1. A9diastema9is9a9space9between9two9teeth9in9the9same9arch.9When9this9occurs9between9the
9maxillary9central9incisors,9it9is9often9the9result9of9a9pronounced9labial9frenum.
a. Both9statements9are9true.
b. The9first9statement9is9true;9the9second9statement9is9false.
c. The9first9statement9is9false;9the9second9statement9is9true.
d. Both9statements9are9false.
ANSWER:9 A
A9space,9or9lack9of9contact9area,9between9any9two9teeth9in9the9same9arch9is9called9a9diastema.9
When9a9diastema9occurs9between9the9maxillary9central9incisors,9it9is9often9the9result9of9a9pron
ounced9labial9frenum9extending9to9the9crest9of9the9alveolar9ridge9and9possibly9over9the9ridge.9
This9band9of9firm9connective9tissue9causes9the9erupting9incisors9to9be9pushed9aside9resulting9i
n9a9diastema,9or9space.9Correction9of9a9diastema9usually9involves9surgical9removal,9or9cutting,
9of9the9frenal9tissue9between9teeth.
3. Contraction9of9which9muscle9raises9the9tongue9upward?
a. Mylohyoid
b. Palatopharyngeal
c. Palatoglossal
d. Levator9glossal
ANSWER:9 A
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