Oral Histology

Question 1

masticatory mucosa has a … submucosa

Answer 1

thin

Question 2

lining mucosa has a … submucosa

Answer 2

thick

Question 3

is the neonatal line in dentin or enamel

Answer 3

both

Question 4

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

Answer 4

striae of retzius

Question 5

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

Answer 5

perikymata

Question 6

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

Answer 6

enamel tufts

Question 7

… are odontoblasts processes that extend into the enamel

Answer 7

enamel spindles

Question 8

where is gnarled enamel located?

Answer 8

cusp tips and incisal edges

Question 9

which starts forming first ? dentin or enamel

Answer 9

dentin

Question 10

enamel matrixx is …% mineralized immediately

Answer 10

30

Question 11

final hardness of enamel is …

Answer 11

96%

Question 12

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 …..

Answer 12

reduced enamel epithelium (nasmyths membrane)

Question 13

enamel hypoplasis is due to a decrease in the

Answer 13

amount of matrix

Question 14

enamel hypomineralization is caused by a lack of sufficient

Answer 14

mineral incorporation into the matrix

Question 15

fluorosis is a type of … and results in ….

Answer 15

hypoplasia

pitting/mottling/brown pigmentation

Question 16

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

Answer 16

scalloped

Question 17

dentin contains less hydroxyapatite than enamel but more than

Answer 17

bone and cementum

Question 18

unlike amelogenesis, dentinogenesis occurs

Answer 18

throughout the life of an individual

Question 19

type 1 dentinogenesis is associated with … and …

Answer 19

osteogenesis imperfecta

blue sclera

Question 20

type 3 dentinogenesis imperfecta is very … and is called…

Answer 20

rare

brandywine

Question 21

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

Answer 21

mantle

circumpulpal

Question 22

neonatal lines in dentin are called

Answer 22

lines of owen

Question 23

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

Answer 23

von ebner

Question 24

… dentin needs a stimulus to be made

Answer 24

tertiary

Question 25

tertiary dentin can be ... or ...

Answer 25

reactive | reparative

Question 26

reparative tertiary dentin is laid down by?

Answer 26

differentiated mesenchymal odontoblast (brand new odontoblast)

Question 27

reactive tertiary dentin is laid down by?

Answer 27

existing odontoblast

Question 28

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

Answer 28

Hertwig's epithelial root sheath

Question 29

intertubular dentin is ...

Answer 29

normal mineralized dentin

Question 30

intratubular dentin is ... | and it contains no...

Answer 30

highly mineralized sheath that is added to the inside walls of the tubule type 1 collagen

Question 31

... is the mixture of normal and hypomineralized dentin

Answer 31

globular dentin

Question 32

.... is hypomineralized dentin

Answer 32

interglobular

Question 33

pulp and dentin are both from ... cells

Answer 33

neural crest

Question 34

major cell type of PDL

Answer 34

fibroblast

Question 35

pdl inserts on

Answer 35

bundle bone

Question 36

filiform papillae are most ... and do not have ...

Answer 36

numerous | taste buds

Question 37

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

Answer 37

mushroom | taste buds

Question 38

.... 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

Answer 38

circumvallate papillae

Question 39

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

Answer 39

foliate papillae

Question 40

whats stimuli do taste buds react to

Answer 40

``` sweet salty bitter sour umami ```

Question 41

serous acini have .... granules

Answer 41

zymogen

Question 42

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

Answer 42

bicarb | Chloride

Question 43

striated ducts reabsorb.... and add...

Answer 43

sodium | potassium