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NBDE part 1 > Oral Histology > Flashcards

Oral Histology Flashcards

1
Q

masticatory mucosa has a … submucosa

A

thin

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2
Q

lining mucosa has a … submucosa

A

thick

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3
Q

is the neonatal line in dentin or enamel

A

both

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4
Q

… are striations in enamel that represent rhythmic growth of the enamel

A

striae of retzius

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5
Q

at the surface of a tooth, the lines of retzius end as a series of parallel, shallow grooves called

A

perikymata

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6
Q

… are hypomineralized ribbon-like structures that run longitudinally to the tooth axis and extend from the DEJ and 1/3 into the enamel

A

enamel tufts

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7
Q

… are odontoblasts processes that extend into the enamel

A

enamel spindles

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8
Q

where is gnarled enamel located?

A

cusp tips and incisal edges

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9
Q

which starts forming first ? dentin or enamel

A

dentin

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10
Q

enamel matrixx is …% mineralized immediately

A

30

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11
Q

final hardness of enamel is …

A

96%

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12
Q

when maturation is complete, the ameloblasts def-differentiate, and together with the remnants of stratum intermedium, the stellate reticulum, and the outer enamel epithelium, they form the …..

A

reduced enamel epithelium (nasmyths membrane)

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13
Q

enamel hypoplasis is due to a decrease in the

A

amount of matrix

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14
Q

enamel hypomineralization is caused by a lack of sufficient

A

mineral incorporation into the matrix

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15
Q

fluorosis is a type of … and results in ….

A

hypoplasia

pitting/mottling/brown pigmentation

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16
Q

the boundary between enamel and dentin (the DEJ) is characterized as a … border

A

scalloped

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17
Q

dentin contains less hydroxyapatite than enamel but more than

A

bone and cementum

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18
Q

unlike amelogenesis, dentinogenesis occurs

A

throughout the life of an individual

19
Q

type 1 dentinogenesis is associated with … and …

A

osteogenesis imperfecta

blue sclera

20
Q

type 3 dentinogenesis imperfecta is very … and is called…

A

rare

brandywine

21
Q

primary dentin is made up of … dentin which is closest to the mantle layer and …. dentin which is the remainder

A

mantle

circumpulpal

22
Q

neonatal lines in dentin are called

A

lines of owen

23
Q

in dentin there are lines of … which are lines formed by changes in orientation of collagen fibers every 5 days

A

von ebner

24
Q

… dentin needs a stimulus to be made

A

tertiary

25
Q

tertiary dentin can be … or …

A

reactive

reparative

26
Q

reparative tertiary dentin is laid down by?

A

differentiated mesenchymal odontoblast (brand new odontoblast)

27
Q

reactive tertiary dentin is laid down by?

A

existing odontoblast

28
Q

the # of roots, root formation and shape of root come from?

A

Hertwig’s epithelial root sheath

29
Q

intertubular dentin is …

A

normal mineralized dentin

30
Q

intratubular dentin is …

and it contains no…

A

highly mineralized sheath that is added to the inside walls of the tubule

type 1 collagen

31
Q

… is the mixture of normal and hypomineralized dentin

A

globular dentin

32
Q

…. is hypomineralized dentin

A

interglobular

33
Q

pulp and dentin are both from … cells

A

neural crest

34
Q

major cell type of PDL

A

fibroblast

35
Q

pdl inserts on

A

bundle bone

36
Q

filiform papillae are most … and do not have …

A

numerous

taste buds

37
Q

fungiform are .. .shaped and are mostly at the tip of the tongue and do have …

A

mushroom

taste buds

38
Q

…. are large and dome shaped and just anterior to the sulcus terminalis. surrounded by moat like invaginations that do have taste buds and they have ducts of the lingual salivary glands (of ebner) that empty their serous secretions into the moat

A

circumvallate papillae

39
Q

…. are at the lateral endge of the tongue, contain taste buds

A

foliate papillae

40
Q

whats stimuli do taste buds react to

A 
sweet 
salty
bitter
sour
umami
41
Q

serous acini have …. granules

A

zymogen

42
Q

intercalated ducts secrete,,, and absorb ,,,,

A

bicarb

Chloride

43
Q

striated ducts reabsorb…. and add…

A

sodium

potassium

NBDE part 1 (9 decks)

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