Tooth development Flashcards
on what day does the primary epithelial band form?
day 37
days that dental lamina and vestibular lamina subdivide
42-48
are anterior teeth more advanced in development than posterior ones?
yes
how many centers of proliferation per dental lamina?
10
what happens to peripheral cells i cap stage?
they become cuboidal or columnar
enamel organ secretes hydrophilic glycoaminoglycans during the
cap stage
tooth germ=
enamel organ, dental papilla and dental follicle
what separates outer enamel epithelium from ectomesenchyme?
thick basement membrane
what cells lie over inner dental epithelium
stratum intermedium cells
Inner dental epithelium cells are columnar and elongate prior to producing
enamel
during the bell stag the tooth loses connection to the oral cavity, ad
dental lamina and lateral lamina degenerate
where do permanent teeth arise
from dental lamia in LINGUAL side of baby teeth.
later in development what interferes with diffusion of nutrients to enamel organ?
layer of dentin. The stellate reticulum must collapse to compensate
late cap to bell stage is important for what?
histodifferentiation
where does mitotic activity of inner enamel epithelium cease?
where dentin will first form
When do principal fibers of PDL start to form?
prior to onset of eruption
When are PDL fibers fully cuntional?
when the tooth is fully erupted but before root is done forming
When the tooth erupts the reduced enamel epithelium and oral epithelium…
fuse
