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ABO Part 1 > 123 Questions > Flashcards

123 Questions Flashcards

1
Q

What is true about light and chemical cured?

A

There is no significant difference in failure rates of visible and chemical cured

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2
Q

T/F
- 1mm anterior slide is okay
- 1 mm lateral slide is okay

A
  • True
  • False
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3
Q

What does not change when cranial base steepens?

A

FMA

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4
Q

What is not an indication for early treatment?

A

Consolidate anterior spacing

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5
Q

What is not associated with hyperdivergent anterior open bite?

A

Long mandibular corpus length

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6
Q

True/False
- If a patient has TMD, IVRO is a good choice.
- Rigid splinting recommended.

A
  • True
  • False - IVRO requires intermaxillary fixation
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7
Q

Are TMD and long term condyle problems an issue with mandibular mid-symphyseal distraction osteogenesis?

A

No

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8
Q

What can help prevent labially impacted canines?

A

RME, HG, and EXT of primary canines

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9
Q

What is the best indicator of impacted canine?

A

Absence of canine bulge at age 9-11

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10
Q

What is true of the effect of forces on root resorption?

A

Heavy forces cause more root resorption than light forces

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11
Q

What is the primary reason for external apical root resorption?

A

Prior history of root resorption

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12
Q

Patient is hyperdivergent anterior open bite with maxillary excess. Best way to treat?

A

TADs to intrude molars

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13
Q

What has sutural growth (intramembranous), replacement of cartilage (endochondral), and resorption/apposition?

A

MMOST - Mandible, Malleus, Occipital, Sphenoid, Temporal?

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14
Q

What is not true about palatally impacted canines?

A

Most likely due to primary canines being extracted early

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15
Q

What percentage of flush terminal plane goes to Class II?

A

45% goes to class II, 55% to Class I

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16
Q

What is not an effect of opioid abuse?

A

Pupil dilation - They get pupil constriction

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17
Q

True/False
- Parenteral bisphosphonates decrease OTM and prevent relapse
- Work by binding to hydroxyapatite

A
  • True
  • True
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18
Q

Where does CN7 exit?

A

Stylomastoid foramen

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19
Q

What is true about human growth hormone?

A

Mandible grows more than maxilla, but both grow

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20
Q

Effects of Herbst?

A
  • Distalize max molars
  • Distal tipping max molars
  • Mesial movement of mandibular molars
  • NOT decrease occlusal plane (STEEPENS)
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21
Q

CL/P have hard time with speech because…

A

CL/P have velopharyngeal insufficiency, causing hypernasality

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22
Q

What does increasing OP to SN do?

A

Decrease Wits - Wits gets more negative as you rotate the occlusal plane CW

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23
Q

What are indications of closed lock?

A
  • No joint sounds
  • Limited opening
  • Pain when forced open
  • NOT no deviation during opening - closed lock has deviation to ipsilateral side on opening
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24
Q

What is true when placing Maryland Bridge?

A

Best perpendicular to occlusal plane

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25
Q

What to do to maintain ridge in missing U2 cases?

A

Let canine erupt into U2 spot then distalize later

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26
Q

How much space to leave for U2 buildup?

A

Leave 2/3 distal and 1/3 mesial

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27
Q

What do you NOT do for canine sub?

A

Adjust distal marginal ridge

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28
Q

What is not diagnostic criteria for canine sub?

A

Height of central incisors

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29
Q

What do you not find in hyalinized areas?

A

Osteoclasts

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30
Q

True/False
- Ratio of SS is 18% chromium, 8% nickel
- SS has low modulus of elasticity

A
  • True
  • False
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31
Q

What doesn’t cause black triangles?

A

Root convergence

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32
Q

What is TAD success?

A

Vector amount, vector direction, bone quality

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33
Q

What is most important factor for primary stability?

A

Cortical bone thickness

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34
Q

True/False
- CBCT is best for the smallest FOV possible
- Radiation affects all patients the same

A
  • True
  • False
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35
Q

CBCT accuracy depends on…

A

Voxel size

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36
Q

CBCT 0.4mm voxel size is good for?

A

Neither bone height nor thickness

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37
Q

Does intrusion lead to more support of the root?

A

No

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38
Q

What is the standard of care?

A

Court rulings

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39
Q

What is used to assess the potential for long term effects that might occur in the future?

A

Effective dose

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40
Q

What is used to assess how much biological damage is expected from the absorbed dose?

A

Equivalent dose

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41
Q

What is used to assess the potential for biochemical changes in specific tissues?

A

Absorbed dose

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42
Q

What is the effect of deviation angle (play or slop in wire in bracket) on torque?

A

DOES affect torque

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43
Q

What causes translation?

A

Capsular

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44
Q

1mm proclination is how many degrees?

A

3 degrees?

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45
Q

What is the main effect of lip bumper?

A

Proclination of incisors

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46
Q

What do you NOT do for external invasive cervical root resorption?

A

Monitor annually

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47
Q

Which archform is least common?

A

Square

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48
Q

Limitation of SARPE?

A

Coronoid process

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49
Q

What is not an etiology of TMD?

A

Posture

50
Q

T/F Occlusal adjustments are not recommended for TMD?

A

True

51
Q

What is best for patient with perio problems?

A

Clear aligners

52
Q

What is most radiation when imaging TMJ?

A

Tech99

53
Q

What is best imaging for DJD?

A

CBCT

54
Q

True/False
- Less than 5mm is best for papilla
- Greater than 6mm, 77% have papilla

A
  • True
  • False (56%)
55
Q

MARA vs Herbst?

A
  • MARA does not procline lower incisors more than Herbst
  • MARA had greater increase in long term mandibular length (1mm/year) vs Herbst
  • Herbst had the greatest maxillary restriction
  • MARA decreases SNA and SNB
  • Both steepen occlusal plane and decrease Wits
56
Q

What are the effects of the Twin Block?

A
  • Dental and skeletal
  • Cap incisors to prevent proclination?
57
Q

True/False
- You must use Pano before IPR
- Distal has more enamel than mesial of tooth

A
  • False - Periapical
  • True
58
Q

Elastics are made of….

A

Polyurethane

59
Q

Main bacteria in juvenile periodontitis

A

AA

60
Q

What is not seen in Fibrous Dysplasia (but is seen in Pagets)?

A

Pre-malignant transformation

61
Q

What is not true of class II div II?

A

More common in women
(More common in men?)

62
Q

What does NOT innervate the tongue?

A

IA nerve

63
Q

Where to put hands for kids for CPR?

A

Lower half of sternum

64
Q

How many compressions for CPR?

A

100 beats/min

65
Q

What is not true of OKC?

A

Most common in posterior maxilla
(Most common in posterior MANDIBLE)

66
Q

Bone loss in perio is due to…

A

Reduction in osteoblasts

67
Q

What imaging is best for disc perforation?

A

Arthrography

68
Q

Percent of kids with condyle fracture and normal growth?

A

75%

69
Q

What did Edward Angle not invent?

A

Labiolingual
(PEER - pin/tube, e-arch, edgewise, ribbon arch)

70
Q

What forms premaxilla and primary palate?

A

Medial nasal process

71
Q

Which disease is most easily transmissible?

A

Hep C

72
Q

What does not happen in transition for primary to permanent?

A

Max canines move distally into primate space
(MESIALLY)

73
Q

What does Forsus not effect?

A

SNB

74
Q

CL/P formation in which stage?

A

4

75
Q

Which sinuses do not help in breathing?

A

Paranasal sinuses

76
Q

What percent of Class II is due to mandibular retrognathia?

A

75%

77
Q

_________ is for when you want to predict a continuous dependent variable from a number of independent variables.

A

Regression

78
Q

How does the chin remodel?

A

Deposition on external of lingual cortex

79
Q

What are the features of Aperts?

A

SAM - syndactyl, autosomal dominant, mental retardation

80
Q

What has Wormian bones?

A

CHARPOD
Cleidocranial dysplasia, hypothyroid, hypophosphatase, Apert’s, Rickett’s, Pyncnodysostosis, osteogenesis imperfecta, downs

81
Q

True/False
- DI 1/8000
- Affects only permanent

A
  • True
  • False
82
Q

T/F
Crouzons fuse at 7-8

A

False

83
Q

How long is RAP effect?

A

4 months

84
Q

True/False
- Condylar growth more than sum of mad molar growth
- Mand plane increase with growth

A
  • True
  • False - decreases with growth
85
Q

Worst wire for torqueing?

A

A-NiTi

86
Q

Force for protraction facemask?

A

450g below OP?

87
Q

Pt opens, gets stuck to left, hears pop, able to close

A

Posterior disc displacement on left

88
Q

True/False
- SARPE more stable than 3 piece
- Down fracture needed for SARPE

A
  • True
  • False
89
Q

What to use for heat sensitive?

A

Vaporized H2O2

90
Q

Muscles that don’t elevate hyoid

A

Omohyoid

91
Q

Features of Lichen Planus?

A

open sores, autoimmune, wickham’s striae, graft vs host disease

92
Q

Most rapid somatic growth?

A

Conception to birth

93
Q

T/F
- 60% of saliva comes from parotid

A

False (20%)

94
Q

Not true of archform

A

Mandible based on maxilla

95
Q

Not a primary growth site

A

Synostosis

96
Q

True/False
- Early treatment of skeletal open bite in early mixed dentition is indicated
- It is the period that will result in most skeletal changes

A
  • True
  • True
97
Q

True/False
- Important to start facemask in early mixed dentition
- In order to maximize skeletal changes

A
  • True
  • True
98
Q

Not affected in RPE

A

Premaxilla

99
Q

Stress same but strain increases

A

Phase transformation

100
Q

How much space for lateral implant compared to central incisor?

A

75%?

101
Q

Puberty?

A

Hypothalamus

102
Q

PDL fibers are….

A

Inelastic

103
Q

Excessive vertical nasomaxillary growth leads to…

A

Mand retrognathia

104
Q

Bone responsible for complex growth of orbit?

A

Lacrimal

105
Q

What is not used in smiling?

A

Procerus & Orbicularis oris

106
Q

Most anterior inferior point max alveolus?

A

Prosthion

107
Q

Bjork all but in an average growing patient

A

Deposition of bone on inferior surface of ramus, below the angle

108
Q

True/False
- 91% is normal for Bolton for 6-6
- 77% is normal for Bolton 3-3

A
  • True
  • True
109
Q

First thing to do when you see unilateral xbite but no shift clinically detected

A

Flat splint

110
Q

Functional matrix?

A

Soft tissue

111
Q

Is CBCT fan shaped?

A

No, CT?

112
Q

Phase transformation from A to M NiTi is…

A

Thermally induced

113
Q

Best way to treat 1 wall defect

A

Extrude and occlusal equilibrate

114
Q

TPA for AP anchorage?

A

No

115
Q

Decrease voxel size?

A

More photons for better image quality
Higher quality, more radiation

116
Q

During nonworking, which cusp inclines are most likely involved

A

Buccal inclines of mandibular cusps

117
Q

True/False
3mm implant adjacent to natural tooth will cause papilla formation problems

A

False

118
Q

Less than 1mm implant to natural tooth. What will happen?

A

Inadequate papilla will form

119
Q

What type of bone forms right after or beginning of ortho?

A

Woven bone

120
Q

HPHG - line of action above center or resistance

A

Distal root tipping

121
Q

Asymmetric HG

A

Place longer outer bow on Class II side

122
Q

Does mandible follow maxillary archform ?

A

No

ABO Part 1 (14 decks)

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