Dr. Rooban Thavarajah's lecture on maxillary canine morphology outlines the distinguishing features of deciduous dentition, emphasizing the crown's dimensions and unique cusp structure. Key points include the tooth's convex surfaces, prominent cingulum, and specific measurements related to mesial and distal slopes. The document also contrasts the morphology with incisors, noting variations in the cervical line and crown height.

1. Prof. Rooban Thavarajah
Tooth Morphology
Lecture Series
Dr. Rooban Thavarajah

2. Dr. Rooban Thavarajah
Deciduous Dentition
Maxillary Canine

3. General considerations
 Crown wide MD.
 MD is slightly less than the incisocervical
measurement.
 Add Chronology and Dimension
Dr. Rooban Thavarajah

4. Dr. Rooban Thavarajah
Maxillary Canine
 Does not resemble incisor (except root)
 MD constricted @ cervix
 Mesial, Distal surface appear convex
 A single well developed sharp cusp
 Long mesial & Short distal slope
 Line joining contact areas bisect line drawn
from cervix to tip of cusp
 Roots – Long, slender, tapering and twice
crown length

5. LABIAL ASPECT
 Mesial & distal outlines bulge convexly to
cervical line.
 The height of contour - at level of contact area.
 Mesial- distal contact areas - located - same
level incisocervically (@ different levels
permanent canine)
Dr. Rooban Thavarajah

6. LABIAL ASPECT
 Mesioincisal slope is normally longer than
distoincisal slope
 Cervical line - even curvature apically.
 No developmental depressions or
imbrication lines in root surface
Dr. Rooban Thavarajah

7. PALATAL ASPECT
 Prominent cingulum, lingual & marginal
ridges.
 MP and DP fossae are present
 A tubercle at cusp/ Lingual ridge
 Root – a distal inclination
Dr. Rooban Thavarajah

8. PROXIMAL ASPECT
 Labiolingually tooth is thicker
 Cervical line depth is less as compared to
incisors and even less in distal aspect
 Mesial - Similar to incisor except
 Crown height – greater
 Cervical third greater Labiopalatally
 Distal
 Reverse of mesial side
Dr. Rooban Thavarajah

9. Dr. Rooban Thavarajah
 Incisal edge
 Diamond shaped
 Tip of cusp distal to centre of crown
 Mesial slope longer than distal slope ( X of
Lower canine, similar to permanent teeth)

10. Dr. Rooban Thavarajah