Chapter 9 Test Test Answers – Flashcards
Unlock all answers in this set
Unlock answersquestion
the cervical line divides what?
answer
the crown & the root; anatomical crown and root join here
question
what is the study of the structure and form of teeth?
answer
tooth morphology
question
how many teeth are in the adult dentition?
answer
32 teeth
question
what is the period of mixed dentition?
answer
6-12 years
question
what is the dividing point of a multi-rooted tooth?
answer
furcation
question
what is the elevated area of enamel that extends obliquely across the tooth?
answer
oblique ridge
question
which teeth are sometimes congenitally missing?
answer
maxillary laterals
question
which teeth are often called the "cornerstone of the mouth"?
answer
canines
question
which premolar is often considered for removal during orthodontic treatment?
answer
maxillary first premolar
question
which tooth has nonfunctioning lingual cusps?
answer
mandibular first premolar
question
which tooth appears to have four equally sized cusps?
answer
second molar
question
which teeth in the permanent dentition are farthest from midline?
answer
wisdom teeth or third molar
question
what is a developmental groove where decay often initiates in an imperfect union?
answer
fissure
question
what term is used to describe where the proximal side of two teeth come together/touch?
answer
contact area
question
what is a shallow, linear groove that radiates from the developmental groove?
answer
supplemental groove
question
what is the elevated area of enamel that forms the mesial and distal borders of the lingual surface?
answer
marginal ridges
question
what is the linear depression forming a groove that extends from the middle of the buccal surface to the occlusal surface of the tooth?
answer
buccal groove
question
which tooth has two pulp canals in one of its root?
answer
mandibular first molar
question
what is the smallest tooth in the adult dentition?
answer
mandibular central incisor
question
which premolar has two roots?
answer
maxillary first premolar
question
which tooth contains the cusp of carabelli?
answer
maxillary first molar
question
which tooth has the longest root in the maxillary arch?
answer
maxillary canine
question
what term describes the three bulges on the incisal edges of newly erupted centrals?
answer
mamelons
question
what term describes the union of two triangular ridges that produces one ridge across the occlusal surface of the tooth?
answer
transverse ridge
question
at what age should all dentition teeth have exfoliated?
answer
by 12 years
question
what are the first permanent teeth to erupt?
answer
mandibular first molar
question
what term describes the shallow rounded or angular depression found on the tooth surface?
answer
fossa
question
what teeth play an important role in speech?
answer
central incisors
question
what term describes the convex area on the lingual surfaces of the anterior teeth?
answer
cingulum
question
the portion of the tooth visible in the mouth is termed?
answer
clinical crown
question
what is the opening in the apical portion of each root termed?
answer
apical foramen
question
how many quadrants are in the oral cavity?
answer
four
question
the anterior teeth are run from?
answer
cuspid to cuspid
question
when does the first tooth usually erupt?
answer
6 months of age
question
at what age should all deciduous teeth be fully erupted?
answer
3 years old
