Prof. Rooban ThavarajahTooth Morphology

Lecture Series

Dr. Rooban Thavarajah

Dr. Rooban Thavarajah

Deciduous DentitionMaxillary Canine

General considerations Crown wide MD.

MD is slightly less than the incisocervical measurement.

Add Chronology and Dimension

Dr. Rooban Thavarajah

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

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

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

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

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

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)

Dr. Rooban Thavarajah