Oral and Craniofacial Development 2 Flashcards

1
Q

what does the primary palate form from

A

intermaxillary segment

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2
Q

what do the palatal shelves form from

A

maxillary process

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3
Q

fusion of palatal shelves form the:

A

secondary palate

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4
Q

primary palate fuses with:

A

secondary palate

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5
Q

what else is forming at the same time of the palate

A

nasal cavity

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6
Q

areas of specialized thickened ectoderm develop at the surface of the embryo to form what

A

placodes

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7
Q

the tissue around the nasal placodes undergoes growth, and the placodes become submerged, forming depressions called what

A

nasal pits

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8
Q

each nasal pit invaginates and expands to form a what

A

nasal sac

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9
Q

each developing nasal cavity is initially separated from the oral cavity by the primary palate and a piece of tissue called the what

A

oronasal membrane

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10
Q

rupture of the _______________ opens up and the developing nasal cavities to the developing oral cavity

A

oronasal membrane

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11
Q

what occupies the developing nasal cavity

A

tongue

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12
Q

after rupture of the oronasal membrane, the developing tongue occupies the what

A

primitive nasal and oral cavities

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13
Q

the oral and nasal cavities become separated by the what

A

palate

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14
Q

while the palate is fusing, what else is also developing

A

nasal septum

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15
Q

the nasal septum grows down from the ___________ and fuses with the palate

A

roof of the nasal cavity

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16
Q

the nasal septum divides the nasal cavity into what

A

right and left sides

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17
Q

the mandible and maxilla are derived from neural crest cells from the ______________

A

first branchial arch

18
Q

begins during the embryonic period and continues through childhood and adolescence

A

ossification

19
Q

the jaw develops mostly by what

A

intramembranous ossification

20
Q

bone tissue replaces a hyaline cartilage template of the bone-to-be

A

endochondral ossification

21
Q

bone forms within mesenchyme without replacing a cartilage template

A

intramembranous ossification

22
Q

the mandible develops from the _____________ of the first branchial arch

A

mandibular process

23
Q

what is bone formation associated with

A

meckel’s cartilage
inferior alveolar nerve
developing teeth
muscles of mastication

24
Q

formed by neural crest cells in branchial arch 1

A

meckel’s cartilage

25
branches of ________ grow right next to meckel's cartilage
CN V3
26
what does CN V3 divide into between the posterior 1/3 and the anterior 2/3 of meckel's cartilage
lingual branch and inferior alveolar branch
27
anteriorly, the inferior alveolar branch divides into what
mental branch and incisive branch
28
formation of the __________ occurs lateral to meckel's cartilage
mandible
29
starts within each mandibular process near the split of the inferior alveolar nerve into the mental and incisive branches
ossification
30
bone will develop lateral to and around meckel's cartilage _____________
anteroposteriorly
31
the ________ eventually encloses the meckel's cartilage and most of the cartilage degenerates
bone
32
the bone will also eventually enclose the ___________ and most of the ____________
incisive nerve inferior alveolar nerve
33
the pattern of ossification produces the _____________ through which the mental nerve passes
mental foramen
34
the bilateral centers of ossification will remain separated until they fuse at the ____________ until shortly after birth
mandibular symphysis
35
ossification will continue posteriorly until it reaches the point where the CN V3 branches into _________ and ______________ nerves. here the _______ will form
lingual and inferior alveolar nerves ramus
36
secondary centers of ossification contribute to the formation of all parts of the __________
mandible
37
most of meckel's cartilage will degenerate but the posterior part will remain to form the ________ and _______ of the inner ear
incus and malleus
38
the maxilla develops from the _____________ of the first branchial arch
maxillary process
39
bone formation is associated with what
infraorbital nerve developing teeth nasal septal cartilage
40
ossification begins at the termination of the __________ superior to the area where the primary maxillary canines will develop
infraorbital nerves
41
ossification then spreads from these primary centers, and merges with ______________ of ossification that arise in different parts of the bone-to-be
secondary centers
42
each ___________ starts as a groove on the nasal aspect and does not fully develop until after birth
maxillary sinus