation should

A

Be 90 degrees to the axial wall

57
Q

On a metal-ceramic crown

A

Approaches the pulp quickly if the reduction is greater than 1.2-1.5 mm

58
Q

On a metal-ceramic crown

A

Approaches the pulp quickly if the reduction is greater than 1.2-1.5 mm

59
Q

As one axial wall gets shorter as compared to the wall of the tooth, resistance form ___________ , this happens most often in teeth with _____________ bases

A

Decreases, larger

60
Q

The treatment plan for a patient with rampant caries and plaque
accumulation is

a. To place amalgam restorations to preserve the teeth until the caries/plaque is under control

b. Not doing prosthodontic treatment until the caries/plaque is under
control

c. Motivate the patient to control their oral health and have good oral
hygiene

d. All of the above are true

A

all the above

61
Q

The facial shoulder on a metal-ceramic crown should

A

Extend lingual to the interproximal contact

62
Q

The wall of an anterior tooth preparation should be 2 mm when the TOC is
between 10-12 degrees. The occlusal-cervical : facial-lingual ratio should be 0.4 or higher on all teeth

A

1st statement is false, second statement is true

Explanation:

he wall of all teeth besides molars should be 3 mm and molars should be 4 mm. > same question idea, but was asked in an “in a study all of the following are true about adequate crown preps EXCEPT” and the incorrect answer was OC/FL ratio is at least 0.25 in all teeth (want 0.4)

63
Q

The seating groove

A

a. Prevents rotational movement

b. Limits the path of insertion to 1 direction

64
Q

The path of insertion should be

A

a. Parallel to the long axis of the tooth
b. Parallel to the proximal contact points to allow seating

also, It should be determined prior to beginning preparation

65
Q

Which of the following methods are NOT used to evaluate the occlusal
convergence

A

Binocular vision through the mirror

66
Q

In a FGC, the nonfunctional cusp should be reduced ____ mm and the
functional cusp should be reduced _____ mm

A

b. 1.0, 1.5

67
Q

In a collarless metal ceramic anterior crown (porcelain labial margin) what
type of margin should be used?

A

Radial shoulder at 90 degrees

68
Q

With a metal-ceramic crown, which of the following is true concerning the
finish line on the facial surface

A

A shoulder is used on the facial (depth of 1-1.2 mm) and a chamfer is used on the lingual (0.3-0.5)

69
Q

With all-metal ceramic crown, why is a chamfer used

A

a. Better able to detect with impressions/dies
b. Uses an acute angle for good closure of the margins and a closer fit
c. Ease of placement

ALL OF THE ABOVE

70
Q

Margins on cast restorations should be placed

A

On enamel supragingivally

71
Q

Open proximal contacts of a temporary restoration can cause

A

b. Excessive adjustment of the permanent restoration

c. Tooth Migration

72
Q

It is desirable to convert all of the free monomer into polymer because

A

a. Unreacted monomer is toxic

b. Better mechanical properties

73
Q

Eugenol will cause

A

termination

74
Q

Which of the following is the best for direct technique and over-matrix
method

A

Bis-acryl resin

75
Q

When using PMMA, a reason that you would want to choose the indirect over
direct technique is

A

Protection of the tissues and pulp from heat/chemicals

76
Q

Metal ceramic restorations are indicated in all of the following except

a. Extensive tooth destruction
b. Need for full coverage with esthetic demands
c. Moderate carious lesions
d. Need for superior strength and retention

A

c. Moderate carious lesions

77
Q

All-ceramic crowns should not be used on anterior teeth if

A

Opposing contact is on the cervical 1/5

78
Q

Which of the following should not be used to polish/contour acrylic resins

A

Diamond points on high speed

79
Q

Occlusal prematurities/eccentric stops are detrimental to molars because

A

Off-axial loading due to the closeness of the muscles of

mastication

80
Q

When you start to make an anterior all ceramic preparation

A

Axial wall depth grooves cut on the facial

81
Q

A groove placed in a preparation should

A

Be 90 degrees to the axial wall

82
Q

On a metal-ceramic crown

A

The mesial and distal walls should be perfectly parallel

The mesial and distal walls should be relatively close to parallel but they should still be a little converged. > “in a clinical study it was shown that adequate axial cervical reduction for a MCC prep can safely be placed at a depth of 2.0-2.5mm without risking exposure of the pulp”

83
Q

To increase resistance to faciolingual horizontal dislodgment, where should
you place grooves

A

Mesial & distal surfaces

84
Q

t/f: In a posterior metal ceramic crown preparation 1.00 mm occlusal reduction
should be reached when the occlusal surface is being restored with porcelain

A

false, you want to 2mm reduction

85
Q

Why is a chamfer margin recommended for a metal crown margin?

a. Allows for clean margin finishing
b. Easy to place and identify on a die
c. Allows for a thin margin while maintaining adequate bulk of metal
Nearby
d. All of the above

A

ALL OF THE ABOVE

86
Q

What technique is most appropriate for single unit interim crowns?

A

Direct Technique

87
Q

Consider indirect vs. direct with PMMA, which one is more protective?

A

Indirect Protects pulp from thermal and chemical damage

88
Q

t/f: Facial proximal and lingual proximal line angles are preserved for resistance

A

true

Rotational on horizontal axis

89
Q

What type of finish line is used on a collarless metal-ceramic?

A

Shoulder without bevel. aka @ 90 degrees

90
Q

Patient presents with TMJ and muscles problems; how do you treat?

A

further eval

91
Q

Patient has occlusal disharmonies; what do you do?

A

Articulate casts and perform an intra oral exam.

92
Q

t/f: As wall height decreases, resistance decreases. Arc of rotation happens more in teeth with wider bases.

A

true

93
Q

Occlusal posterior clearance for cast gold (full metal).

A

1-1.5

94
Q

Metal crowns can be used everywhere except where.

A

Intact facial and lingual

95
Q

All-ceramic crowns are avoided where?

A

In occlusal contact in cervical 1/5.

96
Q

t/f: Short walls cause inadequate resistance. Improved with grooves and boxes.

A

true

97
Q

t/f: Posterior metal-ceramic occlusal reduction is 1.0mm.

A

false

1.5 for porcelain and 0.5 for metal. 2 total

98
Q

What has the greatest polymer shrinkage and causes exothermia?

A

PMMA

99
Q

Chamfer for a metal crown has an axial depth of?

A

0.3-0.5

100
Q

What instrument is used to refine internal line angles?

A

hatchet

101
Q

Tooth preparation is done with all of the following except?

A

Occlusal-cervical:facial-lingual is 0.25.

102
Q

Incisal reduction of anterior metal ceramic.

A

2-2.5

103
Q

Why is a chamfer used for a cast metal restoration?

A

They are easy to form, adequately distinct on the tooth and die, and provides sufficient space that the metal is adequately rigid.

104
Q

On PFM, where does shoulder meet with chamfur?

A

Lingual to proximal.

105
Q
  1. Occlusal clearance for posterior ceramic crown of 1 is enough?
A

false

Is this talking about a full ceramic crown, if so… IDK, but if it is a PFM then it must be 2 mm= 1.5 ceramic and .5metal .

106
Q
  1. Picture of tipping tooth with short walls is about
A

a. Resistance

b. Improve by- grooves/ boxes

107
Q
  1. Why use chamfer for all metal?
A

a. all of the above: acute angle with metal, ease of ability etc).

108
Q
  1. most teeth just have to be 2mm tall. Need to be 0.4 or higher
A

a. first is false, second is true

109
Q
  1. picture of prep asked what is wrong with buccal and lingual walls
A

a. over-converged

110
Q
  1. what type of finish line for porcelain?
A

a. Modified shoulder or heavy chamfer

111
Q
  1. What is the measurement of a chamfer line?
A

a. 0.3-0.5mm

112
Q
  1. What finishing bur not for acrylic?
A

diamond point on highspeed

113
Q
  1. w/o proximal contact in provisional: what happens
A

food impaction/perioinflamm and mesial drift leading to more final adjustments or remake needed

114
Q
  1. reason for indirect provisional
A

protection of pulp from exothermic heat

Fixed Pros Midterm Practice Exam (1 decks)

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