Canines (complete) Flashcards
What is the eating functions of canines
they act with incisors
they hold, pierce, cut and shear food
what are the esthetic functions of canines
help form the anterior smile and are the edges of the social six
they also help support the lips and facial muscles
how does the canine eminence affect esthetics
it forms the corners of the arch
what is the canine eminence
it is the alveolar bone over the maxillary canines that bulges outward due to the shape of the root
what do we have to remember about the canine eminence when working with it
it is a VERY thin bone
what is the name for the protective function of the canines
canine guidance
what is canine guidance
a means of protection for the other teeth. It protects the posterior teeth from potentially damaging horizontal forces by being the first points of contact as you move your jaw laterally. It causes the mouth to open wider and avoid collision of the posterior teeth
What teeth make the transition point from anterior to posterior teeth
the canines
What are the #1 and #2 longest teeth in the mouth
#1 is the maxillary canine #2 is the mandibular canine
How easy are the canines to extract and why
they are very difficult because of the length and size of the root
Why do we often say that canines are “self cleansing”
because they are strong teeth that lack pits and grooves. so they are often the last teeth to have catastrophic decay
how many, and where are, the lobes of canines
there are 4 lobes, 3 facially and 1 lingually
When is the initiation of calcification of Mandibular canines
4.5 months
when is the initiation of calcification of maxillary canines
4.5 months
when is the crown complete for mandibular canines
6.5 years
when is the crown complete for maxillary canines
6.5 years
when is eruption for the mandibular canines
9.5 years
when is the eruption for the maxillary canines
11.5 years
when is the root complete for the mandibular canines
13 years
when is the root complete for the maxillary canines
14 years
what are the most common sequences of tooth eruption for the permanent maxillary teeth (palmar)
6-1-2-4-3-5-7-8
6-1-2-4-5-3-7-8
What are the most common sequences of tooth eruption for the permanent mandibular teeth (palmar)
(6-1) 2-3-4-5-7-8
(6-1) 2-4-3-5-7-8
what are the universal numbers for the maxillary canines
6 and 11
what is the outline form from the facial view of the maxillary canines
pentagon
what is the prominent anatomical feature on the facial surface of canines
labial ridges
Where is the incisal tip in line with the center of the root
it is right in line
what is the angle of the cusp tip on the maxillary canines
105 degrees
how do the cusp ridges on the maxillary canines compare with each other
the mesial cusp ridge is shorter than the distal cusp ridge
what is the mesial proximal outline form like on maxillary canines
it is broadly convex
what is the distal proximal outline form like on maxillary canines
convex at the middle third and it looks like it has been stretched distally
usually there is a slight concavity in the cervical third
What are the proximal contacts of the maxillary canines
mesial is at the junction of the incisal and middle third
distal is in the middle third
What are the lingual landmarks of the maxillary canines
cingulum
lingual ridge
marginal ridges
fossae
what is the cingulum on the lingual surface of the maxillary canines like
it is large and centered
what is the lingual ridge of the maxillary canines like
it is continuous with the cusp tip
where are the fossae of the lingual side of the maxillary canines
distal and mesial to the lingual ridge and between the marginal ridges
How do the incisocervical and labiolingual dimensions of the crown compare on maxillary canines
it is greater incisocervically
how does the labiolingual measurement of the maxillary canines compare to the labiolingual dimension of other anterior teeth
it is the greatest labiolingual measurement of all the anterior teeth
what is a good way to describe the shape of the crown of the maxillary canines from the proximal view
wedge-shaped (triangular)
where are the cusp tips of maxillary canines in relation to the mid root axis from the proximal view
the cusp tip is labial to the root axis
where are the heights of contour on maxillary canines located
in the cervical 1/3
how does the height of contour of the maxillary canines compare to the height of contour of the incisors
it is more incisal on the maxillary canines
what does the facial surface of the maxillary canines look like from the proximal view
it is convex, then straightens out as it approaches the incisal tip
what is the shape of the lingual surface of the maxillary canine from the proximal view
s shaped
how do the mesial and distal cervical lines compare on the maxillary canine
it curves 2-3 mm incisally on the mesial side. the distal side curves less
on which side of the tooth (mesial or distal) is the cervical crown concavity larger on the maxillary canines
it is larger on the distal side. but usually present on both
how do the labiolingual and mesiodistal crown dimensions compare in maxillary canines
the labiolingual dimension is slightly greater than the mesiodistal dimension
where is the cusp tip of the maxillary canine relative to its root from the incisal view
it is mesial and labial of the center
is the maxillary canine symmetrical from the incisal view
no
if the cusp tip on the maxillary canine is mesial to the center of the root, what does that mean for the cusp ridges
that the mesial cusp ridges is shorter
from the incisal view what does the crown outline look like on the maxillary canine
it is a series of four arcs
from the incisal view how does the incisal edge line up on the maxillary canine
the incisal edge is straight mesiodistally, and it bisects the proximal arcs (points of greatest convexity)
with what does the cingulum of the maxillary canine coincide
the root position
from an incisal view how does the cingulum of the maxillary canine compare to the labial ridge
the cingulum is smaller
what is the labiolingual root taper of the maxillary canine
the root is more narrow on the lingual side than on the facial
on which side of the maxillary canine is the longitudinal root depressions more pronounced
on the distal side
can there be a sharp curvature mesailly or distally to the root apex on the maxillary canine
yes
the taper towards the apex of the maxillary canine is greater on the facial side or the lingual side
the lingual side
what are the universal numbers for the mandibular canines
22, 27
why does the mandibular canine seem longer (incisocervically) than the maxillary canine
because the crown is narrower mesiodistally
how does the labial ridge of the mandibular canine compare to the labial ridge of its maxillary counterpart
it is less prominent
What is the angle of the cusp tip of the mandibular canine
it is 120 degrees (less sharp, more blunt than the maxillary caninne)
how does the cusp tip of the mandibular canine line up with the center of the root
it lines up right in line with the center of the root
how does the mesial cusp ridge compare to the distal cusp ridge of the mandibular canine
it is much shorter than the distal cusp ridge
which tooth seems to have a distal bend
the mandibular canine
what does it mean that the mandibular canine has a distal bend
that there is noticeably more crown distal to the root axis line than to the mesial of it
what is the mesial proximal outline form like from the facial view of the mandibular canine
it is almost flat, to slightly convex. its root-crown line is almost continuous
what is the distal proximal outline form like from the facial view of the mandibular canine
it is convex in the incisal 2/3, and slightly concave in the cervical 1/3
where are the proximal contacts of the mandibular canine
Mesial = incisal third distal = middle third
how does the cingulum of the mandibular canine compare to the cingulum of the maxillary canine
it is much less developed and more smooth.
it can be either centered or distal
How do the lingual and marginal ridges of the mandibular canine compare to the maxillary counterpart
they are less distinct
what are the wear patterns on the incisal edge of the maxillary canine
its incisal ridges are worn toward the lingual
what are the wear patterns on the incisal edge of the mandibular canine
the incisal ridges are worn toward the facial
what is the crown online like for the mandibular canine from the proximal view
triangular and wedge shaped
how does the lingual outline of the mandibular canine from the proximal veiw compare to the same outline from the same view of the maxillary canine
it still has the S curve but it has less curvature
where are the heights of contour on the mandibular canine
they are both in the lingual third
how does the heights of contour of the mandibular canine compare to those of incisors
they are more incisal on the canines
how does the cervical line of the mandibular canine compare to the cervical line of the maxillary canine
it is more towards the incisal on the mandibular canine.
where does the cusp tip of the mandibular canine line up with the mid root axis
it is centered or lingual to the mid root axis
which appears to have the more pointed cusp from the proximal view the mandibular canine or the maxillary canine
the mandibular canine due to its smaller cingulum, less prominent ridge, and thinner incisal portion (labiolingually)
Which is greater the labiolingual dimension or the mesiodistal dimension of the crown of the mandibular canine
it is greater labiolingually
what are the cusp tip and ridges like for the mandibular canine from the incisal view
they are more likely to be inclined lingually especially on the distal end
it is also lingual to the proximal arcs and labiolingual center
what is the anterior tooth the is most likely to have a bifurcated root
the mandibular canine (facial and lingual root)
what does the labiolingual root taper of the mandibular canine mean
the root is more narrow on the lingual side than the labial side
on which side of the root is the longitudinal root depressions more pronounced on the mandibular canine
the distal
on which side (lingual or labial) is the apical taper greater for the mandibular canine
the lingual side
how does the root apex for the mandibular canine compare to the root apex of the maxillary canine
it is more pointed
how does the length of the root of the mandibular canine compare to the length of the root of the maxillary canine
it is shorter by 1-2 mm
