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Oral biology ( pbl 2) > facial bones > Flashcards

facial bones Flashcards

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AP® Biology flashcards Biology 101 flashcards
1
Q

period of ovum

A

extends 2 weeks after fertilization. Ovum attaches to uterine wall

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2
Q

Period of embryo

A

from 14th day to 56th day of intrauterine life. Major facial development occurs

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3
Q

period of fetus

A

from 56th day to birth. more excessive facial growth.

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4
Q

from which mass does the cytodifferentiation occur into ecto, meso, and endoderm?

A

inner cellular mass

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5
Q

describe the neurocranium

A

part of skull that holds the brain

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6
Q

descrbe the viscerocranium

A

basically your face

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7
Q

endochondral development of the neruocranium occurs in what bones?

A

sphenoid, temporal, occipital, ethmoid

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8
Q

intramembranous growth of neurocranium occurs in what bones?

A

parietal, occipital, temporal

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9
Q

what bones does the viscerocranium include?

A

frontonasal, median nasal, lateral nasal, nasolacrimal, maxillary, mandibular

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10
Q

hyoid bone is derived from which pharyngeal arches?

A

2 ,3

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11
Q

laryngeal cartilages are derived from which pharyngeal arches?

A

4,6

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12
Q

Which pharyngeal arch does the anterior 2/3 of tongue arise from?

A

1st. it arises from the median and lateral tongue buds of the arch

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13
Q

sensory inntervation of anterior 2/3 of tongue is via..

A

lingual branch of trigeminal

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14
Q

taste of anterior 2/3 is via..

A

chorda tympani of facial nerve

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15
Q

motor innervation of anterior 2/3 of tongue is via….

A

hypoglossal n.

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16
Q

which arch/arches does the posterior 1/3 of tongue come from?

A

3rd, 4th

17
Q

taste innervation of posterior 1/3 is via..

A

glossopharyngeal

18
Q

motor of tongue is via

A

hypoglossal

19
Q

whats the purpose of fontanelles and sutures?

A

bones overlap during birth to assist in the birthing process. They close at various times postnatally.

20
Q

what makes the posterior fontanelle?

A

its a confluence of the lambdoid and sagittal sutures

21
Q

what makes the anterior fontanelle?

A

confluence of sagittal, coronal and frontal sutures

22
Q

who is Dr. Rickets ?

A

hes a doctor that emphasized the relationship of the face and mandible to the cranium

23
Q

Rickets cephalometric analysis analizes what?

A
  1. Pts craniofacial morphology to determine the facial type

2. position and intterrelations of different components of the dento-maxillo-facial strucutres in several fields.

24
Q

endochondral bone growth

A

involves cartilage plates with epiphyses

25
Q

intramembranous bone growth

A

starts with mesenchyme which turns to osteogenic cells which turns to osteoblasts which become surrounded by the newly formed bone and become osteocytes

26
Q

osteoblasts role

A

build bone which is called apposition

27
Q

osteoclasts role

A

resorb bone

28
Q

what kind of tissue is in sutures?

A

dense fibrous tissue

29
Q

whats a fibrous joint called?

A

synarthrosis, This includes sutures and alveolar joints

30
Q

whats a syncondrosis?

A

where the connecting medium is hyaline cartilage

31
Q

name some examples of synchondrosis

A

sterocostal joints, epiphyseal growth plates are temporary synchondrosis

32
Q

where are epiphyseal growth plates found?

A

between diaphyses and epiphyses of long bones. between occipital and sphenoid. between petrous portion of temporal andjugular process of occipital bone

33
Q

5 postnatal synchodrosis

A 
Spheno-frontal
Spheno-ethmoidal 
Spheno-occipital
Inter-spenoidal
Fronto-ethmoidal
34
Q

T/F, sutural syndesmosis grow on one side?

A

F, both sides of the sutre

35
Q

name the two types of cranial sutures

A 
But-end type
beveled type ( grows obliquely)
36
Q

define displacement

A

movement of the whole bone as a unit.

37
Q

primary displacement

A

Bone gets displaced as a result of its own growth,
Growth of the maxilla at the tuberosity region results in pushing of the maxilla against the cranial base which results in the displacement of the maxilla in a forward & downward direction.

38
Q

secondary displacement

A

Bone gets displaced as a result of growth & enlargement of an adjacent bone
Growth of the cranial base causes the forward and downward displacement of the maxilla

Oral biology ( pbl 2) (1 decks)

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