Deck 28: Orthodontics

Question 1

Which opens tight interproximal contacts?

A) Orthodontic band
B) Bonded bracket
C) Arch wire
D) Separator

Answer 1

Separator

Question 2

Malocclusion is:

A) tooth contact when biting and chewing
B) the presence of primary teeth in a permanent dentition
C) an abnormal relationship of the maxillary teeth to the mandibular teeth when occluded
D) the habitual occlusion or bite of opposing teeth when the mandible is in centric relation

Answer 2

an abnormal relationship of the maxillary teeth to the mandibular teeth when occluded

Question 3

Orthodontic band removal is accomplished with specialized:

A) tweezers
B) pluggers
C) cutters
D) pliers

Answer 3

pliers

Question 4

Each step, EXCEPT one, prepares a tooth for bracket bonding. Which is the EXCEPTION?

A) Etch, rinse, and dry the tooth.
B) Polish the tooth with pumice slurry.
C) Isolate the tooth using cotton rolls or retractors.
D) Brush the tooth with a thin layer of sodium fluoride.

Question 5

After preparing the tooth for bonding brackets, a liquid sealant is applied:

A) to the back of the bracket
B) to the prepared tooth surface
C) with the orthodontic scaler
D) with the bracket placement tweezers

Question 6

Elastomeric ring separators can be left in place for up to:

A) 5 days
B) 7 days
C) 2 weeks
D) 4 weeks

Question 7

Which is NOT a diagnostic record?

A) Photograph
B) Radiograph
C) Dental cast
D) Patient interview

Question 8

Orthodontic fixed appliances are also known as:

A) braces
B) separators
C) retainers
D) aligners

Question 9

The orthodontist measures dentofacial proportions from which radiograph?

A) Full-mouth survey
B) Panoramic
C) Cephalometric
D) Bite-wing

Question 10

Which instrument is used to sever ligature ties when removing an arch wire?

A) Ligature cutter
B) Ligature director
C) Distal end cutter
D) Bird-beak pliers

Question 11

The orthodontic hemostat is used to:

A) twist a ligature tie around a bracket
B) cut the ligature wire
C) contour or bend the arch wire
D) remove elastomeric rings

Question 12

Which food is LEAST likely to break or weaken a fixed appliance?

A) Ice
B) Pasta
C) Popcorn
D) Chewing gum

Question 13

Angle's classification is based on the relative position of which permanent teeth?

A) Central incisors
B) First molars
C) Second molars
D) First premolars

Question 14

A headgear appliance:

A) controls growth
B) is composed of three parts
C) moves the maxillary first molar mesially
D) levies intraoral pressure to achieve desired treatment results

Question 15

Elastics are commonly referred to as:

A) springs
B) rubber bands
C) Os
D) tubes

Question 16

Dental arch wires are NOT held in place with:

A) wire ligatures
B) dental cement
C) elastomeric ties
D) continuous wire ties

Question 17

The use of orthodontic separators may be necessary before placing:

A) arch wires
B) bands
C) bonded brackets
D) ligatures

Question 18

Before seating an orthodontic band, cement is placed on the:

A) brackets
B) tooth
C) outer surface of the band
D) inner surface of the band

Question 19

An orthodontic positioner is designed to:

A) move the teeth
B) retain the teeth in their desired position
C) reposition the teeth during orthodontic treatment
D) move and reposition the teeth during orthodontic treatment

Question 20

Which is NOT used to seat a mandibular band?

A) Firm finger pressure
B) Band pusher
C) Patient's biting force
D) Bite stick

Question 21

Each customized aligner (e.g., Invisalign) tray is worn for:

A) 1 week
B) 2 weeks
C) 1 month
D) 2 months

Question 22

Match each angle classification with its correct arch relationship.

MB of the maxillary first molar occludes distal to the MB groove of the lower first molar; maxillary centrals are retruded and lateral incisors are tipped

A)Class I
B)Class II, division 1
C)Class II, division 2
D)Class III
E)Normal occlusion

Question 23

Match each angle classification with its correct arch relationship.

MB of the maxillary first molar occludes mesial to the MB groove of the lower first molar

A)Class I
B)Class II, division 1
C)Class II, division 2
D)Class III
E)Normal occlusion

Question 24

Match each angle classification with its correct arch relationship.

MB of the maxillary first molar occludes with the MB cusp of the lower first molar

A)Class I
B)Class II, division 1
C)Class II, division 2
D)Class III
E)Normal occlusion

Question 25

How many photographs are taken for the diagnostic record?

A) Two
B) Three
C) Four
D) Five

Question 26

In a profile examination, the orthodontist examines the face in profile to determine whether the jaws are proportionately positioned, to evaluate lip protrusion, and to evaluate the vertical and facial proportions.

Question 27

When seating a mandibular molar band, the band pusher is placed along the buccal margin and the patient's biting force is used to drive the band into place.

Question 28

Indications for orthodontic treatment include psychosocial influences, oral function, and dental disease.

Question 29

The main purpose of the orthodontic clinical examination is to give the patient the cost of treatment and evaluate the patient's oral hygiene before placing braces.

Question 30

Space maintainers are a function of which type of orthodontic treatment?

A) Preventive
B) Limited
C) Interceptive
D) Comprehensive

Question 31

Correction of an open bite is an example of limited orthodontic treatment.

Question 32

After debanding, residual cement is easily removed with a/an:

A) abrasion strip
B) prophy cup and pumice slurry
C) ultrasonic scaler
D) soft toothbrush and firm pressure

Question 33

Thumb sucking is permissible before the permanent teeth are in position because retained primary teeth force permanent teeth to erupt out of alignment.

A) Both the statement and the reason are correct and related.
B) Both the statement and the reason are correct but not related.
C) The statement is correct, but the reason is not.
D) The statement is not correct, but the reason is correct.

Question 34

A serial extraction of primary or permanent teeth is performed only when more conservative methods of treatment will not be effective.

Question 35

Giving the patient the cost estimate is part of the case presentation.

Question 36

Match each angle classification with its correct arch relationship.

MB cusp of the maxillary first molar occludes with the MB groove of the mandibular first molar

A)Class I
B)Class II, division 1
C)Class II, division 2
D)Class III
E)Normal occlusion

Question 37

Through the use of fixed appliances, a tooth can be moved in four directions.

Question 38

The two main methods of separation are steel separating springs and elastomeric separators.

Question 39

Match each angle classification with its correct arch relationship.

Mesiobuccal (MB) of the maxillary first molar occludes distal to the MB groove of the lower first molar, and maxillary anteriors protrude

A)Class I
B)Class II, division 1
C)Class II, division 2
D)Class III
E)Normal occlusion

Question 40

Orthodontic cement should be mixed thicker than the cement for an inlay or a crown.

Question 41

The arch wire serves as a pattern for changing the dental arch.

Question 42

The most commonly used bracket is the edge-wise bracket.

Question 43

A positioner is an orthodontic appliance cemented in place to hold space for the eruption of a permanent tooth.