This document describes the anatomical features of the permanent mandibular canine tooth. It notes that the crown is narrower than the maxillary canine and may have bifurcated roots. The labial surface has a trapezoidal crown outline and higher contact areas than the maxillary canine. The lingual surface has a flatter crown outline with a poorly developed cingulum. The mesial and distal surfaces have a triangular crown outline and more pronounced developmental depressions on the root.

1. PERMANENT MANDIBULAR
CANINE
Dr. Ramil B. Simsuangco
Oral Anatomy Professor
College of Dentistry
Manila Central University

2. Mandibular
canine
Crown is narrower than
Maxillary canine
Variation:
Bifurcated roots

3. Labial Aspect
 Crown outline is trapezoidal
 Mesiodistal dimensions less than
maxillary
 Crowns appears longer than
maxillary, higher contact areas
 Contact Areas:
 Mesial – incisal 3rd, just below the incisal
angle or near the angle
 Distal – near junction of middle and
incisal 3rd

4. Labial Aspect
continued....
 Mesial crown outline nearly straight
 Cusp angle is in line with the center of
the root; mesial cusp ridge is shorter
 Crown slightly bent distally
 Root is shorter by 1 or 2 mm than
maxillary, apex more sharply pointed

6. Lingual
Aspect
 Crown outline is trapezoidal
 Flatter lingual surface, cingulum is
smooth and poorly developed, marginal
ridges are less distinct.
 Lingual ridge raised at the incisal 3rd
only
 Root appears narrower than labial
aspect

8. Mesial Aspect
 Crown outline is triangular
 Less pronounced cingulum
 Incisal portion is thinner labiolingually,
thus cusp appears more pointed, cusp
ridges more slender
 Tip of cusp more nearly centered over
root
 Developmental depressions are more
pronounced and sometime quite deep

10. Distal
aspect
 Same as mesial aspect, except:
 Less curvature of CEJ
 Less pronounced cingulum
 Less depressions on the root surface

11. Incisal
Aspect
 Mesiodistal diameter less than
labiolingual
 Cusp tip and mesial cusp ridge more
likely to be inclined in a lingual direction