Lecture 5 Maxillary Canines Flashcards
Describe the cusp of the maxillary canine
single and pointed
what is the function of the maxillary canine
to tear, pierce and hold food
-supports facial musculature
what do the maxillary canines form in the arch
the cornerstone
what separates the maxillary canine root from the rest
has the longest and thicket root (FL) of all the teeth
what is the canine eminence
prominent ridge of bone on the labial aspect
what would happen if you lost a canine
change of shape of face in this area
what is the function of the canine as a guiding tooth
the mandibular canine slides along the lingual surface of the maxillary canine and guides the mandible
what are the long roots of the canine good for
anchor and support for prostheses
what are the numbers of the maxillary canine
6 and 11
when do maxillary canine erupt
11-12 years of age
how many lobes do the maxillary canine develop from and what are they
4 lobes
-3 labial lobes: mesial, middle, distal
-1 lingual- develops into cingulum
which lobe of the maxillary canine shows the greatest development
middle labial lobe
which canine is larger
maxillary
what is a cusp
elevation on the crown of the tooth made up of 4 ridges
what are the cusps of the maxillary canine
mesial cusp ridge, distal cusp ridge, facial cusp ridge, lingual cusp ridge
what is the geometric form of the maxillary canine
a trapezoid (not including the cusp tip)
what is the cusp tip of the maxillary canine in line with
the center of the root
how big is the incisal margin of the maxillary canine
1/3 of total crown length
describe the mesial cusp ridge compared to the distal cusp ridge from the facial view of the maxillary canine
the mesial cusp ridge is shorter and less slopes than the distal cusp ridge
describe the difference between the mesioincisal angle compared to the distoincisal angle from the facial view of the maxillary canine
the mesioincisal angle is more incisal than the distoincisal
describe the cervical line from the facial aspect of the maxillary canine
curves apically
where is the mesial contact of the maxillary canine loacted
at the junction of the middle and the incisal third
describe the mesial profile of the maxillary canine from the facial view
slightly convex, but can be slightly concave cervical to contact area
where is the distal contact of the maxillary canine
in the middle third
describe the distal profile of the maxillary canine from the facial view
more convex, more rounded distoincisal angle
-concave from contact to the cervical line
what are the MF and DF depressions of the maxillary canine
shallow depressions where the 3 labial lobes join
what does the facial ridge of the maxillary canine develop from
the middle labial lobe
describe the mesial to facial ridge of the maxillary canine
convex
describe the distal to facial ridge of the maxillary canine
tendency to form concavity in cervical third
describe the root of the maxillary canine from the facial aspect
conical, long and narrow, bluntly pointed apex that curves mesially or distally (mostly distally) in apical third, convex on labial aspect
describe the linguial view of the maxillary canine
-crown and root are narrower
- CEJ has greater curvature
-distinct mesial and distal marginal ridges
-prominent convex cingulum
where is the lingual ridge of the maxillary canine
ridge from cusp tip that blends into incisal portion of the cingulum
what is between the lingual and marginal ridges of the maxillary canine
mesiolingual and distolingual fossa
what aspects of the root of the maxillary canine are visible from the lingual view
-mesial and distal aspect
- developmental depressions on the mesial and distal aspect
describe the shape of the crown of the maxillary canine from the mesial view
triangular or wedge shaped
where does the cusp tip of the maxillary canine lie in relation to the line bisecting root
labial
describe the labial outline of the maxillary canine from the mesial view
slightly convex and the height of contour is in the cervical third
describe the lingual outline of the maxillary canine from the mesial view
convex in the cingulum area, slightly concave in incisal portion
-lingual height of contour is in the cervical third
-cervical line curves toward the incisal edge
describe the root of the maxillary canine from the mesial view
conical
- very broad labiolingually from cervical line to 1//2-2/3 length
-mesial developmental depression
-tapered apex
how is the distal view of the maxillary canine different from the mesial view
-definite concavity between the contact and cervical line
-cervical line is flatter but curves toward incisal edge
- dista marginaly ridge is heavier and more irregular in outline
-developmental depression on root is more pronounced
which dimension of the maxillary canine is greater: labiolingually or mesiodistally
labiolingually > mesiodistally
where are the. mesial and distal contact areas of the maxillary canine from the incisal view
they are centered faciolingually
where is the cusp tip of the maxillary canine located from the incisal view
labial to the center of crown
describe the difference in outline of the maxillary canine of the mesial half and the distal half of the facial profile from the incisal view
the mesial half is convex and the distal half is concave
describe the ridges of the maxillary canine facially and lingually from the incisal view
- prominent facial ridge
-prominent lingual ridge, distolingual and mesiolingual fossae
what is the broadest (FL) single rooted tooth
maxillary canine
what is the longest tooth in the arch
maxillary canine
describe the pulp horn shape and number of the maxillary canine
oval in cervical and middle third, round in shape is apical third
- mesial and distal root concavities- distal is more pronounced
- 1 pulp horn
what are the numbers of the mandibular canines
27 and 22
when do mandibular canines erupt
9-10 years (before the maxillary)
what are the 4 lobes in the mandibular canines
-3 labial
-1 lingual
what is the difference between the mandibular canines and maxillary canine MD and cingulum
the mandibular canines is narrower MD and cingulum is not as well developed in mandibular canines
what is the difference between mandibular canines and the maxillary canine ridges
mesial and distal marginal ridges are not as prominent
describe the cusp height compared to the entire crown of the mandibular canines
cusp height is 1/5 height of crown
compare the crown length incisogingivally compared to maxillary canine
crown in as longer or longer in mandibular
describe the difference between mesial cusp arm and distal cusp arm in the mandibular canines
mesial cusp arm is shorter than the distal cusp arm
describe the mesial outline from crown to root from the facial view of the mandibular canines
outline is straight and in line with mesial outline of the root
where is the mesial contact of the mandibular canines
incisal third
describe the distal outline of the mandibular canines from the facial view
distal outline is convex and overhangs the root
-crown appears bent distally on the root
- distal contact is in the middle 1/3
describe the root features of the mandibular canines from the facial view
-root is shorter by 1-2 mm compared to maxillary canine
- root curvature if present is to mesial
describe the cingulum, marginal ridges, fossas of mandibular canines from lingual view
cingulum is poorly developed
- ridges and fossa are less developed
describe the cervical third, incisal portion, and labial aspect of the mandibular canines from the mesial view
-cervical third is narrower than maxillary canine
-incisal portion is thinner than maxillary canine
-labial is less curved than maxillary canine
where are the labial and lingual height of contour from the mesial view of the mandibular canines
in the cervical 1/3
describe the lingual outline of the mandibular canines from the mesial view
more concave due to less prominent cingulum
where does the cusp tip of the mandibular canines lie in relation to the line bisecting the root
cusp tip is lingual to the line bisecting the toor
are there developmental depressions on the root of the mandibular canines from the mesial view
yes
what are the differences between the distal view and the mesial view of the mandibular canines
-curvature of CEJ is not as steep on distal
- developmental depression on the root of distal is more pronounced
describe the labial outline of the mandibular canines from the incisal view
less convex than maxillary and facial ridge is less developed
- mesial and distal marginal ridges are less developed than the maxillary canine
where does the cusp tip of the mandibular canines lie from the incisal view
slightly lingual
where is the mesial cusp arm from the incisal view of the mandibular canines
inclined slightly lingual
describe the root and pulp of the mandibular canines
single root often curved to the mesial, canal and root are wide labiolingually
- 2 canals 20% of the time
-deep distal developmental depression
what anterior tooth is most likely to have a bifurcated root
mandibular canine
what tooth is the often the last remaining tooth in an arch
canines
