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23 Endodontics > Exam 1 Practice > Flashcards

Exam 1 Practice Flashcards

1
Q

which of the following is a factor in poor response due to the pulp having severe injury

A
  1. pulp surrounded by hard unyielding walls
  2. pulp has poor collateral circulation
  3. pulp is a terminal circulation organ

not a factor: pulp has inflammatory cells present

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2
Q

this pulpal structure can help regulate intra pulpal presure by confining pressure increase to a limited area in the pulp

A

ground substance

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3
Q

the place where the inner enamel epithelium (IEE) and the outer enamel epithelium (OEE) meet is called

A

epithelium diaphragm

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4
Q

apical proliferation of this structure will initiate root formation

A

HERS

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5
Q

exposure of dentin to CT results in deposition of

A

cementum

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6
Q

according to your text book, lateral canals are located primariily on

A

apical third of root

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7
Q

a patient complains that when he/she eats anything cold, a sharp transient pain is felt in her front teeth. what nerve fibers are responsible for this sensation?

A

A-delta fibers

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8
Q

what is the most abundant cell of the dental pulp

A

fibroblast

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9
Q

the cell free zone of weil is mostly populated by what

A

capillaries and nerve fibers
NOT large blood vessels

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10
Q

how deep do nerve fibers penetrate into dentin

A

1/3 of way

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11
Q

proliferation of cell rests of malasezes contributes to what

A

formation of apical cysts

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12
Q

what does the textbook describe as negative pressure vessles with opening in its basement membrane and vessel walls and also contain lymphocytes but not red blood cells

A

lymphatic vessels

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13
Q

are propioceptive fibers present in dental pulp

A

NO

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14
Q

what nerve fibers are unmyleniated, slow conducting and have high threshold of excitability

A

C-fibers

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15
Q

what hard tissue is most like bone

A

cementum

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16
Q

what theory explains dentin sensitivity to hot, cold, and sweets

A

hydrodynamic theory

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17
Q

where is the terminal capillary network (TCN) located

A

cell free zone

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18
Q

according to textbook, blood vessels are [smaller of larger] than their corresponding arterioles

A

larger

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19
Q

what layer is not present on a venule

A

smooth

present: endothelial and outer CT layer (adventitia)

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20
Q

which type of collagen is found predominantly in dentin and is secreted by odontoblast

A

type I

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21
Q

what did Kakehashi demonstrate in his experiment with gnotobiotic rats

A

relationship between bacteria and pulpal disease

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22
Q

T/F: the acidity of etchants is what makes this product the most harmful to dental pulp

A

FALSE

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23
Q

what are dead tracts

A

an empty dentinal tubule with no odontoblastic process

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24
Q

according to textbook, which teeth are best able to withstand a traumatic injury (e.g., a blow to tooth)

A

teeth with immature (open) apices

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25
Q

histamine is released by what cells

A

mast cells

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26
Q

use of high speed handpiece without adequate water cooling will produce what

A

pulpal inflammation and dentin desiccation

DOES NOT increase pulpal blood flow

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27
Q

what has the potential to produce the most pain (assume there is pulpal inflammation present)

A

moderate size close carious lesion (no communication)

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28
Q

is tertiary dentin highly mineralized

A

NO

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29
Q

is cilia found on odontoblast

A

NO

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30
Q

T/F: according to textbook, most endodontic irrigants and medicaments are toxic and not biocompatible

A

TRUE

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31
Q

which of the following conditions is visible on a radiograph

a) reversible pulpitis
b) irreversible pulpties
c) pulp necrosis

A

none of the above

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32
Q

spontaneous pain and lingering pain to cold are symptoms of what condition

A

irreversible pulpitis

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33
Q

which could help determine if a tooth is vital or necrotic

A

response to cold

34
Q

what inflammation cells would you expect to see on a pulp that has irreversible non painful pulpitis

A

lymphocytes, macrophages, and neutrophils

35
Q

what is NOT a feature of pain increase of painful irreversible pulpitis

A

pain is usually localized to offending tooth

36
Q

according to textbook, pulpal response to stimuli in both healthy and diseased pulps is a result of what

A

changes in intrapulpal pressure

37
Q

what could you see if a pulp exposure occurred on a tooth with a nectrotic pulp

A

dry space and pus

NO BLOOD

38
Q

T/F: hyperplastic pulpitis is classified as a king of irreversible pulpitis

A

TRUE

39
Q

no response to cold on a tooth with visible pulp space is indicative of

A

pulpal necrosis

40
Q

Howships lacunae are found in what condition

A

internal resorption

41
Q

the pulapl response to cold on a tooth w/ calcific metamorphosis would be similar to that of a tooth with what

A

pulpal necrosis

42
Q

according to textbook, what is not see in calcific metamorphosis

A

complete histologic obliteration

43
Q

a sharp transient pain senation to cold that quickly disappears is related to

A

reversible pulpitis

44
Q

T/F: a normal pulp would be non responsive to hot or cold

A

FALSE

45
Q

this condition containts multinucleated giant cells

A

internal resorption

46
Q

T/F: clinical symptoms directly correlate w/ histologic changes in the pulp

A

FALSE

47
Q

which is not found in hyperplastic pulpitis histology

A

nerve fibers

48
Q

increases in intrapulpal pressure will eventually result in

A

collapse of lymphatic vessels, collapse of venules, and pulpal necrosis

49
Q

T/F: internal resorption is usually identified by its radiographic appearance

A

TRUE

50
Q

debridement of root canal can be [mechanical OR chemical]

A

BOTH

51
Q

the dental papilla gives origin to what structures

A

pulp and dentin

52
Q

the pulp tissue is considered to be what type of CT

A

LCT

53
Q

nervous plexus of Rashkow is most closely associated with what zone

A

cell rich zone

54
Q

from center of pulp towards dentin, list the order in which zones of pulp are arranged

A

core -> cell rich zone -> cell free zone -> odontoblastic layer

55
Q

the cell rich zone is mostly composed of what

A

undiferrentiated mesenchymal cells and fibroblasts

56
Q

is collagen made of polypeptide chains

A

yes

57
Q

do odontoblasts produce both type I and III collagen?

A

NO - just type I

58
Q

are immature collagen fibers referred to as reticular fibers

A

YES

59
Q

what is the matrix for pulp’s ground substance secreted by

A

fibroblasts

60
Q

do nerve fibers penetrate all the way into the DEJ?

A

NO. absent in outer 1/3

61
Q

is there an increase in cellular components of the pulp in aging pulp?

A

NO!!!

62
Q

what is the principal etiology of pulpal disease

A

microbial

63
Q

prostaglandins are deriatives of what substance

A

arachidonic acid

64
Q

in regards to restorations, which is the most harmful to pulp

A

microleakage allowed

65
Q

what precautions should be taken to protect the pulp during operative procedures

A
  1. use of water coolant
  2. light intermittent pressure
  3. good cavity prep design
66
Q

what is the minimal dentin thickness that protects the pulp from most irritants

A

2 mm

67
Q

what is present only in pulp chamber

A

pulp stone

68
Q

what is an incomplete calcification in root canal

A

diffuse calcification

69
Q

what is an extensive calcification of pulp space

A

calcific metamorphosis

70
Q

what is usually associated with periapical lesions

A

pulpal necrosis

71
Q

what is the most abundant cell in the pulp

A

fibroblast

72
Q

what replaces damaged odontoblasats

A

undifferentiated mesenchymal cells

73
Q

what are tall columnar cells

A

odontoblast

74
Q

T/F: the young dental papilla is richly innervated with sensory fibers

A

FALSE

75
Q

T/F: odontoblasts do not differentiate until after ameloblasts differentiate

A

TRUE

76
Q

T/F: rupture of HERS before dentin is formed results in formation of lateral canal

A

TRUE

77
Q

T/F: the apical CDJ is the narrowest part of canal

A

TRUE

78
Q

T/F: the pulp does not contain any lymphatic vesseld

A

FALSE

79
Q

T/F: arterioles enter the pulp thru apical foramen known as EFFERENT blood vessels

A

FALSE

80
Q

T/F: the diameter and density of dentinal tubules increase as depth of preparation increase

A

TRUE

81
Q

T/F: scientific evidence shows that bacteria will only grow underneath a restoration in the presence of microleakage

A

TRUE

23 Endodontics (12 decks)

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