Chapter 9 Test Test Answers

question

the crown & the root; anatomical crown and root join here
answer

the cervical line divides what?
question

tooth morphology
answer

what is the study of the structure and form of teeth?
question

32 teeth
answer

how many teeth are in the adult dentition?
question

6-12 years
answer

what is the period of mixed dentition?
question

furcation
answer

what is the dividing point of a multi-rooted tooth?
question

oblique ridge
answer

what is the elevated area of enamel that extends obliquely across the tooth?
question

maxillary laterals
answer

which teeth are sometimes congenitally missing?
question

canines
answer

which teeth are often called the “cornerstone of the mouth”?
question

maxillary first premolar
answer

which premolar is often considered for removal during orthodontic treatment?
question

mandibular first premolar
answer

which tooth has nonfunctioning lingual cusps?
question

second molar
answer

which tooth appears to have four equally sized cusps?
question

wisdom teeth or third molar
answer

which teeth in the permanent dentition are farthest from midline?
question

fissure
answer

what is a developmental groove where decay often initiates in an imperfect union?
question

contact area
answer

what term is used to describe where the proximal side of two teeth come together/touch?
question

supplemental groove
answer

what is a shallow, linear groove that radiates from the developmental groove?
question

marginal ridges
answer

what is the elevated area of enamel that forms the mesial and distal borders of the lingual surface?
question

buccal groove
answer

what is the linear depression forming a groove that extends from the middle of the buccal surface to the occlusal surface of the tooth?
question

mandibular first molar
answer

which tooth has two pulp canals in one of its root?
question

mandibular central incisor
answer

what is the smallest tooth in the adult dentition?
question

maxillary first premolar
answer

which premolar has two roots?
question

maxillary first molar
answer

which tooth contains the cusp of carabelli?
question

maxillary canine
answer

which tooth has the longest root in the maxillary arch?
question

mamelons
answer

what term describes the three bulges on the incisal edges of newly erupted centrals?
question

transverse ridge
answer

what term describes the union of two triangular ridges that produces one ridge across the occlusal surface of the tooth?
question

by 12 years
answer

at what age should all dentition teeth have exfoliated?
question

mandibular first molar
answer

what are the first permanent teeth to erupt?
question

fossa
answer

what term describes the shallow rounded or angular depression found on the tooth surface?
question

central incisors
answer

what teeth play an important role in speech?
question

cingulum
answer

what term describes the convex area on the lingual surfaces of the anterior teeth?
question

clinical crown
answer

the portion of the tooth visible in the mouth is termed?
question

apical foramen
answer

what is the opening in the apical portion of each root termed?
question

four
answer

how many quadrants are in the oral cavity?
question

cuspid to cuspid
answer

the anterior teeth are run from?
question

6 months of age
answer

when does the first tooth usually erupt?
question

3 years old
answer

at what age should all deciduous teeth be fully erupted?

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