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NDBE Part 1: Anatomical Sciences > Oral Cavity > Flashcards

Oral Cavity Flashcards

1
Q

The lateral ant 2/3 of the tongue drains into what lymph node?

A

submandibular

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2
Q

The apex of the tongue drains into what lymph node?

A

submental

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3
Q

The posterior 1/3 and central tongue drain into what lymph node?

A

jugo-digastric node

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4
Q

What drains into the submental nodes?

A

tip of tongue
mandibular inciros/gingiva
anterior lower lip and floor of mouth

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5
Q

what drains into submandibular nodes?

A

anterior palate
lateral lips and floor of mouth
anterior nasal cavity
all teeth except mandibular incisors

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6
Q

The anterior 2/3 of the tongue drains into what lymph node?

A

submandibular and jugulo-omohyoid

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7
Q

The lingual/palatine tonsils drain into what node?

A

jugulo-digastric node

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8
Q

What drains into the retropharyngeal node?

A 
pharyngeal tonsil
paranasal sinuses
nasal cavity
naso/oropharynx
posterior palate
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9
Q

Filiform tastebuds

A

most numerous
do not contain taste buds
avascular

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10
Q

Circumvallate tastebuds

A

serous only within von Ebner’s glands

around sulcus terminals (V)

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11
Q

Foliate tastebuds

A

on lateral surface of tongue

non-functional

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12
Q

Pharyngeal tonsils

A

at nasopharynx
pseudostratifed columnar ciliated
no lymph, sinus or crypts
surrounded by CT and epithelium

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13
Q

Palatine tonsils

A

isthmus of focuses, sides of posterior oropharynx
no sinuses
has crypts and lymph

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14
Q

Lingual tonsils

A

on dorsum of tongue

have lymph follicle each with a single crypt

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15
Q

Parotid gland

A

serous secretions
Stenson’s duct
n: lesser petrosal, otic ganglion, auriculotemporal
a: superficial temporal, transverse facial

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16
Q

Submandibular gland

A 
mixed secretions
Whartons duct
n: chorda tympani, submandibular ganglion
a: facial 
highest volume of secretions per day
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17
Q

Sublingual glands

A

mucous secretions
Rivian ducts
n: chorda tympani, submandibular
a: lingual, sublingual

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18
Q

von Ebner’s glands

A

minor glands in circumvallate papilla

secrete serous fluid

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19
Q

palatine glands

A

mucous

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20
Q

hard palate gland secretions

A

anterior: fat
posterior: mucous

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21
Q

Ant teeth are supplied by what n?

A

ASA

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22
Q

Pre molar and MB root of 1st M are supplied by what n?

A

MSA

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23
Q

What does the PSA n supply?

A

DB and L root of 1st Molar, 2nd and 3rd molar

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24
Q

What n. supply the gag reflex?

A

Affarent: CN IX, nucleus solitarius, spinal trigeminal nucleus

Efferent: CN X, nucleus ambiguous

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25
Q

what causes the change from preameloblasts to ameloblasts?

A

touching of odontoblast processes

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26
Q

Where are Sharpey’s fibers located?

A

bundle bone

cementum

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27
Q

Incremental lines of enamel

A

Line of retzius

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28
Q

Embryonic derivative of enamel

A

ectoderm

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29
Q

Formative cells: enamel

A

enamel organ

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30
Q

What structures come from dental papilla (ectomesenchyme)

A

dentin

pulp

31
Q

What structures come from dental sac (mesenchyme)

A

cementum
alveolar bone
PDL

32
Q

Where is gnarled enamel primarily found?

A

cusp tips

33
Q

Where are enamel tufts primarily found?

A

DEJ to inner 1/3 of enamel

hypo calcified fan-shaped enamel

34
Q

What are perikymata?

A

shallow depressions on enamel surface where lines of retries terminate

35
Q

Where are enamel lamellae primarily found?

A

DEJ to crown surface

hypocalcified enamel

36
Q

What are enamel spindles?

A

short dentinal tubules year the DEJ

trapped odontoblastic processes

37
Q

what are the alternating dark and lines of teeth called?

A

Hunter-Schreger bands

38
Q

What are the growth rings in dentin that run at right angles to the dentin tubules?

A

Von Ebner lines

39
Q

What are contour lines of Owen?

A

adjoining parallel imbrication lines in stained dentin

40
Q

What would you use to distinguish dentin of the crown and dentin of the root?

A

presence of tomes granular layer

near the DEJ

41
Q

What is the primary fiber found in mantle dentin?

A

Korff’s

first dentin formed (CEJ and CDJ)

42
Q

What type of dentin is the majority?

A

intertubular

43
Q

what type of dentin contains dead tracts?

A

coronal

44
Q

What type of dentin contains Tomes granular layer?

A

radicular

45
Q

Where is acellular cementum primarily found?

A

coronal 2/3 of root

thin at CEJ

46
Q

Where is cellular cementum primarily found?

A

apical 1/3 of root
thick at CEJ
compensates for occlusal forces and passive eruption

47
Q

What makes up the enamel organ?

A

IEE
stellate reticulum
OEE

48
Q

At what stage of development does DI and AI occur?

A

Bell

49
Q

What does the dental lamina degenerate to?

A

epithelial rests of Serres

50
Q

IEE from what structures

A

enamel organ: enamel, HERS

51
Q

Tooth with most likely bifurcated root

A

Mandibular canine

52
Q

If the Mand 2nd pre molar splits it’s root which root will it be?

A

Facial

53
Q

Most likely premolar to have 1 root and 1 canal?

A

mandibular 2nd pre

54
Q

largest crown

A

mandibular canine

55
Q

2nd largest crown

A

max central

56
Q

Widest MD

A

○ Overall ­ Mandibular 1st Molar
○ Primary ­ Mandibular 2nd Molar
○ Anterior ­ Maxillary Central Incisor

57
Q

Widest FL

A

○ Overall ­ Maxillary 1st Molar
○ Primary ­ Maxillary 2nd Molar
○ Anterior ­ Maxillary Canine

58
Q

Pulp chamber wider MD > FL

A

Max central

59
Q

Wider L > F

A

○ Primary Maxillary 2nd Molar
○ Permanent Maxillary 1st Molar
○ 3­cusp variety Mandibular 2nd Premolar

60
Q

Longest (cusp tip to root)

A

○ Maxillary Canine (27.0 mm)

○ Mandibular Canine (27.0 mm)

61
Q

Longest root (CEJ to apex)

A

Max canine (17.0 mm)

62
Q

Tallest crown (Inciso-gingivally)

A

○ Mandibular Canine (11.0 mm)
○ Maxillary Central Incisor (10.5 mm)
○ Maxillary Canine (10.0 mm)

63
Q

Smallest anatomical crown

A

Man Central Incisor

64
Q

Most symmetrical anatomical crown

A

○ Anterior ­ Mandibular Central Incisor

○ Posterior ­ Maxillary 2nd Premolar

65
Q

Narrowest MD

A

Mand central

66
Q

Best developed lingual anatomy

A

Max lateral

67
Q

Only LG groove

A

Max lateral

68
Q

Only ML groove

A

Mand 1st PM

69
Q

Only MM Developmental Groove

A

Max 1st PM

70
Q

Only supplemental marginal grooves

A

Max molars

71
Q

Smallest embrasures (equal in size)

A

Facial: between Mandibular Central Incisors
Lingual: between Mandibular Central Incisors

72
Q

Most likely to be congenitally missing

A

3rd Molars

Mand 2nd pre molars

73
Q

Most often impacted

A

3rd Molars
Max canines
Mand 2nd pre molars

NDBE Part 1: Anatomical Sciences (16 decks)

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