exam 2 (anterior teeth) Flashcards
how many incisors are there?
8 - 4 lateral and 4 central
how many canines
4
replaces primary teeth?
succedaneous(all anterior teeth are this)
a center of development from which a tooth is formed
lobe
all anterior teeth have how many lobes
4- 3 labial and 1 lingual
how many labial developmental depressions are there outlining the separations of the lobes
two labial depressions
remnants of lobe formation; form a scalloped border along incisal edge of incisors
mamelons
from the labial or lingual surface, the CEJ appears as a what?
semi-circle curving toward the root
from the proximal surface, the CEJ curves how?
incisally; depth of curvature varies from 1-3 mm
in most cases, the root tip of an anterior tooth has a what inclination?
distal
which tooth frequently has a mesially inclined root tip
mandibular canine
all anterior teeth have how many roots and pulp canals
one root and one pulp canal
a tooth that contacts another tooth in the opposite arch
antagonist
all anterior teeth have how many antagonists?
two; except mandibular centrals which only have one
a shallow, round depression
fossa
a linear elevation
ridge(mesial marginal ridge)
a convex, rounded elevation or tubercle on the cervical third of lingual surface
cingulum
a shallow, linear concavity located on either the crown or the root
developmental depression
a pinpoint depression
pit
some individuals the maxillary incisors are separated by a what
diastema
when do the maxillary incisors emerge?
7 and 8 yrs old
what has the largest clinical crown of all incisors?
maxillary central incisor
most common deviation in maxillary centrals is a what
blunted root
fine horizontal lines on the enamel of all newly erupted teeth; more prominent on young teeth because they become lost due to abrasion in eating
perikymata
pulp space for max central incisors
large, single pulp space
3 pulp horns from the facial view
morphologic variation of maxillary lateral incisor?
- may be missing
- may resemble a small max central incisor
- may be peg-shaped
which shows the most variation of any tooth except the third molars
maxillary lateral incisor
what is the second most commonly missing
maxillary incisors
which tooth could be peg shaped
maxillary lateral incisors
which tooth has a long, slender appearance
maxillary lateral incisors
which tooth’s pulp space is more likely to exhibit constrictions and accessory canals
max lateral incisor
what tooth has a developmental pit in the fossa just incisal to the cingulum
maxillary lateral incisor
what tooth sometimes has a groove called the palatalgingival groove that extends onto the crown
maxillary lateral incisor
what teeth are the cornerstones of the arches?
canines
which teeth are the longest of the permanent teeth?
canines
which teeth are the last teeth to be exfoliated(lost)
canines
what are the maxillary canines pulp canals and horns
usually have a single pulp canal and a large pulp chamber; and the pulp chamber usually only has one pulp horn
canine protected occlusion; relieves the posterior teeth from damaging occlusal forces
canine guidance
what tooth resembles a pentagon
canine
which tooth is divided into mesial and distal cusp ridges
canine
a transitional tooth
canine
which tooth is the only anterior teeth with a labial ridge
canine
which tooth is wider labio-lingually than it is mesio-distally to offset the forces brought against it during function
maxillary canine
which tooth has cusp slopes and not incisal edges
maxillary canine
which slope is shorter on the labial view of the canines? (m or d)
mesial slope
how is the cusp tip situated on the root axis line of a maxillary canine labial view?(centered or mesial/distal)
centered on the root axis line
which contact point on the maxillary canines is closer to the cusp tip?
mesial contact point- located at junction of incisal and middle thirds
distal contact point of maxillary canine is located more (incisal or cervically)
more cervically located- located at middle of middle third
max lateral incisor: on mesial view, incisal edge is more____; on distal view, the incisal edge is more_____ to root axis line
labial; lingual
for the maxillary canine on the lingual view, the mesial marginal ridge is (longer or shorter) than the distal marginal ridge
longer
on the maxillary canine mesial view, the cusp tip is located (labially or lingual) to the root axis line– since this tooth overlaps the mandibular teeth when the jaws are closed
labially
on the maxillary canines distal view, the longitudinal depression is more distinct on the mesial or distal side?
distal
CEJ on maxillary canines, the curvature is greater on the mesial or distal surface?
mesial
in the incisal view of maxillary canines, which bulk is greater? (mesial or distal)
distal
why is the distal bulk of the maxillary canine on the incisal edge greater than the mesial bulk?
to make contact with the maxillary first premolar
on the incisal view of maxillary canine, which side (mesial or distal) is somewhat concave, giving it a pinched look faciolingually?
disal half is pinched
the maxillary canine has a what two ridges?
labial and lingual ridge
from the labial view of the maxillary canine, the ___ crown outline is less curved than the ____ (mesial or distal)
mesial; distal
when do the mandibular canines erupt?
between 9 and 10 years old
root completion of mandibular canines?
between 12 and 14 years old
mandibular canines usually erupt ____ the maxillary canines and ____ most of the incisors have erupted
before; after
