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Development and morphology of primary teeth
- 2. Development of the Child from conception to Three Years Dental Changes
- 3. Development of teeth Germ layer Formative tissue Tooth structure Ectoderm Dental organ ENAMEL Dental papilla DENTIN PULP Mesoderm Dental sac CEMENTUM PERIODONTAL LIGAMENT
- 4. Tooth development Initiation of tooth Odontogenesis-Factors from first arch Ones ability acquired maintained by dental papillary cells
- 5. 6 wks In utero ⢠Tooth Buds ⢠Dental Lamina
- 6. Life Cycle of the Tooth ⢠Growth ⢠Initiation ⢠Proliferation ⢠Histodifferentiation ⢠Morphodifferentiation ⢠Apposition ⢠Calcification ⢠Eruption ⢠Attrition
- 7. Primary Epithelial band/ 6th week Continuous band of thickened epithelium ďą Roughly horse shoe shaped ďą Thickening first seen in ant midline
- 9. Contd thickening of DL in 10 areas of upper/ lower arch Thickenings correspond to position of future primary dentn
- 10. Proliferation ⢠Multiplication of the cells of the initiation stage ⢠Formation of the tooth germ ⢠Cap Stage ⢠formation of the Dental Papilla ⢠Stellate reticulum â Enamel pulp ⢠9-11 weeks
- 12. Histodifferentiation ⢠Bell Stage ⢠Dental papilla ⢠Dental Organ ⢠Dental Sac ⢠Dental Lamina 14th week
- 14. Morphodifferentiation ⢠Advanced bell stage. ⢠Inner enamel epithelium ⢠Formation of Dentin ⢠Fate of the Dental Lamina 18th week
- 16. Apposition ⢠appositional, additive and regular.
- 19. Calcification ⢠Begins at the cusp tips or incisal edges and proceeds cervically
- 21. Lines of Retzius
- 22. Neonatal line
- 23. Stages in tooth growth Morphologic stage physiologic stage Dental lamina and Bud stage Initiation Cap stage Proliferation Bell stage[ Early] Hiisto defferentiation Bell stage {advanced} Morpho defferentitiation Formation of enamel Apposition and dentin matrix
- 27. Formation of Single and Multirooted Teeth
- 28. Formation of multirooted teeth
- 29. Eruption of teeth ⢠Pre-eruptive phase ⢠Eruptive Phase (Prefunctional) ⢠Eruptive phase functional
- 31. Theories of Eruption ⢠Root Formation Theory ⢠Proliferation of the Hertwigâs Epithelial Root Sheath ⢠Proliferation of the connective tissue of the papilla ⢠Simultaneous growth of the jaw ⢠Pressures from muscular action ⢠Apposition and resorption of bone
- 32. Exfoliation of the Primary Tooth ⢠Pressure on the roots by the erupting permanent tooth ⢠Development of osteoclasts ⢠Successive resorption of tooth root, cementum, dentin and adjacent bone due to the action of the osteoclasts.
- 33. Attrition ⢠Normal wearing of the teeth during contact with opposing teeth during occlusion