Deck 28: Orthodontics

Question 1

An abnormal horizontal distance between the labial surface of mandibular anterior teeth and the lingual surface of maxillary teeth is an ____________.

A) open bite
B) overjet
C) underjet
D) overbite

Answer 1

overjet

Question 2

Malocclusion caused from systemic diseases that interrupted the normal schedule of dental development are considered __________ factors.

A) genetic
B) systemic
C) local
D) none of the above

Answer 2

systemic

Question 3

Malocclusion caused from congenitally missing teeth or facial clefts are considered __________ factors.

A) genetic
B) systemic
C) local
D) none of the above

Answer 3

genetic

Question 4

When a tooth extends above the normal line of occlusion, it is in ____________.

A) supraversion
B) transversion
C) torsoversion
D) distoversion

Question 5

The type of orthodontics that involves improving problems is ____________.

A) preventive
B) interceptive
C) corrective
D) none of the above

Question 6

Most orthodontic offices are designed in an "open bay" type design.

Question 7

The most common method of classifying occlusion types is the __________ system.

A) angle
B) ADA
C) universal
D) none of the above

Question 8

When a tooth is rotated or turned, it is in ____________.

A) intraversion
B) torsoversion
C) distoversion
D) labioversion

Question 9

The malposition in which the maxillary posterior teeth are lingual to the mandibular teeth is __________ bite.

A) edge-to-edge
B) end-to-end
C) open
D) cross

Question 10

The dental assistant must be careful to pass the cement-filled bands in the order of sequence of placement.

Question 11

Malocclusion caused from such habits as mouth breathing, bruxism, and nail-biting are considered __________ factors.

A) genetic
B) systemic
C) local
D) none of the above

Question 12

The failure of the maxillary and mandibular to occlude is a(n) __________ bite.

A) edge-to-edge
B) end-to-end
C) cross
D) open

Question 13

In normal occlusion, all are considered true statements EXCEPT the ____________.

A) maxillary anterior teeth overlap the incisal edge of the mandibular anterior teeth by 2 mm
B) maxillary posterior teeth are one cusp buccal to the mandibular posterior teeth
C) mandibular teeth are in maximal contact with the maxillary teeth
D) distal buccal cusp of the maxillary first molar occludes in the buccal groove of the mandibular first molar

Question 14

Polishing paste containing fluoride is used to polish teeth prior to placement of brackets on the tooth surface.

Question 15

When the vertical overlap is greater than normal, this is considered an ____________.

A) open bite
B) overjet
C) underjet
D) overbite

Question 16

When a tooth is in the wrong order in the arch, it is in ____________.

A) supraversion
B) transversion
C) torsoversion
D) distoversion

Question 17

Flossing the mouth with fixed appliances in place is not necessary.

Question 18

The purpose of a space maintainer is to maintain space.

Question 19

Three-dimensional technologies have allowed orthodontic treatment without the need for plaster model casts and hand bending of wires.

Question 20

Orthodontics is a specialty that serves patients for __________ reasons.

A) functional
B) esthetic
C) both a and b
D) neither a nor b

Question 21

A Hawley appliance is an example of a(n) ____________.

A) activator
B) retainer
C) tooth positioner
D) lingual archwire

Question 22

What is used to provide force for movement and is used between the maxillary and mandibular arches?

A) Archwire
B) Ligature wires
C) Elastics
D) Headgear

Question 23

The specialized bone cells that build new bone are ____________.

A) osteoclasts
B) osteoblasts
C) odontoblasts
D) odontoclasts

Question 24

What is used to widen the maxillary arch?

A) Activator
B) Retainer
C) Tooth positioner
D) Lingual archwire

Question 25

Which appliance is used to keep the teeth in position after the braces have been removed?

A) Activator
B) Retainer
C) Tooth positioner
D) Lingual archwire

Question 26

What is used to attach the archwire to the brackets?

A) Ligature wire
B) Plastic rings
C) O-rings
D) All of the above

Question 27

The teeth are retained in position through the process of ____________.

A) resorption
B) deposition
C) both a and b
D) neither a nor b

Question 28

The teeth are allowed to be moved through the process of ____________.

A) resorption
B) deposition
C) both a and b
D) neither a nor b

Question 29

Which type of radiograph is used to make tracings to determine the relationship of certain landmarks?

A) Bitewing
B) Panorex
C) Occlusal
D) Cephalometric

Question 30

Buccal tubes are welded onto the ____________.

A) anterior brackets
B) molar bands
C) premolar bands
D) all of the above

Question 31

Archwires fit into the ____________.

A) brackets bonded to the anterior teeth
B) brackets secured to the bands
C) buccal tubes secured to the bands
D) all of the above

Question 32

Redeposited bone takes how long to reossify?

A) 6 weeks
B) 2 months
C) 4 months
D) 9 months

Question 33

The movement of the teeth is accomplished by the ____________.

A) archwire
B) brackets
C) bands
D) both b and c

Question 34

Another name for lingual braces is ____________.

A) invisible braces
B) stainless steel braces
C) ceramic brackets
D) none of the above

Question 35

The specialized bone cells that cause bone to break down are

A) Osteoclasts
B) Osteoblasts
C) Odontoblasts
D) Odontoclasts

Question 36

Brackets for anterior teeth are held in place with ____________.

A) bonding agents
B) glass ionomer cements
C) ZOE cements
D) none of the above

Question 37

Tooth movement depends on the __________ of the force.

A) magnitude
B) direction
C) distribution
D) all of the above

Question 38

The cementing of bands is usually done with ____________.

A) resin cements
B) glass ionomer cements
C) ZOE cements
D) none of the above

Question 39

Headgear is used with a ____________.

A) bite block
B) buccal tube
C) facebow
D) none of the above

Question 40

During the consultation, which of the following is discussed?

A) Cost of treatment
B) Patient's responsibility
C) Duration of treatment
D) All of the above

Question 41

To make a retainer for a patient, what must be done first?

A) "After" photographs
B) Alginate impressions
C) Both a and b
D) Neither a nor b

Question 42

The twisted ends of the ligature wire is cut to ______ mm.

A) 1 to 2
B) 3 to 4
C) 5 to 6
D) It does not matter to what length they are cut.

Question 43

Bands are selected and sized by placing the bands ____________.

A) directly on the patient's tooth
B) on the patient's study models
C) either a or b
D) Bands are available in universal sizes, so no sizing is needed.

Question 44

Which instrument is used to tie ligature wire and/or place elastic ligatures?

A) Coons pliers
B) Ligature director
C) Mathieu
D) Ligature wire cutter

Question 45

The orthodontist takes radiographs as part of the diagnosis procedure. The cephalometric films are taken to determine the course of treatment. The cephalometric is taken to assist in the evaluation of the ____________.

A) growth patterns of the dentition and the surrounding area
B) patient's head and face growth
C) jaw and expected growth
D) teeth
E) all of the above

Question 46

What is the name given to an appliance that improves an overbite by encouraging lower jaw growth?

A) Bionator
B) Herbst
C) Frankel
D) Damon

Question 47

Which instrument pushes the band into place?

A) Band seater
B) Band driver
C) Bite stick
D) None of the above

Question 48

Which instrument cuts the distal ends of the archwire?

A) Bird-beak pliers
B) Distal-end cutters
C) Three-prong pliers
D) None of the above

Question 49

Which instrument is used to manipulate ligature wire?

A) Coons pliers
B) Ligature director
C) Howe pliers
D) Ligature wire cutters

Question 50

Which instrument uses force from the patient's bite to seat bands?

A) Band seater
B) Band driver
C) Bite stick
D) None of the above

Question 51

The invisible aligners provide a method of tooth straightening without traditional braces. With the average case, the number of "aligners" in a series could be ________ aligners per case.

A) 1 to 8
B) 10 to 30
C) under 5
D) none of the above

Question 52

Elastic ties are removed with ____________.

A) fingers
B) a scaler
C) ligature wire cutters
D) none of the above