Deck 60: Orthodontics

Question 1

What is the purpose of an orthodontic positioner?

A)To move the teeth
B)To retain the teeth in their desired position
C)To reposition the teeth during orthodontic treatment
D)To act as a permanent retainer

Answer 1

To retain the teeth in their desired position

Question 2

What is class II occlusion?

A)It is normal occlusion.
B)It is mesioclusion.
C)It occurs when the mesiobuccal cusp of the maxillary first molar occludes in the interdental space between the mandibular second premolar and the mesial cusp of the mandibular first molar
D)It occurs when the mesiobuccal cusp of the maxillary first molar occludes in the interdental space between the distal cusp of the mandibular first permanent molar and the mesial cusp of the mandibular second permanent molar

Answer 2

It occurs when the mesiobuccal cusp of the maxillary first molar occludes in the interdental space between the mandibular second premolar and the mesial cusp of the mandibular first molar

Question 3

What information is needed for the diagnosis and treatment planning of an orthodontic case?

A)Medical and dental histories
B)Photographs and radiographs
C)Diagnostic models
D)All of the above

Answer 3

All of the above

Question 4

What is the purpose of the arch wire?

A)It is a pattern that gives the dental arch its shape.
B)It holds interarch elastics.
C)It bonds directly to the teeth.
D)It stabilizes the ends of a facebow.

Question 5

The orthodontic problems of most people result from interactions of which of the following?

A)Developmental influences
B)Genetic influences
C)Environmental influences
D)All of the above

Question 6

In orthodontics,which radiograph is taken to study and make measurements of the skull and analyze growth patterns?

A)Panoramic
B)Cephalometric
C)Bite-wing
D)Occlusal

Question 7

Which statement is incorrect pertaining to dental assistant duties in an orthodontic practice?

A)The dental assistant motivates and reinforces oral home care.
B)The dental assistant makes a diagnosis.
C)The dental assistant makes appliance adjustments.
D)The dental assistant takes and fabricates diagnostic records.

Question 8

Orthodontic fixed appliances are also known as what?

A)Braces
B)Separators
C)Hawley retainers
D)Clear "aligners"

Question 9

What is an advantage of using the patient's model to select bands?

A)The patient does not need to be present.
B)It is more accurate.
C)Neither are advantages.
D)Both are advantages.

Question 10

When taking photographs,the full direct view includes what?

A)Extraoral frontal view, with the lips in a relaxed position
B)Intraoral view, with all teeth in occlusion
C)Extraoral profile view of the patient's right side, with the lips in a relaxed position
D)Intraoral right buccal view, with the distal of the canine to the distal of the last molar

Question 11

Which of the following is used to tie the arch wire into orthodontic brackets?

A)Separating wire
B)Wire ligatures
C)Elastomeric ligatures
D)Both b and c

Question 12

Severe malocclusion and dental facial deformities,both of which can cause social stigma and have a negative effect on a patient's self-esteem,are examples of which type of adversity?

A)Psychosocial function
B)Oral function
C)Dental disease
D)Both a and c

Question 13

What is the most common type of attachment for fixed appliances?

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

Question 14

What is the purpose of the headgear tube?

A)It is placed on the upper first molar bands.
B)It stabilizes the ends of the facebow.
C)It assists with retention of the arch wire.
D)Both a and b are purposes.

Question 15

Which radiograph is most commonly exposed on an orthodontic patient?

A)FMX
B)Panoramic
C)Cephalometric
D)Bite-wing

Question 16

Which statement is incorrect about sticky candy and gum use during orthodontic treatment?

A)It weakens cement beneath bands, causing bands to loosen.
B)It loosens bands, pulls out ligature ties, and bends arch wires.
C)It lodges between bands and beneath arch wires, causing irritation to gum tissues.
D)It can increase the chance of carious lesions.

Question 17

On which teeth are brackets most commonly bonded?

A)Anterior teeth
B)Premolars
C)Molars
D)Both a and b

Question 18

What does a hook do?

A)It attaches a bracket to a tooth.
B)It holds interarch elastics.
C)It stabilizes the ends of a facebow.
D)It holds the arch wire in place.

Question 19

During the frontal evaluation of facial esthetics,why is the face examined?

A)To determine whether the jaws are proportionately positioned
B)To evaluate lip protrusion
C)To examine for bilateral symmetry
D)To evaluate the vertical facial proportions and the mandibular angle

Question 20

What holds dental arch wires in place?

A)Ligature ties
B)Dental cement
C)Elastomeric ties
D)Both a and c

Question 21

Which statement is incorrect regarding the cut ligature pigtail?

A)Tuck toward the gingival.
B)Tuck toward the occlusal.
C)Run a finger over then to check for comfort.
D)Tuck them in the interproximal space.

Question 22

In class _____ occlusion,or distoclusion,the mandibular arch and the body of the mandible are in bilateral,distal relationship to the maxillary teeth.

A)I
B)II
C)III
D)IV

Question 23

Which of the following is used to close space between teeth?

A)Elastomeric ligatures
B)Elastic chains
C)Comfort tubing
D)Wire ties

Question 24

Which step is first in preparation for bonding the brackets to the teeth?

A)Isolate using cotton rolls or retractors.
B)Polish using a fluoride free paste.
C)Etch, rinse, and dry.
D)None of the above is correct.

Question 25

Buccal arch wire tubes are located on which bands?

A)Maxillary first molar
B)Mandibular premolar
C)Maxillary central incisors
D)Mandibular canines

Question 26

_____ separators are placed between contacts with a "sawing" or flossing motion.

A)Brass wire
B)Elastomeric
C)Steel spring
D)Wedge

Question 27

What instrument is used to disengage wire ties when removing an arch wire?

A)Ligature cutter
B)Mosquito hemostat
C)Explorer
D)Howe pliers

Question 28

In ______,the mesiobuccal cusp of the maxillary permanent first molar occludes in the interdental space between the distal cusp of the mandibular first second premolar.

A)distoclusion
B)labioversion
C)linguoversion
D)mesioclusion

Question 29

During cementation of bands,where is the cement placed?

A)Into the tubes
B)On the tooth
C)Outer surface of the band
D)Inner surface of the band

Question 30

After preparing the tooth for bonding brackets,the sealant is placed on the ____ and the bonding material on the _____.

A)bracket; bracket
B)tooth; tooth
C)bracket; tooth
D)tooth; bracket

Question 31

Arch wires that are made of _____ are useful in early stages of treatment because they are flexible.

A)nickel titanium
B)stainless steel
C)beta titanium
D)Opti-Flex

Question 32

An anterior open bite refers to which condition?

A)There are no posterior teeth.
B)There are spaces between teeth in the same arch.
C)Maxillary and mandibular anterior teeth do not touch.
D)The teeth contact only during mastication.

Question 33

What is overjet?

A)Horizontal distance between maxillary and mandibular teeth
B)Coronal length of maxillary anterior teeth
C)Vertical overlap of maxillary and mandibular anterior teeth
D)Labioversion of the mandibular teeth

Question 34

Which type of arch wire would not be used to position the crown and root of the teeth in final stages of treatment?

A)Round
B)Square
C)Rectangular
D)All of the above

Question 35

Which of the following is incorrect about customized aligners?

A)They consist of a series of aligners designed by computer technology.
B)Each aligner is worn for about 2 weeks.
C)They can be used for all types of orthodontic treatment.
D)They are referred to as invisible braces.

Question 36

The arch wire that is used as a "working arch wire" is:

A)nickel titanium.
B)stainless steel.
C)beta titanium.
D)Opti-Flex.

Question 37

Before placement of _______,separators may be necessary.

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

Question 38

Wire ligatures should be twisted and cut,leaving a _____-mm pigtail.

A)1- to 2
B)2- to 3
C)3- to 4
D)4- to 5

Question 39

Which instrument removes elastomeric ligature ties?

A)Bird-beak pliers
B)A spoon excavator
C)A hemostat
D)An orthodontic scaler

Question 40

Which instrument is used in the placement of elastomeric ligature ties?

A)Locking hemostat
B)Pigtail explorer
C)Scaler
D)Ligature-tying pliers

Question 41

The orthodontic problems of most people come from an interaction of which of the following? (Select all that apply.)

A)Developmental
B)Genetic
C)Environmental
D)Functional influences

Question 42

Elastic separators can be left in the mouth for ____ days,and steel can be left in the mouth for _____ days.

A)7; 7
B)14; 5
C)5; 14
D)14; 14

Question 43

Which foods should be avoided by patients with fixed appliances?

A)Chewing gum
B)Sticky foods
C)Popcorn
D)All of the above

Question 44

Which condition occurs when the mandible is located ahead of the maxilla?

A)Overbite
B)Underbite
C)Retrusion
D)Centric relation

Question 45

Which instrument contours a bound around the tooth to allow for minimal exposed cement at the margins?

A)Band seater
B)Band pusher
C)Bird-beak pliers
D)Band-removing pliers

Question 46

Which statement is incorrect about preparing a band for cementation?

A)Wipe attachments with wax or Chapstick.
B)Place the band occlusal surface down on masking tape.
C)Place the band gingival surface down on masking tape.
D)Fill the entire inner surface with cement.

Question 47

Which non-nutritive habit may be a result in narrowing of the maxilla?

A)Bruxism
B)Tongue thrusting
C)Mouth breathing
D)All of the above

Question 48

_____ are attached to hooks or buttons that are secured on the band or brackets.

A)Springs
B)Tooth positioners
C)Elastic separators
D)Elastics

Question 49

How is a patient instructed to clean under the arch wire?

A)Use an interproximal brush.
B)Use a floss threader.
C)Use a Waterpik.
D)All of the above are correct.

Question 50

Which of the following is used to place elastic separators?

A)Hemostat
B)Dental floss
C)Elastic separating pliers
D)Either b or c

Question 51

An orthodontic tooth positioner is not used for which purpose?

A)Retain teeth in position.
B)Separate the teeth before banding.
C)Massage tissue.
D)Use prior to a retainer.

Question 52

What attachment is either welded to bands or attached to a backing pad that is bonded directly to the teeth?

A)Bracket
B)Separator
C)Retainer
D)Coil spring

Question 53

Why is glass ionomer cement the most commonly used cement for banding orthodontic bands?

A)It contains fluoride that aids in preventing decay under the bands.
B)It has adequate strength to aid in retention with enamel.
C)It is capable of being bonded to the tooth surface.
D)Both a and b are correct.

Question 54

Which of the following can occur if a patient practices poor oral hygiene during orthodontic treatment?

A)Hypocalcification
B)Rampant decay..
C)Rampant decay
D)All of the above

Question 55

Which instrument is used in the placement of arch wires?

A)Band seater
B)Ligature director
C)Bird-beak pliers
D)Weingart utility plier

Question 56

The function of the _____ is to apply force to either move the teeth or hold them in the desired positions.

A)buccal tubes
B)bracket
C)arch wire
D)wire tie