CFD6- Development of the face and maxilla Flashcards Preview

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Flashcards in CFD6- Development of the face and maxilla Deck (49)
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1

what is the front-nasal process?

Prominence in the upper facial area at the most cephalic end of the embryo

2

what is the cephalic end?

Head end of a structure such as the trilaminar embryonic disc

3

what are the mandibular processes?

Processes of first branchial arch that fuse at the midline to form mandibular arch

4

what is the mandibular arch?

Lower dental arch with mandibular teeth or the 1st Branchial/Pharyngeal arch inferior to the stomodeum in the embryo

5

what are the maxillary processes?

Prominence from mandibular arch that grows superiorly and anteriorly on each side of the stomodeum of the embryo

6

what is the maxillary arch?

Upper dental arch in which the maxillary teeth form

7

what is the nasal placode?

Placodes that develop into olfactory organ for the sensation of smell located in the mature nose

8

what is the placode?

Area of ectoderm found at the location of the developing special sense organs on the embryo

9

when does development of the face start?

4 weeks

10

where does the face begin to develop?

squeezed between the brain and developing heart

11

what layers are involved in facial development?

all 3 embryonic layers

12

what are the five facial processes?

-Frontonasal prominence
-2 paired maxillary
-2 paired mandibular

13

what is "fusion"?

-"fusion" of prominences by elimination of furrow
-between medial nasal prominences

14

what is true fusion?

True fusion of separate processes between medial nasal prominence and maxillary process

15

what is a result if true fusion does not occur?

cleft palate

16

what membrane disintegrates in the stomodeum?

temporary membrane

17

what chamber is formed?

oro-nasopharyngeal chamber

18

what is the primary palate?

– from the fused medial nasal prominence (intermaxillary segment)
– does not separate oral and nasal cavities - demarcates

19

where are placodes located?

all on the same level

20

How do the eyes move during development of the face?

move from the side of the face inwards

21

How does the maxillary process develop?

develop across and fill the gap

22

at 7 weeks , what stage is development at?

true fusion has occurred and this is the flat face

23

what happens at 10 weeks?

all structures are fully formed and now cartilage and bone will be laid

24

what has formed at the 4th week?

– primitive stomodeum bounded by
– FNP, max. and mand. process
– nasal placodes, develop into nasal pits

25

what has formed at the 5th week?

– nasal pit surrounded by lateral + medial nasal
prominence

26

what has formed at the 6th and 7th week?

Medial nasal prominences fuse together and fuse with maxillary processes

27

what is the frontonasal contributions to the face?

forehead, bridge of nose

28

what is the medial nasal contributions to the face?

philtrum of the lip, crest and tip of nose

29

what is the lateral nasal contributions to the face?

alae of nose

30

what is the maxillary contributions to the face?

cheeks, lateral upper lip