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Cariology > Oral Microflora > Flashcards

Flashcards in Oral Microflora Deck (16)
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1

What are 3 disease causing factors for caries? (BAD)

1-Bad bacteria
2-Absence of saliva
3-Dietary habits (poor)

2

What are 4 protective factors for caries? (SAFE)

1-Saliva and Sealants
2-Antimicrobials
3-Fluoride
4-Effective diet

3

Acquisition of oral strep and gram-negative species in children is predominantly from what source?

Their mothers

4

What changes when teeth erupt?

There is now a non-shedding surface to which microflora can adhere

5

What two bacteria generally only appear in the normal mouth following tooth eruption?

1-Streptococci Mutans
2-S. Sanguinis

6

Dental plaque is a ______ but not all ________ are dental plaque

Biofilm, biofilms

7

What are the 5 steps to dental biofilm development?

1-Pellicle formation (minutes to hours)
2-Attachment of a single bacterial cell (0-24 hr)
3-Growth of attached bacteria and formation of distinct micro colonies (4-24 hr)
4-Microbial succession w/increased diversity
5-Climax community/mature biofilm (~1 week)

8

Salivary glycoproteins, phosphoproteins, lipids and some components of the gingival crevicular fluid make up what?

Pellicle

9

What are 4 functions of the pellicle?

1-Protect tooth from acids
2-Matrix for enamel repair
3-Reduce friction
4-Receptor for lysosomes, immunoglobulins and other proteins

10

What 3 species comprise 95% of the streptococci and 56% of total initial microflora?

1-S. Sanguinis
2-S. Oralis
3-S. mitis

*Mutans streptococcie comprise 2% or strep

11

What process is exemplified by the shift from streptococcus dominant plaque to actinomyces dominated plaque?

microbial succession

*actinomyces implicated in root surface caries due to anaerobic

12

Which hypothesis states that all plaque is bad and that the difference between caries and no caries is only the amount of plaque?

Non-specific plaque hypothesis

13

Which hypothesis recognizes that plaque is a problem but the specific concentration of cariogenic bacteria is what is important?

Specific plaque hypothesis

14

Which hypothesis states the disease-causing bacteria may be present in unaffected sites and that changes in local environment cause a shift in balance and result in demineralization?

Ecological plaque hypothesis

15

How much saliva do we produce daily?

0.5-1.0 liters (99% water, less than 1% solids)

16

What are 4 functions of saliva?

1-Inhibition of some bacteria
2-dilution and elimination of bacteria and their substrates
3-buffering bacterial acids
4-Reparative environment