ORAL BIOFILM & MICROBIOLOGY OF PLAQUE

Question 1

What bacteria is dominated by the oral cavity?

Answer 1

Streptococcus

Question 2

What are the different types of oral streptococci?

Answer 2

S.Mutans, S.Oralis, S.salivarius, s.anginosus, s.sanguinis

Question 3

list the 6 bacteria causing caries

Answer 3

s.mutans, lactobacilli, actinomyces, s.auralis, s.salivarious, s.anginoses

Question 4

what are the features of s.mutans

Answer 4

• gram positive
• aerobic
• aciduric/acidogenic

Question 5

list the 4 diff types of bacteria found SUPRA-gingivally

Answer 5

• strep
• actinomyces
• lactobacilli
• vionella

Question 6

list the 7 sub-gingival bacteria

Answer 6

strep, actinomyces, vionella (FACULTATIVE)

(these are STRICT ANAEROBES)
prevotella, fusobacteria, porphyromonas gingivalis, treponema denticola

Question 7

describe the red complex

Answer 7

• porphyromonas gingivalis
• tanarella forsythia
• treponema denticola

Question 8

what do we mean by gram positive and gram negative bacteria

Answer 8

gram negative don’t retain the violet stain - have a thin peptidoglycan cell wall

gram positive retain the dye and appear violet

Question 9

what does the term BIOFILM mean?

Answer 9

the name given to microbial communities attached to a surface