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histopath > exam 2 questions > Flashcards

exam 2 questions Flashcards

1
Q

causes pre-odontoblasts to line up align basal lamina

A

fibronectin

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2
Q

found in odontogenic zone

A

odontoblast cell layer
cell free zone
cell rich zone
parietal plexus (raschkow’s plexus)

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3
Q

found in pulpal core

A

fibroblasts
type I and III collagen
extracellular matrix
blood vessels
nerve tissue

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3
Q

each fiber gives ____branches to raschow’s plexus

most fibers are ___________ nerve endings

A

free unmyelinated nerve endings

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4
Q

tomes granular layer is comprised on

A

hypomineralized interglobular dentin

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4
Q

clinical case with cupped occlusal surfaces, defects on lingual enamel and exposed dentin

A

erosion
ask if they eat acidic foods

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4
Q

cementicles can be _____, _____ or ________
and the number of them ______ with increasing age

A

embedded attached free
increase

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5
Q

what causes gingival cysts

A

rests of serres

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6
Q

where is cementum thinnest:

thickest:

A

CEJ

thickest: apex

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7
Q

what fibers give fast sharp localized pain:

dull pain:

A

sharp: a-delta
dull: c fibers

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8
Q

sympathetic branches are from

A

superior cervical ganglion

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9
Q

what nerve provides sensory afferent innervation

A

trigeminal

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10
Q

where are interradicular fibers found:

function:

A

in multirooted teeth
function=resist vertical and lateral force

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11
Q

lateral periodontal cyst arise from

A

epithelial rests of malassez

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12
Q

which is more calcified

peritubular or intertubular

A

peritubular more
intertubular less

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13
Q

mature odontoblasts can make _____ dentin. damage to these cells cause subodontoblastic stem cells to differentiate and make _________

A

secondary dentin

teritary dentin

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14
Q

case study: insert tooth back in alveolar bone
what reparative cell mechanism is most likely to happen?

significant-

slight-

A

alveolar bone secretes cells and fuses cementum to one

significant= ankylosis (severe)
slight- undiff cells from PDL regenerate tissue and PDL restored

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15
Q

case study: pt comes in after crown is plaed and has inflammed gums. there is .5mm distance what do you tell them

A

the biological width has been compromised

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16
Q

T/F: Raschkow’s plexus does NOT form before roots are completely developed

A

false

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17
Q

presence of carbonate apatite core in enamel is more soluble to _____ and what can replace the hydroxyl ions and less susceptible to acid dissolution?

A

acid

fluoride

18
Q

fibers responsible for resisting rotation

A

all PDL fibers

19
Q

resist vertical force

A

apical

20
Q

resist intrusive force

A

oblique

21
Q

resist horizontal and tipping force

A

horizontal

22
Q

resist vertical and lateral force

A

interadicular (between roots)

23
Q

resist tooth separation

A

transseptal

24
Q

resist gingival displacement

A

dentogingival
alveologingival
circumferential
semicircular

25
Q

resist tooth separation and gingival displacement

A

semicircular

26
Q

steps of wound healing

A
  1. undiff cels migrate to area and macrophages/PMN’s remove damaged tissue
  2. fibroblasts/osteoblasts replace damaged tissue
  3. mast cell response -heparin/histamine released
27
Q

patient presents to you with this case
-complain of pain and you deduce that the tooth is mobile
what is accountable for this mobility?

A

due to occlusal trauma, resorption of alveolar bone parallel to long axis of tooth

28
Q

how would a quick inflammatory response occur in the pulp horn

A

thru fenestrated capillaries

29
Q

schwann cells provide myelination for what axons

A

a-delta and a-beta

30
Q

mesial movement of premolar during ortho treatment causes what to mesial and what to distal

A

mesial: mesial compression and resorption of bone

distal: tension and bone deposition

31
Q

T/F
1. dental pulp collagen is the largest EC component making up 25-32%
2. most prevalent is type I and III collagen

A

1 is true and 2 is false because type III is most prevalent

32
Q

sympathetics cause

A

vasoconstriction

33
Q

what are the 2 cementocytes:

A

lacunae and canaliculi

34
Q

what houses cell bodies

A

lacunae

35
Q

what prodives communication and have cytoplasmic projections

A

canaliculi

36
Q

3 things exposed cementum does

A
  1. hypermineralized (prevents reattachment of collagen)
  2. attachment of plaque and calc
  3. endotoxin absorption
37
Q

what is a characteristic of the vermillion border

A

blood vessels, close to surface

38
Q

remove boney thing from buccal surface of 3, you then drain blood from alveolar bone and apply a sheet
-prevents what cells fro healing injury?
what heals area instead?

A

prevents epithelial cells
allows PDL to heal

39
Q

differentiation of cementum is initiated with:

what then induces the differentiation process

A

disruption of hertwig’s root sheath allowing undiff cells to make contact with dentin

dentin matrix growth factors induce process (BMG, FGF, BMP, DMP)

40
Q

T/F
1. dentinogenesis imperfecta is characterized by blueish gray teeth.
2. enamel is affected just like dentin

A
  1. true
  2. false- enamel is not affected but is chipped off
41
Q

in what disease are pulp chambers and canals generally obliterated by defective dentin formation

A

dentinogenesis imperfecta

42
Q

T/F
1. tertiary dentin is released immediately in response to outside forces
2. it is laid down in clean fashion

A
  1. true
  2. false
43
Q

dentin tubules tapered.

largest at:
smallest at:

where are there more dentin tubules?
less?

A

largest at dental pulp
thinnest at DEJ

more at pulpal surface and less at DEJ

44
Q

dental matrix proteins:

A

-Gla proteins
-help mineralize hydroxyapatite
-controlling size of hydroxyapatite crystals

45
Q
A

histopath (13 decks)

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