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BDS2 BAMS Oral Biology > Dental Development > Flashcards

Flashcards in Dental Development Deck (71)
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1

What are the 3 embryonic layers

 ectoderm
 mesoderm
 endoderm

2

What is tooth enamel derived from

ectoderm

3

What is all parts of the teeth and supporting structures (except enamel) derived from

ectomesenchymal cells

4

What are ectomesenchyme

Ectomesenchyme is part of the ‘neural crest’ that develops beside the primitive nervous system (ectoderm)

5

What does tooth develop from

tooth germ

6

What is the fourth cell type that forms between the ectoderm and neural tube

ectomesenchyme

7

What does neural crest tissue migration form

the jaw and face

8

What does failure of the migration of ectomesenchymal cells result in

will generate a number of pathological syndromes – deficiency in the formation

9

What is a condition that is due to failure of ectomesenchymal cells

mandibulofacial dysostosis.

10

What are the stages in tooth development

 initiation
 morphogenesis
 cytodifferentiation
 matrix secretion
 root formation

11

What is present in tooth initiation

stomodaeum and maxillary & mandibular process

12

What is the stomodaeum

a space and it is this space that will form the mouth

13

When does the primary epithelium band form

approximately 6 weeks IUL

14

What does the primary epithelial band appear as

the thickening in the epithelium of the embryonic mouth (stomodaeum)

15

What will the primary epithelial band eventually form

dental lamina

16

When does the dental lamina appear

Appears approximately 7 weeks IUL

17

What is the 2 parts that the jaw is divided into

vestibular lamina
dental lamina

18

What is the vestibular lamina

will break down to form the buccal sulcus

19

What is the dental lamina

enamel organ develops from it

20

What is the shape of the dental lamina

horse shoe shaped

21

Where are the tooth germs formed

spaces in the DL

22

When does the bud stage occur

Occurs approximately 8-10 weeks IUL

23

What happens in the bud stage

The dental lamina thickens into a ‘bud’ stage enamel organ

24

What happens to the ectomesenchymal cells surrounding the dental lamina

he ectomesenchymal cells surrounding condensate and this is called the dental papilla

25

What holds the structure of the tooth - dental papilla or enamel organ

enamel organ

26

When does the cap stage occur

It occurs at approximately 11 weeks IUL

27

What happens in the cap stage

The enamel organ forms a cap on top of the dental papilla
Consists of 2 epithelium

28

What are the 2 epithelium in the cap stage

 external enamel epithelium
 internal enamel epithelium

29

Where do the EEE and IEE meet

These two meet at the cervical loop which is the reference for the formation of the root

30

When does the bell stage occur

at approximately 14 weeks IUL