Lecture 3 - Microbiology of Dental Caries Flashcards Preview

Pedo Final > Lecture 3 - Microbiology of Dental Caries > Flashcards

Flashcards in Lecture 3 - Microbiology of Dental Caries Deck (22):
1

site of most common caries?

pit and fissure caries

2

diet-related caries is associated with?

smooth surface and proximal caries

3

caries found in patients with exposed root surface?

root caries

4

caries found at restoration margins?

secondary caries

5

T/F when bodys remineralization cant keep up with bacterial acid production, net loss of tooth structure

T

6

T/F bacteria living in biofilms on surface of tooth produce lactic acid from glycolysis of sugars

T

7

T/F tooth surface is stabilized by pellicle proteins.
initial demineralization is above the surface, leaving a thin shell of enamel overlying the body of lesion.

T
F - subsurface initial demineralization

8

occurs when subsurface demineralization becomes too severe or extraordinary force is applied to surface

cavitation

9

as long as surface is retained, ________ of lesion is possible.

remineralization

10

T/F biological repair is always possible

F - not possible once cavitation occurs

11

T/F virgin enamel is stronger than remineralized tooth structure because of incorporation of fluoride into hydroxyappatite crystal structure

F - remineralized tooth structure is stronger

12

properties of caries causing bacteria
1
2
3
4

1 attach and form biofilm
2 produce acid (ACIDOGENIC)
3 survive acid (ACIDURIC)
4 continue to produce acid at low pH

13

which species are responsible for caries intitiation?

1. strep mutans
2 s. sobrinus; s. salivarius
3. veillonella - metabolizes lactic acid
4. actinomyces?

14

which species are responsible for caries progression?

1. s. mutans
2. lactobacillus casei, rhamnosus, gasseri, fermentum (all are different lactobacilli)
3. bifidobacterium and scardovia

15

acid tolerant = "__________" which means what?

aciduric
can survive low pH

16

acid producing = "____________" meaning what?

acidogenic
drives pH down

17

which bacterium ferments sugars better at low pH? at high pH?

high pH: s. sanguis is better than s. mutans
low pH: s. mutans is better

18

T/F healthy bacteria stop growing at high pH. They grow and make acid at low pH

F - low pH
F - high pH

19

T/F caries bacteria make acid best at low pH

T

20

what is short term effect of sugar consumption?

drop in pH

21

T/F as you increase your eating frequency, your plaque mass increases.

T

22

how to acquire s. mutans?

get it from mom