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s3 Flashcards

1
Q

A newly condensed amalgam restoration seems to chip away when being caved. What is the likely cause of this problem?
a. The amalgam was condensed after its working time elapsed
b. A low capper alloy was used
c. Moisture contamination occurred
d. The alloy was incompletely wetted with mercury

A

a. The amalgam was condensed after its working time elapsed

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2
Q

What do you use to etch the intaglio surface of porcelain veneers?
a. Silane coupling agent
b. Hydrogen peroxide
c. 9.6 % Hydrofluoric acid
d. 37% Phosphoric acid

A

c. 9.6 % Hydrofluoric acid

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3
Q

A silane primer is used to condition the internal surface of which of the following indirect veneer?
a. composite veneer
b. porcelain veneer
c. both of the above
d. none of the above

A

c. both of the above

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4
Q

Which of the following food has a high fluoride content?
a. Meat
b. Salmon

c. Eggs
d. Vegetables

A

b. Salmon

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5
Q

Most amalgam alloys are comprised of approximately what percentage of silver?
a. 50 %
b. 70%

c. 80%
d. 90%

A

b. 70%

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6
Q

The first indication of the presence of caries on enamel is:
a. Demineralization

b. Cavitation
c. Roughness
d. Discoloration

A

a. Demineralization

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7
Q

what is the most toxic form of mercury?
a. methyl and ethyl mercury
b. Mercury vapour

c. inorganic mercury forms
d. mercury sulphide

A

a. methyl and ethyl mercury

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8
Q

63 y/o px attended a gathering where one member had positive signs and symptoms of anosmia and myalgia with low grade fever. The patient was asked to be subjected to Antigen test which later showed a single line result so the patient was sent back home. What are the possible scenarios?

1.Test has low specificity and low sensitivity
2.Test has high specificity and low Sensitivity
3.Test has high specificity and high sensitivity
4. Test has low specificity and high Sensitivity
a. 1&4
b. 2&4
c. 1&3
d. 2&3

A

d. 2&3
2.Test has high specificity and low Sensitivity
3.Test has high specificity and high

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9
Q

Which of the following is the weakest phase of a set amalgam
a. Beta 2

b. Gamma
c. Gamma-1
d. Gamma-2
e. Beta-1

A

d. Gamma-2

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10
Q

All-in-one
a. Fourth generation

b. Fifth generation
c. Sixth generation
d. Seventh generation

A

d. Seventh generation

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11
Q

Which of the following is best indicated for direct filling gold?
a. Small class 2 lesion
b. Large class 3 lesion
c. Large class 2 lesion
d. Small cavitated class 3 lesion

A

a. Small class 2 lesion

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12
Q

Aluminum oxide is used to polish which of the following material?
a. Gold
b. Composite resin
c. Amalgam
d. Porcelain veneers

A

b. Composite resin

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13
Q

Total-etch technique
*
1/1
a. First generation
b. Second generation
c. Third generation
d. Fourth generation

A

d. Fourth generation

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14
Q

Death due to complications from pregnancy or childbirth

a. Crude birth rate
b. Crude pregnanch rate
c. Crude death rate

d. Infant mortality rate
e. Maternal mortality

A

e. Maternal mortality

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15
Q

Partial bevel in a cavity preparation means_____________
*
a. beveling including entire enamel wall but not dentin wall
b. beveling including enamel and dentin walls
c. beveling part of enamel and part of dentin wall
d. beveling part of enamel wall not exceeding 2/3 in dimension

A

d. beveling part of enamel wall not exceeding 2/3 in dimension

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16
Q

What is a sampling method where a subset of the population is selected in a way that each population member has an equal chance of being selected?
a. Multi stage
b. Cluster
c. Systematic
d. Simple Random

A

d. Simple Random

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17
Q

If you are to determine the Shrinkage property of Three Palfique Gen. Composites, which test is best used?
*
a. One-way Anova

b. Two-way Anova
c. Pearson Correlation
d. Student T Test

A

b. Two-way Anova

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18
Q

Compomer restorative materials are:
a. Glass Ionomer with polymer components

b. Resin systems with fluoride containing glasses
c. Composite resin for cervical restorations only

A

b. Resin systems with fluoride containing glasses

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19
Q

Which of the following chemically bond to the tooth:
a. Composite resin
b. Dental sealants
c. Glass ionomer

d. all of the above

A

c. Glass ionomer

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20
Q

It is the most common, simplest and classic type of graph
*
1/1
a. Bar graphs
b. Line graphs

c. Combo chart
d. Pie chart

A

b. Line graphs

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21
Q

When overdrying a cavity prep, which of the effects will it have on the dentin adhesive?
a. Decreases bond strength
b. Increases bond strength

c. Breaks down collagen in dentin

A

a. Decreases bond strength

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22
Q

A mathematical model that deals with the treatment of data and their analysis __________.
a. Statistics

b. Data
c. Research Study
d. Design

A

a. Statistics

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23
Q

For amalgam restorations, the most frequent complaint of pain right after placement is associated with:
a. Galvanism

b. Biting pressure
c. Heat
d. Cold

A

d. Cold

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24
Q

For what reason is epidemiology useful
a. It determines policy decisions
b. It establishes carriers of disease
c. It establishes income pattern
d. It determines population trends

A

d. It determines population trends

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25
Q

What are the steps in cleaning up mercury spill?
a. Isolate & Ventilate, Prepare to respond, Clean Up, Decontaminate, Contain
b. Isolate & Ventilate, Prepare to respond, Decontaminate, Contain, Clean Up
c. Isolate & Ventilate, Prepare to respond, Contain, Clean Up, Decontaminate

d. Isolate & Ventilate, Prepare to respond, Clean Up, Contain, Decontaminate

A

d. Isolate & Ventilate, Prepare to respond, Clean Up, Contain, Decontaminate

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26
Q

As the sample size decreases, standard deviation ______?
a. Decreases

b. Remains the same
c. May increase or decrease
d. Increase

A

d. Increase

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27
Q

Which of the following are examples of demographic data.
a. Social status, education, occupation
b. Family income, community resources
c. Age, sex, race ethnicity
d. Health, beliefs, customs

A

c. Age, sex, race ethnicity

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28
Q

Ranking the students starting from the individual with highest grade point average to the individual with the lowest grade point average is an example of a/an
a. Interval scale
b. Ratio scale
c. Nominal scale
d. Ordinal scale

A
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29
Q

Where are the dentist’s feet during any operative procedure when four-handed dentistry is being used?
a. On the stool support rim
b. On the floor

c. On the dental chair base
d. Wherever is convenient

A

b. On the floor

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30
Q

The effective fluoride concentration of APF (Acidulated Phosphate Fluoride) if professionally applied is
1a. 2.0%

b. 1.23%
c. 1.50%
d. 8.0%

A

b. 1.23%

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31
Q

Occlusal clearance for a porcelain fused to metal restoration should be about _____mm on the occlusal surface of a maxillary 1st premolar
a. 0.5
b. 1.0
c. 1.5

d. 2.0
e. 2.5

A

d. 2.0

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32
Q

Mercury intoxication in dental office mainly results from?
a. Direct contact with mercury
b. Ingestion of mercury
c. Mixing a mercury
d. Inhalation of mercury vapours

A

d. Inhalation of mercury vapours

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33
Q

As a general rule during pin placement, the depth must be around
a. 1mm
b. 2mm

c. 3mm
d. 4mm

A

b. 2mm

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34
Q

When is the best time to polish composite restoration
a. after 1 week
b. after 24 hours
c. immediately after

d. after a week

A

c. immediately after

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35
Q

All of the following are advantages of Indirect composite resin systems for veneers, except:
a. Increased flexural and tensile strength
b. Resistance to abrasion and fracture
c. Increased polymerization shrinkage

d. Improved color stability

A

c. Increased polymerization shrinkage

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36
Q

Resistance of handpiece to lateral forces?
a. Torque

b. Vibration
c. Amplitude
d. Heat production

A

a. Torque

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37
Q

All of the following constitutes an ideal cure, except:
a. incremental packing of materials up to 2mm maximal thickness
b. 20-40 seconds curing
c. Darker shades and thicker layers need less curing time

d. Keep distance from tip to material less than 6mm
e. Light must be kept at right angle to the material

A

c. Darker shades and thicker layers need less curing time

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38
Q

CPITN means ___________.
a. Community Periodontal Index and Treatment Needs
b. Community Periodontal Index of Treatment Needs
c. Community Periodontal Index with Treatment Needs

d. Community Periodontal Index for Treatment Needs

A

b. Community Periodontal Index of Treatment Needs

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39
Q

What is a sampling method used to study “Hidden population”?
a. Purposive

b. Snow ball
c. Accidental
d. Quota

A

b. Snow ball

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40
Q

The following are advantages of the use of sandwich technique, except:
a. It increases retention because the GIC bonds to the tooth structure and composite
b. Fluoride content of the GIC decreases the chance of recurrent caries
c. GIC under a composite restoration provides better seal because it bonds to the tooth structure
d. GIC creates mechanical retention in the tooth structure improving the retention of the restoration.

A

d. GIC creates mechanical retention in the tooth structure improving the retention of the restoration.

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41
Q

Material contraindicated as a base under resin restoration
a. Carboxylate cement
b. Calcium hydroxide
c. Zinc oxide eugenol

d. Zinc phosphate

A

c. Zinc oxide eugenol

42
Q

Comparing a composite restoration and an amalgam restoration in a class I cavity, composite is inferior to amalgam with respect to ________
a. Creep
b. Fracture
c. Occlusal wear

d. Marginal breakdown

A

c. Occlusal wear

43
Q

Optimal level of fluoride in drinking water:
a. 7-12ppm

b. 0.7-1.2ppm
c. 0.07-0.12ppm
d. 0.7-12ppm

A

b. 0.7-1.2ppm

44
Q

For what reason is epidemiology useful
a. It determines policy decisions
b. It establishes carriers of disease
c. It establishes income pattern
d. It determines population trends

A

d. It determines population trends

45
Q

Use of water spray during tooth preparation have the following advantages:
a. Dehydration of oral tissues
b. Tooth restorative material and other debris are carried away

c. Pulp is protected from heat
d. Clean view of cavity can be achieved

A

c. Pulp is protected from heat

46
Q

Harmony and unity among personel
a. Esprit de corps

b. Delegation
c. Line
d. Autonomy

A

a. Esprit de corps

47
Q

An arrested dentinal lesion that is typically “open” (allowing debridement from toothbrushing), with a dark and hard characteristic is known as
a. Eburnated dentin
b. Infected dentin
c. Arrested dentin

d. Turbid dentin

A

a. Eburnated dentin

48
Q

What is the blade length in mm of an instrument with a formula of 10-7-15?
a. 7.0
b. 1.5
c. 0.7
d. 10.0

A

a. 7.0

49
Q

GV Black concluded that the following areas on tooth surface are relatively non self-cleansable
a. Pits & Fissures

b. Tips & Cusps
c. Crests of marginal ridges
d. All inclined planes of cusps and ridges
e. Fossae

A

a. Pits & Fissures

50
Q

The proper zone of a gas air blowpipe flame used for melting casting gold alloys
a. Reducing zone
b. Oxidixing zone

c. Zone closed to nozzle
d. Combination of oxidizing & reducing zone

A

a. Reducing zone

51
Q

The dentist bevels the gingival margins of a gold onlay preparation. This process serves each of the following, except:

a. To minimize the need for gingival extension

b. To remove loose enamel rods
c. To facilitate finishing
d. To minimize marginal opening

A

a. To minimize the need for gingival extension

52
Q

Refers to a laminated restoration using glass ionomer to replace dentin & composite to replace enamel
a. Composite veneers
b. Labial veneers
c. Sandwich technique
d. Laminates

e. None of the above

A

c. Sandwich technique

53
Q

Which of the following is NOT a primary preventive measures provided by the community
a. School sealant program
b. Fluoride supplement program
c. Fluoride mouth rinsing program
d. Pit and fissure sealant application

A

d. Pit and fissure sealant application

54
Q

For a dental hand instrument with a formula 12-7-25, the number 25 stands for
a. Width of the blade in tenths of millimeter
b. Blade angle in centigrade

c. Primary cutting edge angle in centigrade
d. Blade length in millimeter

A

b. Blade angle in centigrade

55
Q

In what purpose are indices used?
a. To implement health education
b. To conduct intervention and treatment
c. To study insurance coverage
d. To compare oral health status or population

A

d. To compare oral health status or population

56
Q

Used to check bite in restoration
a. Articulating ribbon

b. Carbon paper
c. Bite wax

A

a. Articulating ribbon

57
Q

After the dentist has completed an etching procedure on a Class III composite preparation, then becomes contaminated with saliva. In response, the dentist should do which of the ff:

a. Blow away the saliva with air, then proceed
b. Rinse away the saliva with water, dry the preparation, then proceed
c. Wipe away the saliva with a cotton pellet, rinse the preparation with water, dry it with air, then proceed
d. Rinse away the saliva with water, dry the preparation with air, then repeat the etching procedure

A

d. Rinse away the saliva with water, dry the preparation with air, then repeat the etching procedure

58
Q

It is concerned in making estimates, predictions, generalizations and conclusions about the population based on information from a sample
a. Inferential statistics
b. Descriptive statistics
c. Inscriptive statistics
d. Differential statistics

A

a. Inferential statistics

59
Q

CAD/CAM means
a. Computer-aided design/computer-aided machine
b. Computer-assisted designing/computer-assisted manufacturing
c. Computer-assisted design/computer-assisted machine

d. Computer-aided design/computer-aided manufacturing

A

d. Computer-aided design/computer-aided manufacturing

60
Q

The first technical step to research is ____.
a. Consultation with a statistician
b. Identification of problem

c. Review of literature
d. Collection of data

A

b. Identification of pro

61
Q

Blade width of the hoe (6 1/2 - 2 ½ - 9)
a. 0.65 mm
b. 6 ½ mm

c. 2 ½ mm
d. 0.9 mm

A

a. 0.65 mm

62
Q

Which of the following inhibits the setting of Polymethyl methacrylate?
a. Zinc Phosphate cement
b. Zinc Polycarboxylate cement

c. Silicate cement
d. Zinc oxide eugenol cement

A

d. Zinc oxide eugenol cement

63
Q

What type of setting reaction is common to glass ionomer cements?
a. Polymerization

b. Acid-base reaction
c. Crystallization
d. All of the above

A

b. Acid-base reaction

64
Q

Arrangement of scores from the lowest to the highest is called a/an.
a. Range
b. Mean
c. Average
d. Array

A

d. Array

65
Q

In a class II preparation, this wall joins the facial wall where retention groove is placed
a. occlusal wall
b. axial wall

c. pulpal wall
d. mesial/distal wall

A

b. axial wall

66
Q

If you are to compare the effect of drug B3.90 before and after exposure, which type of analysis is best used?
a. Chi-Square Test

b. Dependent T-test
c. One-way
d. Spearman

A

b. Dependent T-test

67
Q

What is likely the explanation for a screening test which was used in the same way in two similar populations but the proportion of false positive results in population A is lower than in population B?
a. The specificity of the test is lower in population A
b. The prevalence of the disease is lower in population A

c. The prevalence of the disease is higher in population A
d. The specificity of the disease is higher in population A

A

d. The specificity of the disease is higher in population A

68
Q

Configuration factor (C-factor) means _________
a. the higher the C-factor, the lesser is the bond disruption
b. the lower the c-factor, the lesser is the bond disruption
c. the lower the c-factor, the greater is the bond disruption
d. the higher the c-factor, the greater is the bond disruption

A

d. the higher the c-factor, the greater is the bond disruption

69
Q

Which of the following is true about carbide burs?
a. More flutes mean it has more cutting efficiency

b. Less flutes mean it has more cutting efficiency
c. When using carbide burs, it must contact the tooth while the bur is rotating slowly.

A
70
Q

An adverse pulpal reaction is most likely to occur when which of the following materials is placed directly into a deep cavity preparation?
a. Silver amalgam
b. Zinc oxide eugenol

c. Polycarboxylate cement
d. Silicate cement
e. Zinc phosphate cement

A

d. Silicate cement

71
Q

the wedge is placed with its apex:
a. toward the gingiva
b. toward the incisal/occlusal

c. toward the mesial surface of prepared tooth
d. toward the distal surface of prepared tooth

A

b. toward the incisal/occlusal

72
Q

1 Bur is a type of

a. Round

b. End-cutting
c. Inverted
d. Round-end tapered

A

a. Round

73
Q

A preparation feature that increases retention and resistance form by creating a 0.8mm shoulder in the facial and/or lingual surface with a depth of 2 to 3mm.
a. Skirt preparation
b. Slot preparation

c. Collar preparation
d. Tunnel preparation

A

c. Collar preparation

74
Q

One of the following is not a measure of central tendency.
a. Mean
b. Median
c. Range
d. Mode

A

c. Range

75
Q

It is a scientific discipline concerned with the application method of problems in biology and medicine
a. Public health
b. Statistics
c. Biostatistics

d. Sampling

A

c. Biostatistics

76
Q

Selection of shade for composite is done:
a. Under light
b. After drying tooth
c. After isolation with rubber dam
d. None of the above

A

d. None of the above

76
Q

What does the square root of pq/n indicate?
a. Standard error of proportion

b. Standard error of mean
c. Standard error of difference of mean
d. Standard error of difference in proportion

A

a. Standard error of proportion

77
Q

When considering the number of pins to use, which of the following need/s to be considered?
a. One pin per missing axial line angle is placed
b. The more pins used, the more retentive it will be
c. The more pins used, the greater the risk of dentin crazing
d. A and B only
e. A, B and C

A

e. A, B and C

78
Q

After application of cavity varnish, ______ evaporates leaving a thin layer of resin in the walls of the preparation
a. Alcohol

b. Eugenol
c. Ether
d. Water

A

c. Ether

79
Q

How should the margins of a dental amalgam restoration be trimmed
a. By carving along the margins with a sharp instrument that rests on the tooth surface

b. By carving from the restoration to the tooth with a sharp instrument
c. By carving from the tooth to the restoration with a sharp instrument

A

a. By carving along the margins with a sharp instrument that rests on the tooth surface

80
Q

A commonly used acid solution for etching enamel in conjunction with composite resin restorations is:
a. 50% phosphoric acid
b. 50% sulfuric acid
c. 75% phosphoric acid

d. 50% silicophosphoric acid
e. 75% hydrofluoric acid

A

a. 50% phosphoric acid

81
Q

The TMS or Thread-Mate system has four sizes of pins, which is not included?
a. Regular

b. Minikin
c. Minin
d. Minuta

A

c. Minin

82
Q

In aesthetic dentistry, colour of the tooth is:
a. Hue
b. Chroma

c. Value
d. Translucency
e. Prismatic effects

A

a. Hue

83
Q

A normal distribution curve depends on the _______.
a. Mean and standard deviation

b. Mean and median
c. Mean and sample size
d. Range and sample size

A

a. Mean and standard deviation

84
Q

COTE of amalgam is 4x the COTE of tooth and 2x the COTE of composite
a. First statement is true. Second statement is false
b. First statement is false. Second statement is true
c. Both statements are true

d. Both statements are false

A

d. Both statements are false

85
Q

This type of sampling involves randomly selecting some of the pre-existing natural group.
a. Sample random
b. Systematic
c. Quota
d. Cluster

A

d. Cluster

86
Q

A type of conservative preparation for amalgam and composite restorations in which the occlusal lesion and proximal lesion is joined with the marginal ridge remaining intact and not involved during the preparation.
a. Skirt preparation
b. Slot preparation
c. Collar preparation
d. Tunnel preparation

A

d. Tunnel preparation

87
Q

This is the main responsibility of a Public health Dentist?
a. To conduct oral health surveys
b. To give lectures on Maternal Care
c. To provide primary prevention

d. To limit disability

A

a. To conduct oral health surveys

88
Q

In 1986 Chernobyl disaster shock the Soviet Union and the world as it is then and until this moment the worst disaster of nuclear power to date. Which Epidemiological study can best represent and analyze the workers who in the event?
a. Case-Control

b. Ecology
c. Cohort
d. Cross-sectional

A

c. Cohort

89
Q

The typical polymerization shrinkage of resin composite is:
a. 2-3 %
b. 4-5 %

c. 6-7 %
d. 8-9 %

A

a. 2-3 %

90
Q

Which of the following conditions must be met for a valid student “T” test between means of two groups
a. Standard deviation must be approximately the same

b. Number of observations must be the same
c. Mean should be approximately the same
d. Sample must be small

A
91
Q

The smear layer is an important consideration in _______________________

a. bevel placement
b. establishing the outline form
c. dentin bonding

d. the formation of recurrent caries

A

c. dentin bonding

92
Q

Mode or modal is the _______
a. Greater value
b. Insignificant value
c. Lesser value
d. Common value occurring frequently

A

d. Common value occurring frequently

93
Q

Prevalence of disease refers to_______.
a. Rate

b. Ratio
c. Proportion
d. Deviation

A
94
Q

Which of the following cannot be used as a base?
a. Zinc phosphate
b. Zinc oxide eugenol

c. GI
d. Calcium hydroxide

A

d. Calcium hydroxide

95
Q

Who proposed DMFT?
a. Klein Dwyer
b. Brown Massler
c. Cheyne and Dwyer
d. Klein and Palmer

A

d. Klein and Palmer

96
Q

A preparation feature where the proximal surface is extended far more facially or lingually that improves retention and resistance form. This is recommended if there is a need for alteration of proximal contact and when splinting posterior teeth with onlays.
a. Skirt preparation

b. Slot preparation
c. Collar preparation
d. Tunnel preparation

A

a. Skirt preparation

97
Q

A type of preparation for composite class II cases where the access is obtained from a faciolingual direction resulting to marginal ridge preservation.
a. Skirt preparation
b. Slot preparation
c. Collar preparation
d. Tunnel preparation

A

b. Slot preparation

98
Q

Excessive exposure of the eyes to light-curing machines will cause damage mainly to
a. Lens
b. Cornea

c. Cones and rods
d. Iris

A

c. Cones and rods

99
Q

For a patient with gingival recession, the best technique of wedging is:

a. piggy-back wedging
b. double wedging

c. wedge wedging
d. single wedging

A

a. piggy-back wedging

,.MBD (9 decks)

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