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ANATOMY > HEAD AND NECK: ORAL CAVITY > Flashcards

HEAD AND NECK: ORAL CAVITY Flashcards

1
Q

slit like space extending from lips to oropharyngeal isthmus

A

oral cavity

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2
Q

superior and inferior limitations of oral cavity

A

reflections of mucous membrane from lips and cheeks onto gums

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3
Q

roof of oral cavity by

A

hard palate - front
soft palate - behind

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4
Q

floor of oral cavity by

A

ant. 2/3rd tongue
mucous membrane reflection from tongue to gums of mandible

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5
Q

components of oral cavity

A

oral vestibule
oral cavity proper

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6
Q

oral vestibule lies between

A

gums and teeth

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7
Q

oral cavity proper lies

A

within and behind the teeth arch

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8
Q

external communication of oral vestibule thru

A

oral fissure (oral orifice)

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9
Q

where does oral vestibule communicate with oral cavity proper

A

behind 3rd molar (jaws closed)

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10
Q

what structure attaches tongue to the floor

A

frenulum

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11
Q

what is frenulum

A

fold of mucous membrane

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12
Q

what is the small papilla on the floor of the mouth on either side of frenulum

A

orifice of Wharton’s duct of submandibular gland

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13
Q

what is the rounded ridge of mucous membrane extending laterally backwards from the papilla

A

sublingual fold

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14
Q

what forms the sublingual fold

A

protrusion of the sublingual gland

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15
Q

lateral wall of vestibule is formed by

A

cheeks

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16
Q

cheeks are composed of

A

buccinator muscle

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17
Q

outer covering of cheek

A

skin and buccopharyngeal fascia

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18
Q

where does the Stensen’s duct open

A

opposite the 2nd upper molar

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19
Q

nerve supply of the roof of the mouth

A

greater palatine nerve, nasopalatine nerve (maxillary division of CN V/ CN V2)

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20
Q

nerve supply of floor of mouth

A

lingual nerve (mandibular division of CN V/ CN V3)

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21
Q

taste fibers arise from

A

chorda tympani (facial nerve branch)

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22
Q

nerve supply of cheek

A

buccal nerve (branch of CN V3)

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23
Q

layers of tooth

A

outer - enamel
inner- dentin

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24
Q

hardest material in body

A

enamel

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25
Q

main part of tooth

A

dentin

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26
Q

largest dental tissue

A

dentin

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27
Q

soft tissue of tooth

A

pulp

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28
Q

what structures does pulp contain

A

blood vessels & nerves

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29
Q

which structure has the ability to produce dentin

A

pulp

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30
Q

function of the root of tooth

A

secure & anchor tooth to jaw

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31
Q

sets of teeth in human

A

2: deciduous (milk teeth) & permanent

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32
Q

number and types of deciduous teeth

A

20
4 incisors, 2 canines, 4 molars (1&2)

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33
Q

number and types of permanent teeth

A

32
4 incisors, 2 canines, 4 premolars, 6 molars

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34
Q

central incisor (milk) age of eruption

A

6-8 mos

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35
Q

lateral incisor (milk) age of eruption

A

8-10 mos

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36
Q

canines/ cuspids (milk) age of eruption

A

18 mos

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37
Q

molars (milk) age of eruption

A

1st - 1 year
2nd - 2 years

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38
Q

which deciduous teeth erupt first

A

bottom central incisors

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39
Q

which deciduous teeth erupt after the bottom central incisors

A

top 4 teeth

40
Q

permanent incisors age of eruption

A

central - 7years
lateral - 8 years

41
Q

1st permanent molar age of eruption

A

6-7 yrs

42
Q

permanent premolars age of eruption

A

1st - 9yrs
2nd - 10 yrs

43
Q

permanent canines age of eruption

A

11 yrs

44
Q

2nd permanent molar age of eruption

A

12 yrs

45
Q

3rd molar age of eruption

A

17-30 yrs

46
Q

dental condition associated with congenital syphilis

A

hutchinson teeth (notch teeth)

47
Q

notch teeth appearance

A

triangular or peg like permanent incisors and molars

48
Q

hereditary factors associated with enamel hypoplasia

A

amelogenesis imperfecta
ellis-van-creveld syndrome

49
Q

factors associated with enamel hypoplasia

A

prematurity
hypoparathyroidism
high fluoride ingestion
malnutrition
vitamin deficiencies
hypothyroidism
LBW
DM
congenital Syphilis

50
Q

what is supernumerary tooth

A

tooth or odontogenic structure formed in excess

51
Q

when does an impacted tooth occur

A

3rd molar’s awkward growth angle or insufficient room

52
Q

teeth that first arise in the condition neonatal teeth

A

one or two central mandibular incisors

53
Q

structure that divides tongue into anterior and posterior parts

A

sulcus terminalis

54
Q

apex of sulcus terminalis

A

foramen cecum

55
Q

what is foramen cecum

A

embryological remnant of thyroglossal duct

56
Q

papillae present on the tongue dorsum

A

filiform
fungiform
foliate
circumvallate/vallate

57
Q

filiform papillae have whitish appearance due to

A

thick cornified epithelium

58
Q

papillae without taste buds

A

filiform

59
Q

papillae with vascular CT core

A

fungiform

60
Q

how many are circumvallate papillae

A

10-12

61
Q

number of taste buds in foliate papillae

A

~ 1000

62
Q

structure beneath foliate papillae

A

serous gland of von ebner

63
Q

epithelium of tastebuds

A

stratified squamous epithelium

64
Q

posterior part of tongue consists of

A

lingual tonsil

65
Q

posterior part of tongue consists of papillae: true or false

A

false

66
Q

irregular nodular surface of posterior tongue is due to

A

LNs under lingual tonsil

67
Q

what is plica fimbriata

A

fringed mucous fold on ventral tongue

68
Q

general sensation to tongue by

A

lingual nerve (CN V3)

69
Q

motor sensation to tongue by

A

hypoglossal nerve (CN XII)
vagus nerve (palatoglossus muscle)

70
Q

intrinsic muscles of tongue

A

longitudinal & transverse

71
Q

action of intrinsic muscles

A

shape alteration

72
Q

extrinsic muscles of tongue

A

hyoglossus
styloglossus
genioglossus
palatoglossus

73
Q

blood supply of tongue

A

lingual artery (ECA branch)
tonsillar branch of facial artery

74
Q

vein supply of tongue

A

lingual veins(to IJV)
dorsal lingual vein
deep lingual vein
sublingual vein

75
Q

LNs on tip of tongue

A

submental LNs

76
Q

LNs of anterior tongue

A

submandibular
deep cervical

77
Q

LNs of posterior tongue

A

deep cervical

78
Q

an unusually short thick frenulum results in what condition

A

ankyloglossia (tongue tie)

79
Q

what happens in ankyloglossia

A

mobility is reduced

80
Q

hard palate is formed by

A

palatine processes of maxilla
horizontal plate of palatine bones

81
Q

hard palate is bounded by

A

alveolar arches

82
Q

covering of hard palate

A

mucoperiosteum

83
Q

corrugations of mucous membrane on either side of median ridge of hard palate

A

palatine rugae

84
Q

epithelium that covers mucous membrane of hard palate

A

stratified squamous epithelium

85
Q

contents of soft palate

A

aponeurosis
muscles
lymphoid tissue
vessels and nerves

86
Q

posterior projection of soft palate

A

uvula

87
Q

composition of soft palate

A

mucous membrane
aponeurosis
muscles

88
Q

palatine aponeurosis is extended tendon of

A

tensor veli palatini

89
Q

muscles of soft palate

A

tensor veli palatini
levator veli palatini
palatopharyngeus
palatoglossus
uvula/ muscularis uvulae

90
Q

nerve supply of muscles of soft palate

A

pharyngeal plexus

91
Q

pharyngeal plexus composition

A

sympathetic fibers of cervical ganglion
somatic axons (mixed) from vagus (pharyngeal branch), accessory, hypoglossal nerves

92
Q

blood supply of the palate

A

greater palatine (maxillary artery)
ascending palatine (facial artery)
ascending pharyngeal (ECA)

93
Q

nerve supply of the palate

A

greater and lesser palatine nerves (enters thru’ greater and lesser palatine foramina)
nasopalatine (thru incisive foramen)
glossopharyngeal nerve (supplies soft palate)

94
Q

what causes cleft soft & hard palates

A

non-fusion of palatine processes

95
Q

cleft palate repair is done commonly at what age

A

6-12 mos (avg: 9mos)

96
Q

prosthesis used in cleft palate

A

obturator plate

97
Q

problems with bifid uvula

A

trouble moving soft palate (eating, drinking, speaking)
indigestion
distorted speech

ANATOMY (4 decks)

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