Odontogenesis Flashcards
What Week and Stage ?
The Formation of Dental Lamina begins
-Neural Crest Cell Induce oral epithelium to proliferate.
6th Week (Initiation)
What Week and Stage?
Proliferation of both ectodermal and ectomesenchymal cells?
8th week (Bud stage)
What Week and Stage?
Formation of Tooth Germ
1.Enamel Organ
2.Dental Papilla
3.Dental Follicle /Sac
Cap Stage (9th Week)
Surrounding Enamel Organ
Dental Follicle/Sac
Loc. In the Concavity of Enamel Organ
Dental Papilla
Bet. Enamel Organ and Dental Papilla
-gives rise to the SHAPE OF THE CROWN
-makes the DEJ
Membrane Performativa
Primary Enamel Cuticle
-last product of ameloblast
-first protective covering
NASMYTH’S MEMBRANE
Fusion of IEE,OEE,SR, and SI
-SECONDARY Enamel Cuticle
-Forms Junctional Epi.
when united wth Oral Epi.
Reduced Enamel Epithelium
WHAT STAGE OF ODONTOGENESIS?
Starts @DEJ
-Takes 2yrs to Complete
Mineralization Stage
Begins after outline of Crown is established
- signals TOOTH ERUPTION
Root Formation
Union of OEE and IEE
Cervical Loop
Elongation of Cervical Loop
-surrounds majority of Dental Papilla
Hertwig’s Epithelial Root Sheath
-Forms Apical Foramen
-Determines the NO. OF ROOTS
Epithelial Diaphragm
Remnants of Disintegration of HERS
Epithelial Rest of Malassez
Dental Follicle contacts Dentin causing:
Ectomesenchymal Cells
