anatomy of permanent maxillary canine

1. PERMANENT MAXILLARY CANINE
Presented by : Dr.Bhavna Tyagi
MDS 2ND Year
Under the Guidance of :
Dr.Deepak Bhargava (HOD),
Dr.Puja Bansal (Reader),
Dr.Mithilesh N. Mishra (Reader),
Dr.Ritika Sharma (Reader),
Dr. Vidyadevi Chandavarkar (Reader)

2. Content
• Introduction.
• Chronology.
• Average Dimension.
• Labial Aspect.
• Lingual Aspect.
• Mesial Aspect.
• Distal Aspect.
• Incisal Aspect.

3. Introduction
• Canines are very long and stable teeth.
• Develops from 4 lobes, 3 labial and 1 lingual.
• Middle labial lobe well developed into a cusp.

4. • There are 4 canines (2 Maxillary & 2 Mandibular)
placed at corner of mouth & hence called ‘corner
stones’ of the dentition.
• Single pointed cusp present so also called cuspids.
• The canine's role in mastication is mainly tearing,
which is intermediate between incising of anterior
teeth & grinding of the posterior teeth.

5. • Canine eminence- bony ridge over the labial
surface of roots, has a cosmetic value helps
form a foundation that ensures normal facial
expression at the corners of the mouth.
• Arch position - The permanent maxillary canine
replaces deciduous maxillary canine & is located
3rd from midline in each maxillary quadrant.
• Mesial contact : Maxillary lateral incisor.
• Distal contact : Maxillary first premolar.

6. Chronology
• First evidence of calcification : 4-5 mo
• Enamel completed : 6-7 yr
• Eruption : 11-12yr
• Root completed : 13-15yr

7. Average Dimension (in mm)
Crown Length 10
Root Length 17
Mesiodistal Diameter at Contact Area 7.5
Mesiodistal Diameter at Cervical Lines 5.5
Labiolingual Diameter at Crest of Curvature 08
Labiolingual Diameter at Cervical Lines 07
Curvature of Cervical Line : Mesial 2.5
Curvature of Cervical Line : Distal 1.5

8. Labial Aspect
• The crown of maxillary canine is narrower
mesiodistally than that of maxillary central
incisor.
• It has two slopes (cusp ridges), the mesial
slope being shorter than the distal slope.
• The labial surface is smooth and bulky in
the middle because of the labial ridge.

9. • Imbrication lines can often be found
in cervical 3rd of the facial surface :
“Lines of Pickerell”.
• Mesial outline : usually convex from
the cervix to the center of the mesial
contact area or the crown may
exhibit a slight concavity above the
contact area .
• Rounded mesioincisal angle.

10. • Height of contour (mesial margin) : at contact
area (junction of incisal & middle thirds).
• Distal Outline: usually concave between CEJ
and DCA.
• Distal margin : Shorter than the mesial margin
& also has a more rounded incisal angle.

11. • Height of contour : at contact area (middle
3rd)
• Cusp tip is in line with the center of the
root.
• Cusp slopes shows tendency toward
concavity(notch) before wear has taken.
• Labial surface is convex in all directions,
but curvature is more pronounced
mesiodistally.
• General outline of the surface is
pentagonal.

12. • Incisal aspect has a large
cusp with a pointed cusp
tip.
• Incisal margin - divided
into two components by tip
of cusp & are termed the
mesioincisal and
distoincisal slopes (or
mesial & distal cusp
ridges).
• Root appears slender,
conical in form with a blunt
apex, root may curve
mesially or distally.
Labial
aspect
Labial ridge
Cusp
tip
Distal
cusp
ridge
Mesial
Cusp Ridge

13. LABIAL ASPECT

14. Lingual Aspect
• Crown and root are narrower lingually.
• Cingulum is well developed, large &
sometimes pointed like a cusp.
• Cervical line curves asymmetrically toward
the apex with a slight offset to the distal.

15. LINGUAL ASPECT

16. • Strongly developed marginal ridges, occasionally a well-
developed lingual rigde at the center with two shallow
concavities namely; Mesial and Distal lingual fossa.
• Root narrower than labial, mesial and distal surface of root is
visible lingually.
• Developmental depressions M and D may be seen.
CL : Cervical line
C : Cingulum
MMR : mesial marginal ridge
DMR : distal marginal ridge
LR : lingual ridge
DLF : distolingual fossa

17. Mesial Aspect
• From the mesial aspect canine looks
similar but bulkier than maxillary central
incisor.
• Maxillary canine is the widest anterior
tooth labio lingually.
• The outline of the crown is wedge
shaped , the greatest measurement
being at the cervical 3rd.
• Wedge point being represent by the tip
of the cusp.

18. • Below the cervical 3rd of the crown , the labial
face may be presented by a line only slightly
convex from the crest of curvature at the
cervical third to the tip of the cusp.
• Labial outline exhibits more convexity.
• The lingual outline of the crown may
represented by a convex line describing the
cingulum , which convexity straightens out as
the middle 3rd is reached , becoming convex
again in the incisal 3rd.

19. • CEJ curves approximately 2.5 mm incisally .
• The contact area is near the junction of the
incisal and middle third.
• Root outline is conical, tapered or blunt pointed
apex, may curve labially .

20. • Labial outline of root maybe almost
perpendicular .
• Mesial surface of root appears
broad with shallow developmental
depression that help to anchor the
teeth in the alveoli and help
prevent rotation and displacement.
• A line bisecting the cusp is labial to
a line bisecting the root.

21. Distal Aspect
• Same as mesial except the following:
a. Less curvature of CEJ (approx. 1 mm) .
b. Contact area is broader .
c. Distal marginal ridge is heavier .
d. More irregular in outline.
e. More concave surface.
f. More pronounced root developmental
depression.

22. Incisal Aspect
• The labiolingual dimension is greater than the
mesiodistal dimension
• Maxillary canine is generally convex in both its labial and
lingual outlines
• The cusp tip is labial to the centre of the crown
labiolingually and mesial to the centre mesiodistally
• The labial ridge and the cingulum are very noticeable
from this aspect
Incisal aspect

23. • When cut cross-sectionally,
mesial section, shows greater
labiolingual bulk, crown gives
impression of having all the
distal portion stretched to
contact first premolar.
• Line bisecting cusp and cusps
ridges in the MD direction is
almost always straight .
• Distal slope is longer than
mesial slope

24. MLF, mesiolingual fossa;
MCR, mesial cusp ridge;
DCR, distal cusp ridge;
DLF, distolingual fossa;
C, cingulum

25. Root
• Only one
• Longest and strongest of all the teeth in the mouth
• Mesial & distal surfaces of root have developmental
depressions
• From all aspects, the root tapers gradually to a sharp, or
slightly blunted apex
• Wider labiolingually than mesiodistally
• Lingual and labial surfaces are convex

26. References
• WHEELER’S dental anatomy, physiology , and
occlusion 8th edition .