Dental Lamina and Enamel Organ

Question 1

T/F

the 20 localized thickenings in the dental lamina corresponds with the future primary teeth

Answer 1

true

Question 2

T/F

the earliest signs of tooth development are seen during the tenth week in utero

Answer 2

false

Question 3

T/F 
the outer (OEE) and inner (IEE) enamel epithelium are both a continuation of the basal layer of oral epithelium

Answer 3

true

Question 4

t/f

the cap stage begins when the concavity of the cap grows more pronounced

Answer 4

true

Question 5

t/f

primary teeth develop more quickly than permanent teeth

Answer 5

true

Question 6

t/f

the vestibular lamina forms in a lingual direction from the dental lamina

Answer 6

false

Question 7

t/f

the enamel organ is formed from epithelial cells

Answer 7

true

Question 8

t/f

the dental sac is the same as the dental papilla

Answer 8

false

Question 9

t/f

the dental lamina thickens first at the anterior midline

Answer 9

true

Question 10

t/f

without the formation of the vestibular lamina there would be no alveolar ridge

Answer 10

true

Question 11

t/f

the stellate reticulum is dervied from octodermal cells

Answer 11

true

Question 12

t/f

the permanent molars develop from successional lamina

Answer 12

false

Question 13

forms most permanent teeth

Answer 13

successional lamina

Question 14

forms cementum

Answer 14

dental sac

Question 15

forms enamel

Answer 15

enamel organ

Question 16

forms mucobuccal fold

Answer 16

vestibular lamina

Question 17

forerunner of primary tooth germ

Answer 17

dental lamina

Question 18

forms pulp

Answer 18

dental papilla

Question 19

the dental papilla is first seen in the

Answer 19

late bud stage

Question 20

the various layers of the enamel organ DOES NOT

Answer 20

calcification of enamel

Question 21

the enamel organ originates from the

Answer 21

ectoderm

Question 22

the clefting that forms the thickened vestibular lamina eventually becomes a

Answer 22

mucobuccal fold

Question 23

ectodermal dysplasia can cause poor development of which structures

Answer 23

skin
hair
enamel

Question 24

successional lamina forms all except the permanent

Answer 24

molars

Question 25

T/F?
the cells of the IEE change externally and shorten as they develop into ameloblasts. they are responsible for enamel formation

Answer 25

first statement false

second statement true

Question 26

the basal layer of oral epithelium is composed of _______cells

Answer 26

cuboidal cells

Question 27

the stratum intermedium develops in the _______ stage

Answer 27

bell

Question 28

which cells or structures produce ameloblasts

Answer 28

IEE