Tooth development

Question 1

when does initiation start?

Answer 1

week 6

Question 2

what does the primary epithelial band give rise to?

Answer 2

dental lamina
vestibular lamina

Question 3

where does the primary epithelial band form?

Answer 3

ectoderm on the maxillary process

Question 4

what does vestibular lamina form?

Answer 4

vestibule between teeth and lips/cheeks

Question 5

what does the growth of the epithelial band trigger?

Answer 5

condensation of mesenchyme in response to FGFB

Question 6

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

Answer 6

differentiation between dental and vestibular lamina

Question 7

when does vestibular lamina begin to break down?

Answer 7

week 9

Question 8

when does the vestibular lamina begin to break down?

Answer 8

week 9

Question 9

what does the vestibular lamina breakdown to become?

Answer 9

labial/ buccal sulcus or vestibule

Question 10

what are the 3 overlapping stages of tooth development?

Answer 10

initiation
morphogenesis
histogenesis

Question 11

what does epithelium (ectoderm) give rise to?

Answer 11

enamel
hyaline layer of the root

Question 12

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

Answer 12

epithelium (ectoderm)

Question 13

what does mesenchyme (ectomesenchyme) give rise to?

Answer 13

dentine
pulp
cementum
periodontium (PDL and Bone)

Question 14

what are stages of the tooth germ?

Answer 14

bud stage
cap stage
bell stage
crown stage
late bell stage

Question 15

what does the tooth germ consist of?

Answer 15

enamel organ
dental papilla
dental follicle

Question 16

what process occurs during bud stage?

Answer 16

cell proliferation

Question 17

when does bud stage occur?

Answer 17

week 8

Question 18

when does cap stage occur?

Answer 18

week 11

Question 19

what processes occur during cap stage?

Answer 19

little morphogenesis

Question 20

when is bell stage?

Answer 20

week 17

Question 21

what processes occur in early bell stage?

Answer 21

morphogenesis
histo differentiation

Question 22

what does the enamel organ become?

Answer 22

inner enamel epithelium
outer enamel epithelium
stellate reticulum
stratum intermedium

Question 23

what does the ectomesenchyme become?

Answer 23

dental papilla
dental follicle

Question 24

what does dental papilla form?

Answer 24

odontoblasts and pulp

Question 25

what does the dental follicle form?

Answer 25

cementum
PDL
bone

Question 26

what type of cells is the IEE?

Answer 26

columnar cells at cusp tips

Question 27

what does the basal lamina of the IEE conform to?

Answer 27

ADJ

Question 28

what is the role of IEE?

Answer 28

forms ameloblasts - enamel

Question 29

what type of cells is stratum intermedium?

Answer 29

flattened cells

Question 30

what is the role of stratum intermedium?

Answer 30

synthesis and transport of to and from IEE

Question 31

what cells are stellate reticulum?

Answer 31

star shaped

Question 32

what is the role of stellate reticulum?

Answer 32

maintenance of shape and protection

Question 33

what cells are OEE?

Answer 33

cuboidal

Question 34

what is the role of OEE?

Answer 34

maintenance of shape and exchange

Question 35

when does the dental lamina breakdown?

Answer 35

week 17

Question 36

what does the dental lamina breakdown to become?

Answer 36

cell rests
cell nests

Question 37

what are the 3 transitory structures?

Answer 37

enamel knot
enamel niche
enamel septum

Question 38

what is the enamel knot?

Answer 38

signalling centre

Question 39

where is the enamel niche seen?

Answer 39

as dental lamina breaks down

Question 40

where is the enamel septum?

Answer 40

between outer and inner EE