Tooth development Flashcards

1
Q

when does initiation start?

A

week 6

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2
Q

what does the primary epithelial band give rise to?

A

dental lamina
vestibular lamina

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3
Q

where does the primary epithelial band form?

A

ectoderm on the maxillary process

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4
Q

what does vestibular lamina form?

A

vestibule between teeth and lips/cheeks

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5
Q

what does the growth of the epithelial band trigger?

A

condensation of mesenchyme in response to FGFB

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6
Q

what does the primary epithelial band progress to in week 7?

A

differentiation between dental and vestibular lamina

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7
Q

when does vestibular lamina begin to break down?

A

week 9

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8
Q

when does the vestibular lamina begin to break down?

A

week 9

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9
Q

what does the vestibular lamina breakdown to become?

A

labial/ buccal sulcus or vestibule

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10
Q

what are the 3 overlapping stages of tooth development?

A

initiation
morphogenesis
histogenesis

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11
Q

what does epithelium (ectoderm) give rise to?

A

enamel
hyaline layer of the root

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12
Q

what gives rise to enamel and the hyaline layer of the root?

A

epithelium (ectoderm)

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13
Q

what does mesenchyme (ectomesenchyme) give rise to?

A

dentine
pulp
cementum
periodontium (PDL and Bone)

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14
Q

what are stages of the tooth germ?

A

bud stage
cap stage
bell stage
crown stage
late bell stage

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15
Q

what does the tooth germ consist of?

A

enamel organ
dental papilla
dental follicle

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16
Q

what process occurs during bud stage?

A

cell proliferation

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17
Q

when does bud stage occur?

18
Q

when does cap stage occur?

19
Q

what processes occur during cap stage?

A

little morphogenesis

20
Q

when is bell stage?

21
Q

what processes occur in early bell stage?

A

morphogenesis
histo differentiation

22
Q

what does the enamel organ become?

A

inner enamel epithelium
outer enamel epithelium
stellate reticulum
stratum intermedium

23
Q

what does the ectomesenchyme become?

A

dental papilla
dental follicle

24
Q

what does dental papilla form?

A

odontoblasts and pulp

25
what does the dental follicle form?
cementum PDL bone
26
what type of cells is the IEE?
columnar cells at cusp tips
27
what does the basal lamina of the IEE conform to?
ADJ
28
what is the role of IEE?
forms ameloblasts - enamel
29
what type of cells is stratum intermedium?
flattened cells
30
what is the role of stratum intermedium?
synthesis and transport of to and from IEE
31
what cells are stellate reticulum?
star shaped
32
what is the role of stellate reticulum?
maintenance of shape and protection
33
what cells are OEE?
cuboidal
34
what is the role of OEE?
maintenance of shape and exchange
35
when does the dental lamina breakdown?
week 17
36
what does the dental lamina breakdown to become?
cell rests cell nests
37
what are the 3 transitory structures?
enamel knot enamel niche enamel septum
38
what is the enamel knot?
signalling centre
39
where is the enamel niche seen?
as dental lamina breaks down
40
where is the enamel septum?
between outer and inner EE