Bacterial Colonization of the Tooth Surface Flashcards Preview

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Flashcards in Bacterial Colonization of the Tooth Surface Deck (22):
1

does a mature biofilm consist of only one species of bacteria?

no

2

how does the biofilm develop?

bacterial species are stacked one on top of the other

3

______ is cell-to-cell adherence of one oral bacterium to another

coaggregation

4

is coaggregation random? if not, explain

no it is not random: each bacterial strain only has a limited set of bacteria to which they are able to adhere

5

the first bacteria to colonize to the tooth surface are ____

non-pathogenic

6

can other bacteria colonize to the tooth surface if the non-pathogenic bacteria are not present?

no, the early colonizers lay the foundation for the growth of the biofilm

7

until the early colonizers attach to the tooth what are the pathogens doing?

freely floating

8

when can free floating bacteria join the biofilm?

when signals are sent from the early colonizers saying that conditions are favorable

9

early colonizers cannot attach to the pellicle, but have the ability to ____ with the streptococcal species

coaggregate

10

are most of the periodontal pathogens early, intermediate, or late colonizers?

late

11

can late colonies attach to the early colonizers?

no, the late colonizing bacteria can only attach to the intermediate bacteria

12

can free floating periodontal pathogens cause disease?

no

13

how can the biofilm be disrupted? and then what happens?

by brushing and flossing it can be disrupted but then the biofilm process starts all over again with the early colonizers

14

the organization of bacteria within a biofilm is ____

not random

15

what color are early colonizers that are believed to be compatible with gingival health?

yellow and green complexes

16

what colors are thought to be major etiologic agents of perio disease

orange and red complexes

17

what part of the tooth do the early colonizers adhere to?

the pellicle

18

where does plaque biofilm development start and progress to?

starts supragingivally and progresses subgingivally

19

how long does it take supragingival biofilm to form if not disrupted?

7 days

20

how long does it take subgingival biofil to form if not disrupted?

3 to 12 weeks

21

what is the most dentrimental to the periodontal tissues

tissue-associated plaque

22

can bacteria invade the gingival connective tissue?

yes