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Morphology of Human Deciduous Mandibular Central Incisor Tooth
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Morphology of Human Deciduous Mandibular Central Incisor Tooth

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Prof. Rooban Thavarajah's Lecture Series - Morphology of Human Deciduous Mandibular Central Incisor Tooth for First BDS students

Prof. Rooban Thavarajah's Lecture Series - Morphology of Human Deciduous Mandibular Central Incisor Tooth for First BDS students

Published in: Education, Health & Medicine

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  • 1. Prof. Rooban Thavarajah Tooth Morphology Lecture Series Dr. Rooban Thavarajah
  • 2. Dr. Rooban Thavarajah Deciduous Dentition Mandibular Central Incisor
  • 3. BACK GROUND  Similar to deciduous mandibular lateral incisor  Is symmetrical from any surface  Crown is relatively wider MD than in permanent incisors – MD dimension NOT greater than crown length Dr. Rooban Thavarajah
  • 4. LABIAL ASPECT  ~ permanent lateral incisor  root twice length of crown  Mamelons can be present,  Appears wide in comparison to its permanent successor  Root twice length of crown Dr. Rooban Thavarajah
  • 5. LABIAL ASPECT  Proximal outlines are evenly convex - sharp mesioincisal and distoincisal angles  Convexity less than Maxillary counterpart  height of contour - @ contact area in Incisal 3RD  Incisal margin is straight  Labial surface - smooth, lacking developmental depressions, and flatter than labial surface Dr. Rooban Thavarajah
  • 6. PALATAL ASPECT  Cingulum is well defined  Marginal ridges are not so well developed  Lingual fossa - shallow.  Smooth  @ middle, incisal third – flat surface  Lingual fossa  MD @ Labial surface > Lingual surface Dr. Rooban Thavarajah
  • 7. PROXIMAL ASPECT  Mesial aspect  Greater LP than permanent incisors.  Incisal edge is located over root center  Cervical line contour is evenly curved to Ins. edge  Distal aspect - similar to mesial BUT - cervical line exhibits less depth of curvature.  Distal surface a developmental depression Dr. Rooban Thavarajah
  • 8. INCISAL ASPECT  Incisal edge is straight – divides - labial and palatal portions of the crown into equal halves.  MD and LP dimensions are nearly equal – maxillary central incisor it is wider MD  Labial convex, Lingual concave Dr. Rooban Thavarajah
  • 9. ROOT  Single, relatively long, and slender.  Labial and Palatal surfaces are convex  Mesial and distal surfaces are somewhat flattened. Dr. Rooban Thavarajah
  • 10. Dr. Rooban Thavarajah
  • 11. Dr. Rooban Thavarajah