_____ are attached to hooks or buttons that are secured on the
band or brackets.
A. Springs
B. Tooth positioners
C. Elastic separators
D. Elastics Correct Answer D. Elastics
_____ separators are placed between contacts with a "sawing" or
flossing motion.
A. Brass wire
B. Elastomeric
C. Steel spring
D. Wedge Correct Answer B. Elastomeric
______ polishing refers to polishing root surfaces that have been
exposed during periodontal surgery.
A. Root
B. Apical
C. Therapeutic
D. Coronal Correct Answer C. Therapeutic
A _____ is a point of support that works as a lever for
movement.
A. fulcrum
B. pen grasp
C. handpiece
D. mouth prop Correct Answer A. fulcrum
,A right-handed operator generally begins seated at the ____
o'clock position, and a left-handed operator begins seated at the
_____ o'clock position.
A. 8; 3
B. 11; 1
C. 10; 2
D. Seating can be in any position in which the operator is
comfortable. Correct Answer A. 8; 3
A stain that is dull and yellowish-brown in color is caused by:
A. cigarettes or cigars.
B. inadequate toothpaste or poor hygiene.
C. tetracycline.
D. all of the above. Correct Answer B. inadequate toothpaste or
poor hygiene.
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 Correct Answer D. tooth; bracket
Alginate impressions must be poured within _____ so that
distortion does not occur.
A. 5 minutes
B. 30 minutes
C. 1 hour
D. 24 hours Correct Answer C. 1 hour
,Alginate material that is not setting or setting too rapidly can be
the result of which factor?
A. Expired shelf life
B. Humidity
C. Improper storage
D. All of the above Correct Answer D. All of the above
Although technique may vary, when assisting a dentist in taking
an elastomeric impression, mix the light-bodied material first.
True
False Correct Answer True
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. Correct Answer
C. Maxillary and mandibular anterior teeth do not touch.
An impression is a positive reproduction of teeth and
surrounding oral tissues. The model created from the impression
is a negative reproduction of the structures.
A. Both statements are correct.
B. Neither statement is correct.
C. The first statement is correct; the second statement is
incorrect.
D. The first statement is incorrect; the second statement is
correct. Correct Answer B. Neither statement is correct.
, An impression tray should be sufficiently deep to allow _____
mm of material between the tray and the incisal or occlusal
edges of the teeth.
A. 0.5 to 1
B. 2 to 3
C. 4 to 5
D. 6 to 7 Correct Answer B. 2 to 3
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. Correct Answer B. Separate the teeth
before banding.
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 Correct Answer A. nickel titanium
Before placement of _______, separators may be necessary.
A. arch wires
B. bands
C. bonded brackets
D. ligatures Correct Answer B. bands
Black stain:
A. has no relationship to poor oral hygiene.
B. is rare.
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