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Transcript of odontogenesis
1-human tooth development time line.
2-Stages of development:
nerves and blood vessels
the complex process by which teeth form from embryonic cells ,grow and erupt into the mouth cavity.
-primary (deciduous teeth) start to develop
-permanent teeth start to develop at the
Stages of development
1- initiation stage:
-periphery of dental lamina
stellate reticulum (early and late bell stages)
supporting structures of teeth and includes:
Nerves and vascular formation
1- nerves formation:
-starts during cap satge
*blood supply to the tooth decrease by age
form of the tooth
the tooth structure
Abnormalities of morphodifferentiation
abnormalities in the differentiation of dental lamina and tooth germs causes abnormalities in :
Abnormalities of histodifferentation
abnormalities in the formation of the dental hard structure causing disturbances in:
absece of dental lamina due to infection , chemotherapy or syndroms
excessive but organized growth of dental lamina
anormal angulation of the root dut to trauma to tooth bud
1-Ten Cate's Oral Histology, Nanci, Elsevier, 2013, page 135
Nourhan Solaiman Ibrahim 5211289
Nouran Mahomoud Ibrahim 5211287
Noura Ali Ibrahim 5211285