Development L12 - Hard tissue formation 3 Cementogenesis Flashcards
cementum is a mineralised tissue, where is its orgin?
dental follicle cells derived from ectomesenchymal
cementum is broken down to Acellular and Cellular.
which of these cementum classification thickens with age
cellular cementum
the apical development of the inner and outer enamel epithelium at the cervical loop defines what morphology
root morphology
in order for the cementum to laid down. other stages must be completed first.
what must occur first?
HERS will induce the formation of odontoblast formation through dental papilla cells
in order for the cementum to laid down. other stages must be completed first.
once the odontoblast cells have been formed and laid out, what happens next
odontoblast mature and secrete pre-dentine, which then becomes dentine.
this leads to the breakdown of the basal lamina, along with HERS cells
in order for the cementum to laid down. other stages must be completed first.
after the formation of dentine and the breakdown of the basal lamina what happens next?
HERS cells secrete enamel matrix proteins on to the dentine surface, which then mineralises to form the hyaline layer
in order for the cementum to laid down. other stages must be completed first.
once the hyaline layer has been formed what happens to the HERS cells?
HERS begin to disintegrate
the cells migrate to the follicle of the developing periodontium.
HERS cells will sometimes remain around the root, which could later develop in to what?
cysts
in order for the cementum to laid down. other stages must be completed first.
the disintegration of the HERS cells see the follwing happen next?
induction of follicle cells, migrate to the root surface and form cementoblasts
what induces the follicle cells to migrate to the root surface.
the presence of the epithelial enamel proteins in the hyaline layer induces the follicle cells to migrate.
in order for the cementum to laid down. other stages must be completed first.
once the cementoblasts have been formed what happens next?
the cementoblasts secrete cementum matrix and retreat outwards
as the cementum matrix mineralises, it entraps a particular fibres. what is the name of these fibres.
the entrapment of these fibres are periodontal ligament fibres, known as sharpey fibres.
what role does the hyaline layer have in regards to cementogensis
it induces the formation of cementoblast through the presence of its enamel matrix proteins on its epithelial cells.
cements cementum to tooth
why is the enamel in danger of the dental follicle cells.
the enamel contains small amount of enamel matrix proteins.
the presenc eof these proteins to the dental follicle cells will induce the formation of cementoblast.
this why the enamel is protected by the reduced enamel epithelium.
if a primary tooth undergoes trauma, which can result in the primary tooth root damaging the enamel of the primary tooth. what can this remove from the primary tooth.
remove its Reduced enamel epithelium
