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Odontogenesis
Dental Anatomy
Question | Answer |
---|---|
What are the 5 phases of odontogenesis? | 1. Induction/Initiation 2. Proliferation 3. Morphodifferentiation 4. Histodifferentiation 5. Apposition/Maturation |
What are the 4 stages of development? | 1. Bud 2. Cap 3. Bell 4. Crown |
What are two phenomena that occur in the cap stage? | 1. The initiation of the permanent tooth dental lamina (secondary dental lamina) begins lingual to the developing primary tooth. 2. The formation of the tooth germ occurs. |
Name the 3 parts of the tooth germ. | 1. Enamel Organ (derived from ectoderm) 2. Dental Papilla (derived from ectomesenchyme) 3. Dental Sac (derived from ectomesenchyme) |
What are the 5 layers of the enamel organ? | 1. Basement Membrane 2. Inner Enamel Epithelium 3. Stratum Intermedium 4. Stellate Reticulum 5. Outer Enamel Epithelium |
What are Glands or Pearls of Serres? | Residual dental lamina cells. They have the ability to form odontogenic cysts in later life. |
Contact between the dental sac cells and the dentinal cells causes the dental sac cells to differentiate into what kinds of cells? | Fibroblasts- form PDL Cementoblasts- form cementum Osteoblasts- form alveolar bone |
What are Rests of Malassez? | Any remnant cells of Hertwig's Root Sheath caught within the PDL. They have the ability to form odontogenic cysts later in life. |