Anatomy Of Canines

Front 1

Which are the longest teeth in the mouth and considered "corner stones"?

Back 1

Canines
Aka-cuspids, eyeteeth, and fangs

Often the last teeth standing--makes them good anchor teeth for partials and bridgework.

Front 2

What is the function of canines?

What age to they erupt (permanent)?

Back 2

pierce or shear food and lip support for lip

Erupt around age 9-10 (MN) 11-12 (MX)

Front 3

Describe the general trains of canines

-cusps
-general shape from facial view
-Wider M-D or FA-LN
-Which side is more convex (M or D)
-Which surface do they converge towards?
-How many loves
-special indicator in arch

Back 3

-One cusp
-facial view pentagon shaped
-wider labial/lingual than mesial/distal
-Crown more convex on the distal
-crowns and roots narrower from FA to LN
-4 lobes-3 labial, 1 lingual
-Canine eminence-labial bony ridge, helps maintain facial form

Front 4

Which teeth have the longest roots of all teeth?

Back 4

Maxillary canines

Front 5

Where are the contacts for maxillary canines?

Back 5

incisal 1/3rd on mesial

middle 1/3rd on distal

Front 6

What angle do the cusp ridges form on maxillary canines (from a facial view)?

-What else is characteristic of the cusp ridges of maxillary canines?

Back 6

Sharp 105* angles

Cusp ridges make up almost 1/3rd of the FA length

Front 7

MAXILLARY CANINES

-From an incisal view, which measurement is larger M-D or FA-LN

Back 7

Maxillary canines are thicker FA-LN than M-D

FA/LN > M/D

*Not symmetrical

Front 8

Describe the labial ridge of maxillary canines

Back 8

Prominent labial ridge from middle lobe

Front 9

From an incisal view, which surface FA or LN is more visible on maxillary canines and why.

Back 9

From an incisal view, the lingual surface is more visible due to the labial tilt.

Front 10

Describe the lingual aspect of maxillary canines in terms of the lingual ridge and fossas.

Compare these fossas to those of the MN canines

Back 10

Prominent lingual ridge, cusp tip to cingulum.

-shallow M and D fossas on each side of the lingual ridge

-DEEPER THAN THE MN CANINES

Front 11

Which is shorter for maxillary canines the mesial cusp ridge or the distal cusp ridge of the buccal cusp?

Back 11

Mesial cusp ridge is shorter than the distal cusp ridge

Front 12

Describe the root depressions from the mesial vs. distal views from maxillary canines.

What is the function of these depressions?

Back 12

-Vertical distal root depression > than mesial, it can extend the entire root length
-MX root depressions>MN root depressions

-Depressions help to anchor teeth and prevent rotation.

Front 13

For maxillary canines, what is unique about the facial HOC?

Back 13

It is further from the cervical line and more prominent

Front 14

Is the CEJ curved more on the mesial or distal of maxillary canines?

Back 14

mesial

Front 15

Where is the incisal ridge in relation to the long axis of the tooth for maxillary canines?

For mandibular canines?

Back 15

-MX-incisal ridge is labial/facial to the long axis

-MN-incisal ridge is lingual to the long axis.

Front 16

Describe the root of maxillary canines

Back 16

Root may be pointed

Most often bent distally and LABIALLY

Front 17

Describe the cingulum of maxillary canines

Back 17

Large centered cingulum
-small cusp-like or tubercle (it's NOT a cusp but it can resemble one)

-There may be a lingual groove or pit.

Front 18

From the lingual view, which is longer on a maxillary canine--MMR or DMR?

How do the MMR and DMR compare the the lingual ridge?

Back 18

-The mesial marginal ridge is longer than the distal.

-Neither the MMR or DMR are as prominent as the lingual ridge.

Front 19

How does the crown of maxillary canines compare to the crown of maxillary central incisors?

Knowing the above, how are maxillary canines the longest teeth in the arch?

What is ratio of root:crown for maxillary canines?

Back 19

-Crowns of maxillary canines are almost as long as those of the maxillary centrals.

-The root of maxillary canines is longer than those of mx. central incisors.

-Root of MX canines is 1.5x crown length

Front 20

How does the overall shape and the labial surface of mandibular canines differ from maxillary canines?

Back 20

-MN are more symmetrical than MX

-Labial surface is more smooth and convex-labial ridge is not as prominent on MN canines

Front 21

How does the mesial outline compare to the distal outline on MN canines?

Back 21

Mesial outline is almost flat, distal is convex in the incisal 2/3rds

It seems bent distally

Front 22

Where is the contact on the m and d of mandibular canines?

Back 22

Mesial: Incisal 1/3rd

Distal: junction of middle and incisal 1/3rd

Front 23

For mandibular canines which is shorter the mesial cusp ridge or the distal cusp ridge?

Back 23

Mesial cusp ridge is shorter

Front 24

For MN canines, is the crown larger FA/LN or M/D?

Is the MN crown bigger or smaller than the MX canines?

Back 24

-Crown in larger FA/LN than M/D

-crown is smaller than MX

Front 25

Where is the cusp tip on mandibular canines?

Back 25

Cusp tip near the FA/LN center (tipped lingually)

Front 26

Which of the canines exhibit a slight disto-lingual twist?

Back 26

Mandibular canines

Front 27

Describe the roots of mandibular canines in terms of
-apex shape
-curve
-root depression
-width FA vs. LN

Back 27

-Roots more sharply pointes than MX
-often straight or mesial curve (don't rely on distal cruvature for tooth ID
-prominent root depressions, especially mesial
-root tapers towards the LN

Front 28

Compare the lingual view of MN canines to that of the MX canines
-lingual ridge and fossas
-Cingulum
-MMR and DMR

Back 28

-Lingual ridge and fossas less prominent
-cingulum less prominent and lies just distal (centered on MX), smoother lingual surface
-MMR longer than DMR (same as MX) BUT less prominent than MX

Front 29

Of all the canines, which have the greatest curvature of the CEJ and on what surface?

Back 29

-mesial surface of mandibular canines. The cervical line curves more incisal than MX.

Front 30

Compare the facial HOC and crown length of mandibular vs. maxillary canines

Back 30

-FA height of contour more cervical than MX and less cervical bulge

-MN crown is longer and narrower

Front 31

Where is the incisal ridge in comparison to the long axis for MN canines?

Back 31

lingual

Front 32

What canine anomaly exists?

Back 32

Tooth may have bifurcated roots

**The only anterior tooth with this feature

-If this is the case they are positioned facially, lingually

Front 33

Compare the crown features of the MX vs. MN canines

Back 33

MX-prominent lingual anatomy, sharp cusp tip

MN-smoother lingual anatomy, less sharp cusp tip

Front 34

where is the HOC for the LN and LA of canines?

Back 34

LA/FA-cervical 1/3rd (further from cervical line and more pronounced on MX)

LN-middle third