The document details the characteristics of permanent mandibular canines, including their arch position, universal numbering, dimensions, and general form. It highlights differences in the form and function of mandibular canines compared to maxillary canines, particularly in terms of cusp development and outline dimensions. Additional considerations regarding labial and lingual aspects, as well as root features, are also discussed.

1. Permanent Canines
DR. FAIZA GULFAM

2. Permanent Mandibular Canines

3.  Arch Position
o 3rd from the midline in the mandibular quadrants
o Mesial : Mandibular lateral incisor
o Distal : Mandibular 1st Premolar
 Universal number
o Mandibular right canine : #27
o Mandibular left canine : #22

4.  General form and function
o Similar to maxillary canine
 Eruption age : 9 -10 years

5. Comparison with Maxillary canine
 Dimensions
o Incisocervical length – crown (same or longer)
o Mesiodistal – less
o Labiolingual – less
o Root – shorter
o Crown plus root length - same
 Lingual Surface – less developed
 Cusp – less developed, less sharp
 Labial Surface – less convex
Mand Canine Max Canine

6. Labial Aspect
Pentagonal shape
 Mesial outline
o straight
o mesioincisal angle – obtuse
o Crest of curvature – near mesioincisal angle
o Contact area – incisal third
 Distal Outline
o Shorter than mesial outline
o Convex
o Distoincisal angle – rounded
o Contact area – junction of incisal and middle thirds

7.  Incisal outline
o Cusp
o Distoincisal slope – longer (occludes with
mesioincisal slope of max canine)
 Cervical outline
o Curves evenly towards root
 Other considerations
o Labial ridge
o Developmental depressions
Labial height of contour is located in cervical
third
Mesioincisal
slope
Distoincisal
slope
Cervical line
Labial ridge

8. Lingual Aspect
 Mesial, distal and incisal outline
o Same as labial aspect
 Cervical
o Greater depth of curvature
 Other considerations
o Features are less pronounced as compared to
lingual aspect of maxillary canine
o Slightly narrower mesiodistally than labial
surface
Lingual heigh of contour is located greatest
prominence of cingulum

9. Mesial Aspect
 Labial Margin
o Convex
o Height of contour – cervical third
 Lingual Margin
o Similar to maxillary canine except less cingulum
convexity
 Incisal Margin
o Incisal ridge thinner labiolingually
Labial Lingual

10.  Cervical Margin
o Curves evenly towards incisal
 Other considerations
o Triangular in shape
o Convex labiolingually
o Incisocervically flattening between
cervical line and contact area
o Contact area - incisal third (ovoid)
Labial Lingual

11. Distal Aspect
 Similar to mesial in all aspects except
smaller in dimension
 Contact area and height of contour –
junction of incisal and middle third
(roughly circular)
Labial
Lingual

12. Incisal Aspect
 Similar to maxillary canine
 Mesial – thicker labiolingually
 Cingulum offset to distal
Lingual
Labial

13. Root
 Single, straight and longest in mandibular arch
 Narrower mesiodistally than labiolingually
 Labial and lingual – convex
 Distal and mesial – flattened or concave
 Root concavities or longitudinal grooves – depressions or
concavities present cervioappically
 Cross section – flattened ovoid

14. Variations and Anomalies
 Crown
o Not much variation
 Root
o Irregularly curved
o Bifurcated

15. Questions