Orthodontic Assistant Practice Exam Latest Update Questions and Correct Answers
A finished Hawley retainer may have - Correct Answer: an acrylic palate,
a labial wire, arrow clasps
A headgear appliance is worn - Correct Answer: as the orthodontist prescribes
A positioner is worn - Correct Answer: after the removal of fixed appliances
A TP spring is a type of - Correct Answer: Separator
A type of measuring device commonly used to take intraoral measurments is a (an) -
Correct Answer: flexible millimeter ruler
A useful instrument for removing elastic separators is - Correct Answer: a sickle scaler
A water irrigator is used - Correct Answer: to remove loose food debris
According to the manufacturer, regular preventative maintenance for the model trimmer
includes all of the following EXCEPT - Correct Answer: replacing rag wheels
After active orthodontic treatment is finished , what appliance is used to stabilize the
teeth? - Correct Answer: A retainer
After cutting brass wire separators, the pigtails are cut to - Correct Answer: 2-3 mm
After removal of the orthodontics bands, all excess cement should be removed
because - Correct Answer: gingival irritation may occur,
teeth will not occlude properly, teeth may appear discolored, cement is irritating to the interproximal surfaces of teeth
An elastic separator is placed by - Correct Answer: stretching and pushing through the contacts
An important function of the dental assistant in an orthodontic practice is to - Correct
Answer: motivate and reinforce oral hygiene home care
An OA assistant is placing brackets noticed one of them slides off the position, what
should they do? - Correct Answer: Ask the orthodontist to reposition it
An open bite refers to a condition wherein - Correct Answer: the anterior teeth do not contact
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Before cementation - Correct Answer: brackets are waxed,
bands are arranged in cementation order, teeth are isolated and dried, teeth are coronal polished
Brass separators are removed by - Correct Answer: cutting opposite the pigtail with ligature cutters
Cephalometric tracings are made over - Correct Answer: extraoral radiographs
Cephalometry is - Correct Answer: taking measurements of the skull
Cervical anchorage (headgear) is an - Correct Answer: appliance that exerts distal forces on maxillary teeth
Class II maloclussion is - Correct Answer: retruded position of the mandible in relation to the maxilla
Class III malocclusion is - Correct Answer: a protruded position of the mandible in relation to the maxilla
Direct bracket bonding is advantage because the procedure - Correct Answer: allows the dentist less clinical chair time
During cementation of bands, the cement is placed - Correct Answer: on all surfaces within the band
Gypsum materials used for orthodontic procedures are best stored in a - Correct
Answer: air tight dry container
If a wire is used to intrude tooth #8 and the bracket is placed upside down, what effect will this cause on tooth #8?
Intrude
Extrude
Rotate - Correct Answer: extrude
If an archwire does not go in - Correct Answer: check for a crushed bracket,
the molar band tube is blocked, check width and diameter of archwire
If an orthodontic elastic separator has been swallowed or has disappeared, the assistant should - Correct Answer: look for the elastic separator in the oral cavity and inform the dentist if it is not located in the oral cavity
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