6. Tooth germ - morphological stages in the development of the dental papilla and the dental sac. Functions of the elements of the tooth germ.
Explains how the dental papilla and dental sac develop morphologically in the tooth germ, covering their origin, vascular supply and their roles in forming dentine, pulp, cementum, periodontium and alveolar bone. Includes a table linking each morphological stage from dental lamina to early root stage with its main functional activity, and a table listing each tooth germ component with its embryonic origin, tissue type and adult derivatives.
Topic 6 of 40 in the MU Sofia syllabus for Preclinical Paediatrics (Dental Medicine, Year 3). The free AceMed note covers it in 6 sections, about 328 words (3 min of reading), with 15 flashcards.
In this note
TOOTH GERM - MORPHOLOGICAL STAGES IN THE DEVELOPMENT OF THE DENTAL PAPILLA AND THE DENTAL SAC. FUNCTIONS OF THE ELEMENTS OF THE TOOTH GERM.
Development of the Dental Papilla
Functions of Dental Papilla
Dental Follicle/ Sac
Functions of Dental Sac/ Follicle
Functions of Elements of Tooth Germ
Development of the Dental Papilla
Dental Papilla is the 2nd element of the dental germ below the inner epithelium of enamel organ
Has Mesodermal and Ectomesenchymal Origin
Dental papilla is separated from the enamel organ by a basement membrane
Cells of dental papilla appear as undifferentiated ectomesenchymal cells having uncomplicated structures with all the usual organelles
Blood Vessels appear early in the dental papilla, initially in the central region, along with nerve fibres associated with these vessels
Vessels bring nutrition to the rapidly growing
In the periphery of dental papilla, smaller capillaries are forming
They bring nutrition to the elongating odontoblasts and ameloblasts
Functions of Dental Papilla
Ectomesenchyme of Dental Papilla forms preodontoblasts in the early bell stage and odontoblasts in the late bell stage
Papilla cells are believed to be significant in furthering enamel organ bud formation into the cap and bell stage
Cell density is maintained as the enamel organ grows
Dental papilla gives rise to the dentin and dental pulp
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