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23 oral diagnosis > 5 - Cariology > Flashcards

5 - Cariology Flashcards

1
Q

is dental caries an infectious, communicabe, disease process

A

yes

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2
Q

what is a post-eruptive disease process

A

dental caries

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3
Q

microorganisms (for caries) are acquired from where

A

the environment (mainly infant caregivers)

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4
Q

3 main factors of caries

A
  1. tooth
  2. dental plaque
  3. diet (refined carbs)

without all three, caries is not possible

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5
Q

influences that affect the 3 main factor of caries

A

time, fluoride, and saliva

also: education, socioeconomic status, and behavior

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6
Q

what are the parts of microbial biofilm

A
  1. acquired pellicle
  2. bacteria
  3. matrix
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7
Q

what is a coating derived from saliva and deposits shortly after eruption

A

acquired pellicle

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8
Q

what is acellular and consists of salilvary glycoproteins

A

acquired pellicle

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9
Q

how long does it take for acquired pellicle to mature

A

7 days

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10
Q

what is the acquired pellicle colonized by

A

oral bacteria

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11
Q

where are bacteria most abundant

A

stagnant areas (proximal surfaces, pits, fissures)

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12
Q

what bacteria colonize as plaque matures and oxygen penetration decreases (gram negaive rods and cocci)

A

anaerobic bacteria

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13
Q

what are organic and inorganic components derived from bacteria

A

matrix

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14
Q

what its a major component of matrix

A

polysaccharides

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15
Q

what are minor components of matrix

A

salivary and serum proteins and glycoproteins

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16
Q

what is the process of bacterial metabolism - causes acidogenesis (lactic acid)

A

anaerobic glycolysis

17
Q

what is pH change in plaque metabolism

A

7.0 to 4.5

18
Q

when does enamel begin to demineralize

A

5.0 to 5.5

19
Q

when eating, the drop in pH occurs for how many minutes

A

30 minutes

20
Q

T/F: quality of food is more important than frequency

A

FALSE! frequency is more important than quality

21
Q

what are secondary (recurrent) caries

A

on tooth surface at margin of existing restoration. caused by same bacteria that cause primary caries. this is the most common reason for restoration replacement

22
Q

what are the 3 stages of carious lesion development

A
  1. incipient - can be arrested or reversed
  2. demineralization to and past DEJ
  3. overt or frank - cavitation present, operative intervention necssary
23
Q

what do pit and fissure caries look like when spread

A
24
Q

what do interproximal caries look like hwen spread

A
25
Q

do all white spot lesions lead to cavities

A

YES

26
Q

what are zones of incipient lesion from surface

A
  1. surface zone
  2. body of lesion
  3. dark zone
  4. translucent zone
27
Q

what zone:

Deepest part of the lesion.
Advancing part of the lesion.
Slight demineralization.
1% pore space.

A

translucent zone

28
Q

what zone:

Pore space of 2-4%.
Deepest part of the lesion that can be
re-mineralized.

A

dark zone

29
Q

what zone:

Pore space of 5-25%
Remanents of enamel crystals
still maintain orientation in the
protein matrix.

A

body of lesion

30
Q

what zone:

Pore space 1%
Can be re-mineralized.
If no re-mineralization occurs, the
surface zone becomes
undermined and collapses. The
lesion is then no longer incipient.

A

surface zone

31
Q

what are the five zones of carious dentin

A
  1. destruction - closest to DEJ
  2. penetration
  3. demineralization
  4. translucency
  5. reactionary dentin or sclerotic
32
Q

what is deposited y the pulp in response to irritation (amorphous)

A

reactionary dentin

33
Q

what are non-vital calcific tracts of dentinal tubules

A

sclerotic tubules

34
Q

clinical appearance of active lesion

A

white, chalky or dull, rough, porous

35
Q

clinical appearance of inactive lesion

A

white to black, shiny, smooth, hard

36
Q

if lesion is shiny and hard, do you need to remove it?

A

nO

37
Q

what are the cariogenic bacteria

A

s. mutans gram +
l. casei gram +

38
Q

what is the primary colonizer of acquired pellicle

A

s. mutans

23 oral diagnosis (13 decks)

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