Morphology of Human Deciduous Maxillary Central Incisor Tooth

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Morphology of Human Deciduous Maxillary Central Incisor Tooth lecture will describe the fine details of the tooth from all aspects, Rooban Thavarajah

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Morphology of Human Deciduous Maxillary Central Incisor Tooth

  1. 1. Prof. Rooban Thavarajah Tooth Morphology Lecture Series Dr. Rooban Thavarajah
  2. 2. Dr. Rooban Thavarajah Deciduous Dentition Maxillary Central Incisor
  3. 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. 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. 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. 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. 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. 8. INCISAL ASPECT  Straight incisal edge  Bisects crown  Crown's relatively great MD width Dr. Rooban Thavarajah
  9. 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. 10. PULP Dr. Rooban Thavarajah
  11. 11. Add Chronology & Dimension Dr. Rooban Thavarajah

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