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.DENTAL BOARD EXAM REVIEWER > 36. Restorative Dentistry > Flashcards

36. Restorative Dentistry Flashcards

1
Q

Tetralogy of denta caries

A

Diet - high sucrose diet
Host - tooth
Microorg
Time - frequency(more impt) and duration

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2
Q

Triad of thumbsucking

A

Duration(most impt) - 6hrs
Frequency - am/pm
Intensity - 1 room away

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3
Q

Microorg in enamel caries

A

Strep mutans

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4
Q

Dentin caries

A

Lactobacillus acidophilus or casei

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5
Q

Microorg in root or cemental caries

A

Actinomyces viscosus

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6
Q

1st bacteria to colonize oral cavity (24hrs*) (or 10-12hrs)

Most numerous in oral cavity

A

Strep salivarius

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7
Q

First to colonize plaque

24-48hrs after toothbrushing

A

Strep sanguis

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8
Q

BQ: best technique for caries examination?

A

Visual examination

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9
Q

BQ: What is the adhesive used by microorg to stick to the tooth?

A

Dextran

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10
Q

BQ: What is the sugar that prevents glucose from binding to cariogenic microorganism?

A

Xylitol

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11
Q

Is caries smaller or larger in radiograph?

A

Smaller

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12
Q

Saliva prevents caries by

A

Remineralization
Acts as a buffer for acids
Use proteins, enzymes, antibodies that kill microorg
Wash food away

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13
Q

Normal ph of saliva

A

6.2-7.0 (weak acid)

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14
Q

Critical pH = dental caries

A

5.5

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15
Q

If pH in saliva is lower that 5.5

A

Erosion

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16
Q

Ig in saliva

A

IgA

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17
Q

Stretchy property of saliva

A

Spinnbarkeit test

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18
Q

BQ: Relationship of the 2 triangles in Pits and Fissure caries in the DEJ

A

Base to base relationship in the DEJ

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19
Q

BQ: Relationship of 2 triangles in smooth surface caries in the DEJ

A

Apex to base / Base to apex

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20
Q

BQ: BEST preventive measure for Pits and Fissure caries

A

PFS

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21
Q

BQ: Best preventive measure for SMOOTH SURFACE CARIES

A

Fluoride

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22
Q

BQ: Most sensitive part of the tooth during cavity prep

A

DEJ

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23
Q

Theory about tooth sensitivity

A

Hydrodynamic theory

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24
Q

BQ: most common site of proximal caries

A

Between contact area and gingiva

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25
Q

Shape or form of the conventional preparation that RESISTS DISPLACEMENT or removal of restoration

A

Retention form

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26
Q

Prevents FRACTURE of tooth and resto matl; withstand masticatory forces

A

Resistance form

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27
Q

Adequate observation, accessibility, ease of operation

A

Convenience form

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28
Q

Primary retention form of Class 1 prep

A

Converging Bu and Li occ = 90

Or “diverging apically”

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29
Q

Wall outside the preparation

A

Cavosurface

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30
Q

Resistance form of Class 1 prep (2)

A

PARALLEL or (diverging) Mesial and Distal walls

+ Flat pulpal floor

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31
Q

Shape of enamel rods/enamel prism

A

Key hole

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32
Q

BQ: Depth in pit (class 1)

A

1.5mm - 2mm

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33
Q

BQ: Depth in DENTIN (Class 1)

A

0.2mm*

Or to 0.5mm

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34
Q

Preparation/isthmus width (1/3) is for what form

A

Convenience form

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35
Q

BQ: After cavity prep, proper outline form is made and there are still carious lesions, what is the next thing to do?

A

Extend outline form

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36
Q

BQ: During occ cavity prep, which permanent teeth is mostly subjected to accidental pulp exposure?

A

Mn 1st premolar 🐍

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37
Q

BQ: APLA is bevelled or rounded?

A

APLA : Bevelled

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38
Q

Bu, Li, and Gingival walls in Class 2 proximal prep should be extended into the EMBRASURES (“spillways”) because:

A

For prevention of secondary caries

Self cleansing

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39
Q

Minimum clearance during Class II prep

A

0.5mm

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40
Q

BQ: Depth of Retentive features

A

1/2 the size of a 1/4 round bur

0.25mm

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41
Q

Retentive features of Class 2 prep are placed in:

A

Axiofacial LA

Axiolingual LA

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42
Q

Bu and Li walls
Gold:
Am:

A

Bu and Li walls
Gold: diverge occ (LAPJOINT)
Am: converge occ (BUTT JOINT)

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43
Q

MD walls
Gold:
Am:

A

MD walls
Gold: parallel occ
Am: parallel occ

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44
Q

Depth into dentin
Gold:
Am:

A

Depth into dentin
Gold: 0.2mm
Am: 0.2mm

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45
Q

Internal line angles
Gold:
Am:

A

Internal line angles
Gold: sharp (convenience)
Am: rounded (resistance)

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46
Q

Reverse bevel in Class II gold inlay is placed in the

A

Axiogingival LA

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47
Q

Occ and Prox CSM Bevel
Gold:
Am:

A

Occ CSM
Gold: 40 degree
Am: 90 degree

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48
Q

Gingival CSM of Gold

A

30 degree

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49
Q

Counterbevel of Onlay

A

30 degrees

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50
Q

Gingival CSM in Class II Am
Perm:
Deciduous:

A

Gingival CSM in Class II Am
Perm: 15-20 bevel
Deciduous: no bevel!

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51
Q

BQ: Best resto matl for Distolingual surface of Canines

A

Gold

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52
Q

BQ: Best approach in preparing class III caries?

A

Lingual approach

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53
Q

BQ: When preparing carious tooth adjacent to each other, which one is prepared first and which one is restored first?

A

Prepare: larger first (for convenience)
Restore: smaller first

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54
Q

BQ: Best rx to assess proximal caries

A

Bitewing

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55
Q

Retentive features of Class III prep are placed in

A

Gingivoaxial and incisoaxial LA

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56
Q

Class IV
Line angle:
Point angle:

A

Class IV
Line angle: 11
Point angle: 6

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57
Q

BQ: Axial wall of Class V prep

A. Convex
B. Concave
C. Flat

A

Convex

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58
Q

Walls that Follows contour of the surface of the tooth in CLASS V prep

A

Axial wall

59
Q

Class VI:incisal edge of ant/cusp of post is named by

A

SIMON

60
Q

BQ: Caries below the restoration

A. Recurrent caries
B. Secondary caries

A

RECURRENT caries

61
Q

Caries that progressed just into the DEJ

A

Frank caries

62
Q

Caries assoc with aging

A

Root surface caries / Senile caries

63
Q

✨ Root surface caries is due to:

A

GINGIVAL RESORPTION

DECREASE CORONAL CARIES

64
Q

BQ: What is the radiolucency found just below the cej on the root due to ANATOMICAL VARIATION or GAP between enamel and bone covering the root

A

Cervical burnout

65
Q

BQ: Tx for cervical burnout

A

No tx

66
Q

BQ: Zone of carious enamel (except)

“Trained Dentists=Better Salary”

A

Translucent zone
Dark zone
Body zone
Surface zone

67
Q

Zone of carious dentin: no bacteria present

A

Normal dentin

68
Q

Zone of carious dentin: Subtransparent + Transparent dentin

A

Affected dentin

69
Q

Dry leathery texture

No need to remove bec it Can remineralize

A

Affected dentin

70
Q

“Zone of bacterial invasion”

A

Turbid dentin

71
Q

Outermost carious zone
Soft mushy texture
Removed during cavity prep

A

Infected dentin

72
Q

Substantia adamantina

A

Enamel

73
Q

Substantia ebornea

A

Dentin

74
Q

Substantia ossea

A

Cementum

75
Q

BQ: Which component is similar to bone?

A. Enamel
B. Dentin
C. Cementum

A

Cementum

76
Q

BQ: Grasslike/ Fan shaped/ Bush of hypomineralized enamel extending from dej

A

Enamel tufts

77
Q

Hypomineralized enamel but not radiating

A

Enamel lamellae

78
Q

Odontoblastic processes extending into the enamel in the DEJ

A

Enamel spindle

79
Q

BQ: Caries progress faster in enamel or dentin?

A

Dentin

80
Q

BQ: Dead odontoblasts with Empty tubules are known as

A

Dead tracts

81
Q

BQ: Bleaching affects enamel only, dentin only or both?

A

BOTH

82
Q

“Time dependent” dimensional change

A

Creep

83
Q

Components of Amalgam that both:
⬇️ Working time and creep
⬆️ Expansion
⬆️ Strength

A

Silver (Ag) and Copper (Cu)

84
Q

Corrosion byproduct of Amalgam

A

Tin sulfite

85
Q

Reaction of metal due to exposure in the environment

A

Corrosion

86
Q

⬇️ Corrosion

A

Copper (Cu)

87
Q

⬆️ working time and creep
⬆️ Expansion
⬇️strength

(Must be minimal!!)

A

Mercury (Hg)

88
Q

BQ: Mercury-alloy ratio

A

1:1

Pag wala sa choices: 8:5

89
Q

⬆️⬆️⬆️ Expansion of amalgam when contaminated with moisture

A

Zinc

90
Q

Adv of Zinc

A

Prevents oxidation

Scavenger for oxides

91
Q

BQ: Which amalgam alloy needs the most amount of mercury?

A

Irregular

92
Q

BQ: Which amalgam alloy needs the least amount of mercury

A

Spherical

93
Q

Strongest phase of am
Corrodes least
SILVER + TIN

A

Gamma phase

94
Q

Phase: Silver + Mercury

A

Gamma One phase

95
Q

Weakest phase; Corrodes most

Tin + Mercury

A

Gamma Two phase

96
Q

Low copper amalgam = % of copper?

A

<6% or <10% copper

97
Q

Eliminates gamma two phase rxn

>9-30% copper or 10%-30% copper

A

High copper amalgam

98
Q

“Contraction” or “expansion” of a material

A

Dimensional change

99
Q

BQ: Corrosion byproducts of amalgam has what advantage?

A

Tin sulfite = improves SEAL; Prevents secondary caries

100
Q

BQ: Setting of amalgam : what process

A

Crystallization process

101
Q

BQ: Setting time of amalgam

A

24hrs

102
Q

BQ: Used to polish Am

A

Tin oxide

103
Q

BQ: Used to polish Composite

A

Aluminum oxide

104
Q

BQ: Used to polish GOLD

A

Iron oxide

105
Q

Ideal resto for HIGH CARIES RATE

A

Amalgam

106
Q

Ideal resto for PERIO

A

Gold

107
Q

Ideal resto for ESTHETICS

A

Adults: co
Pedo: GI

108
Q

Amalgam discoloration on GINGIVA

A

Amalgam tattoo

109
Q

Amalgam discoloration on TOOTH

A

Amalgam blues

110
Q

BQ: Which of the ffg is true about mulling?

A

CONTINUATION OF TRITURATION PROCESS

111
Q

BQ: Which do you prefer, Overtriturated or Undertriturated amalgam?

A

Overtriturated

112
Q

BQ: What is the procedure in which the amalgam is rubbed using the first finger and the thumb?

A

Mulling

113
Q

BQ: Most common cause of amalgam chipping during carving

A

Carving after setting

114
Q

BQ: When there is ditching of am resto, when is it indicated for replacement?

A

If ditch is >0.5mm

115
Q

BQ: During amalgam carving, you can prevent ditching by;

A

Resting the sharp instrument on the cusp while carving

116
Q

Distance from the margin of the mesial and distal wall to the prox surface must not be less than:

Pm =
Molars =

A

Premolars: 1.6mm
Molars: 2mm

117
Q

BQ: Most difficult tooth to adapt a matrix band

A

Mx 1st PM (mesial developmental depression)

118
Q

BQ: Why is the matrix band extended occ when restoring class II cavities?

A

For overfilling

119
Q

BQ: Reasons for using WEDGE

A

Boards: to make the band taut (tight)

  • prevent overhang
  • for sep of tooth
120
Q

Working end of Non cutting instrument

A

Nib

121
Q

Four unit formula (W-A-L-A)

A
  1. Blade width (/10)
  2. Cutting edge Angle
  3. Blade length
  4. Blade angle
122
Q

THREE UNIT FORMULA (W-L-A)

A
  1. Blade width
  2. Blade length
  3. Blade angle
123
Q

BQ: Omitted in 3 unit formula because it is immed 90 degrees or “perpendicular to the blade”

A

Cutting edge angle

124
Q

Modification of enamel hatchet

A

GMT

125
Q

Process of Setting of composites

A

Polymerization

126
Q

Most common filler of composites

A

Colloidal silica

127
Q

Fluid content of composites

A

Matrix

128
Q

Most common matrix

A

BIS-GMA

bisphenol-A glycidyl methacrylate

129
Q

Bis-gma is introduced by

A

Bowen 1962

130
Q

Binds filler to matrix

A

Coupling agent

131
Q

Most common coupling agent

A

Silane

132
Q

Darker shade/ ⬆️chroma (A 3.5) needs LESS or MORE curing time?

A

More curing time

133
Q

BQ: Proper way to apply light cure

A

From afar then gradually go nearer

134
Q

Are used to produce Radiopacity of Composite which serves as contrast for secondary caries

A

Barium, Zinc, boron, zirconium, yttrium

135
Q

BQ: what inhibits polymerization

A 
Cavity varnish (short term)
Eugenol
136
Q

BQ: greatest disadv of polymerization

A

Shrinkage

137
Q

Ratio of bonded surfaces to the unbound surfaces

A

Configuration factor

138
Q

⬆️ highest configuration factor : ⬆️ Shrinkage

A

Class 1 and 5

139
Q

Introduced etching or conditioning

A

Buonocore 1955

140
Q

Most common etchant

A

37% phosphoric acid for 15s (enamel)

141
Q

Most impt fnx of etchant

A

Reduces microleakage

142
Q

BQ: After etching, tooth becomes contaminated with saliva, what to do?

A

Re etch

143
Q

Retention of composites is by

A

Micromechanical retention

144
Q

BQ: All of the ffg are fxns of etchants EXCEPT:

A

Improves esthetics

.DENTAL BOARD EXAM REVIEWER (38 decks)

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