The lecture series by Dr. Rooban Thavarajah focuses on the morphology of deciduous dentition, particularly the maxillary central incisor, emphasizing similarities with its permanent counterpart. Key features include a greater mesiodistal crown width than incisocervical height, a smooth labial surface without mamelons, and a more prominent cingulum and marginal ridges. The tooth's root is single, round, and longer relative to the crown compared to the permanent incisor.

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

2. Dr. Rooban Thavarajah
Deciduous Dentition
Maxillary Central Incisor

3. Introduction
 Very similar to its permanent successor.
 Same arch position, function, and shape.
 No mamelons in newly erupted teeth.
 Only anterior tooth of either dentition, in
which the MD crown width is greater than
the incisocervical crown height.
Dr. Rooban Thavarajah

4. Labial Aspect
 MD > Cervicoincisal length ( OPPOSITE for Permanent)
 Smooth straight incisal edges
 Root cone shaped with uniform taper
 No mamelons
 Mesial & distal outlines are more convex than in the
permanent central.
 Smooth, convex labial surface - no developmental
depressions or imbrication lines.
Dr. Rooban Thavarajah

5. LABIAL ASPECT
 Incisal outline is relatively flat.
 The distoincisal angle is slightly
more rounded than the
mesioincisal angle.
 The cervical line curves evenly
toward the root.
Dr. Rooban Thavarajah

6. PALATAL ASPECT
 Cingulum is more prominent
 Cingulaum extends farther incisally
than on the permanent tooth.
 Marginal ridges are also more
prominent
 Fossa is deeper.
Dr. Rooban Thavarajah

7. PROXIMAL ASPECT
Dr. Rooban Thavarajah
 Similar to that of the permanent tooth
 In deciduous tooth - Mesial
 Relatively wider labiolingually
 Cervical line exhibits less curvature incisally.
 Distal aspect
 Similar to mesial aspect, except that the cervical
line curvature is less.

8. INCISAL ASPECT
 Straight incisal edge
 Bisects crown
 Crown's relatively
great MD width
Dr. Rooban Thavarajah

9. ROOT
 Single root
 Round and tapers evenly to the apex.
 Very similar to permanent especially in
cross section
 It is longer, relative to crown length, than in
the permanent central.
Dr. Rooban Thavarajah

10. PULP
Dr. Rooban Thavarajah

11. Add Chronology &
Dimension
Dr. Rooban Thavarajah