Basic Oral Histology'' Biology '' Course: From A - Z Part 1

ORAL HISTOLOGY COURSEIntroduction and terminology The process of tooth development begins around week 5-6. Intrauterine life. primitive oral cavity- stomodeum -Tooth Development ( Odontogenesis ) The Development Of The Tooth Involves Many Complex Biologic Processes, Including 1- Ectoderm - Oral Epithelial (Stratified Squamous) 2- Ecto-mesenchymal (mesoderm C.

T +Neural Crest). From This Interaction 1- 20 Deciduous - Labial to the dental lamina 2- 32 Permanent Teeth Develop. lingual to the dental lamina The Fundamental Developmental Process Is Similar For All Teeth.

Crown formationDEVELOPMENTAL STAGES 1- Initiation stage (dental lamina ): It is formed by proliferation of the basal cell layer of the oral epithelium in the underlying mesenchyme forming a band called tooth band or dental lamina. - Germal Layer - On The U Future Jaws 2- ( Bud stage ) - initiation stage: This stages starts at the beginning of eight week of prenatal development. It involves extensive proliferation of the dental lamina into buds.

In each future jaw, ten oval buds start to penetrate into the surrounding ectomesenchyme. that will later form the primary teeth. 3- Cap Stage ( Proliferation stage ) This stage starts between the ninth and tenth week of prenatal development.