Orthodontic Assistant Practice
Exam and answers
Orthodontics is the dental specialty that deals with - Ans>>the growth and development of
the jaws and face
The condition in which the mandible is located ahead of the maxilla is called -
Ans>>prognathism
The best way to motivate adolescents toward good oral hygiene habits is by - Ans>>relating
to social acceptance and appearance
Removal of bands may be accomplished with - Ans>>anterior band slitting pliers
A headgear appliance is worn - Ans>>as the orthodontist prescribes
A positioner is worn - Ans>>after the removal of fixed appliances
In placing TP springs, an important consideration is - Ans>>to place them from the lingual
surface
The instrument of choice in ligating an archwire is a - Ans>>ligature-tying pliers
Direct bracket bonding is advantage because the procedure - Ans>>allows the dentist less
clinical chair time
The attachment either welded or soldered to the bands that secure the archwire is the -
Ans>>bracket
Brass separators are removed by - Ans>>cutting opposite the pigtail with ligature cutters
What instrument is used to place elastic separators? - Ans>>Elastic separating pliers
The patient should be instructed to clean his or her retainer - Ans>>after each meal
Cephalometry is - Ans>>taking measurements of the skull
Cephalometric tracings are made over - Ans>>extraoral radiographs
The cephalometric headplate taken most often is the - Ans>>lateral skull headplate
An open bite refers to a condition wherein - Ans>>the anterior teeth do not contact
Overjet is the - Ans>>horizontal distance between maxillary and mandibular teeth
A type of measuring device commonly used to take intraoral measurments is a (an) -
Ans>>flexible millimeter ruler
When seating and sizing bands using a band pusher type of instrument, it is necessary to
maintain control by - Ans>>establishing a stable fulcrum before applying pressure
Class III malocclusion is - Ans>>a protruded position of the mandible in relation to the
maxilla
Vertical overbite refers to the - Ans>>vertical overlap of the incisal edges of maxillary and
mandibular anterior teeth
, Class II maloclussion is - Ans>>retruded position of the mandible in relation to the maxilla
The head-stabilizing device used in cephalometrics is called a (an) - Ans>>cephalostat
During cementation of bands, the cement is placed - Ans>>on all surfaces within the band
The attachment of anterior plastic brackets directly to teeth can be accomplished by -
Ans>>acid etch bonding
Cervical anchorage (headgear) is an - Ans>>appliance that exerts distal forces on maxillary
teeth
After active orthodontic treatment is finished , what appliance is used to stabilize the teeth?
- Ans>>A retainer
When determining the length of a preformed archwire, you measure the distance from -
Ans>>first molar to first molar
In the removal of an archwire - Ans>>ligature ties, then the archwire, are removed one side
at a time from the buccal tube
The most common type of removable retainer is a - Ans>>Hawley retainer
What is used to tie the archwire onto orthodontic brackets? - Ans>>Ligature wire
When removing separators, care must be taken to - Ans>>avoid injuring the interdental
papillae
A useful instrument for removing elastic separators is - Ans>>a sickle scaler
A TP spring is a type of - Ans>>Separator
An elastic separator is placed by - Ans>>stretching and pushing through the contacts
When placing an archwire, one should - Ans>>insert the wire into one side of the buccal
tubes, then guide it into the brackets
The importance of the ligature wire is that it - Ans>>holds the archwire in place
When ligating with a tie wire, the tie wire should be - Ans>>bent at a 45-degree angle
Select the instrument used to check for loose bands - Ans>>Howe pliers
After cutting brass wire separators, the pigtails are cut to - Ans>>2-3 mm
What instrument is used to cut ligature ties in the removal of an archwire? - Ans>>Pin and
ligature cutters
When placing headgear - Ans>>insert one side of facebow first, then the other
The type of appliance that has cemented bands and lingual or labial archwires is referred to
as - Ans>>a fixed appliance
If an orthodontic elastic separator has been swallowed or has disappeared, the assistant
should - Ans>>look for the elastic separator in the oral cavity and inform the dentist if it is
not located in the oral cavity
To check for loose bands - Ans>>use the Howe pliers in an occlusal and gingival direction to
see if the band moves
Exam and answers
Orthodontics is the dental specialty that deals with - Ans>>the growth and development of
the jaws and face
The condition in which the mandible is located ahead of the maxilla is called -
Ans>>prognathism
The best way to motivate adolescents toward good oral hygiene habits is by - Ans>>relating
to social acceptance and appearance
Removal of bands may be accomplished with - Ans>>anterior band slitting pliers
A headgear appliance is worn - Ans>>as the orthodontist prescribes
A positioner is worn - Ans>>after the removal of fixed appliances
In placing TP springs, an important consideration is - Ans>>to place them from the lingual
surface
The instrument of choice in ligating an archwire is a - Ans>>ligature-tying pliers
Direct bracket bonding is advantage because the procedure - Ans>>allows the dentist less
clinical chair time
The attachment either welded or soldered to the bands that secure the archwire is the -
Ans>>bracket
Brass separators are removed by - Ans>>cutting opposite the pigtail with ligature cutters
What instrument is used to place elastic separators? - Ans>>Elastic separating pliers
The patient should be instructed to clean his or her retainer - Ans>>after each meal
Cephalometry is - Ans>>taking measurements of the skull
Cephalometric tracings are made over - Ans>>extraoral radiographs
The cephalometric headplate taken most often is the - Ans>>lateral skull headplate
An open bite refers to a condition wherein - Ans>>the anterior teeth do not contact
Overjet is the - Ans>>horizontal distance between maxillary and mandibular teeth
A type of measuring device commonly used to take intraoral measurments is a (an) -
Ans>>flexible millimeter ruler
When seating and sizing bands using a band pusher type of instrument, it is necessary to
maintain control by - Ans>>establishing a stable fulcrum before applying pressure
Class III malocclusion is - Ans>>a protruded position of the mandible in relation to the
maxilla
Vertical overbite refers to the - Ans>>vertical overlap of the incisal edges of maxillary and
mandibular anterior teeth
, Class II maloclussion is - Ans>>retruded position of the mandible in relation to the maxilla
The head-stabilizing device used in cephalometrics is called a (an) - Ans>>cephalostat
During cementation of bands, the cement is placed - Ans>>on all surfaces within the band
The attachment of anterior plastic brackets directly to teeth can be accomplished by -
Ans>>acid etch bonding
Cervical anchorage (headgear) is an - Ans>>appliance that exerts distal forces on maxillary
teeth
After active orthodontic treatment is finished , what appliance is used to stabilize the teeth?
- Ans>>A retainer
When determining the length of a preformed archwire, you measure the distance from -
Ans>>first molar to first molar
In the removal of an archwire - Ans>>ligature ties, then the archwire, are removed one side
at a time from the buccal tube
The most common type of removable retainer is a - Ans>>Hawley retainer
What is used to tie the archwire onto orthodontic brackets? - Ans>>Ligature wire
When removing separators, care must be taken to - Ans>>avoid injuring the interdental
papillae
A useful instrument for removing elastic separators is - Ans>>a sickle scaler
A TP spring is a type of - Ans>>Separator
An elastic separator is placed by - Ans>>stretching and pushing through the contacts
When placing an archwire, one should - Ans>>insert the wire into one side of the buccal
tubes, then guide it into the brackets
The importance of the ligature wire is that it - Ans>>holds the archwire in place
When ligating with a tie wire, the tie wire should be - Ans>>bent at a 45-degree angle
Select the instrument used to check for loose bands - Ans>>Howe pliers
After cutting brass wire separators, the pigtails are cut to - Ans>>2-3 mm
What instrument is used to cut ligature ties in the removal of an archwire? - Ans>>Pin and
ligature cutters
When placing headgear - Ans>>insert one side of facebow first, then the other
The type of appliance that has cemented bands and lingual or labial archwires is referred to
as - Ans>>a fixed appliance
If an orthodontic elastic separator has been swallowed or has disappeared, the assistant
should - Ans>>look for the elastic separator in the oral cavity and inform the dentist if it is
not located in the oral cavity
To check for loose bands - Ans>>use the Howe pliers in an occlusal and gingival direction to
see if the band moves
