plaque 2 colonisation

Question 1

immature plaque is formed how long after brushing?

Answer 1

3-8 hours after brushing

Question 2

is immature plaque gram+ve or gram-ve cocci

Answer 2

Gram +ve cocci,

Question 3

what bacteria is found in immature plaque.

Answer 3

Strep. Sanquis
Strep. mutans

Question 4

most common bacteria in plaque

Answer 4

Strep. Mitior (mitis)

Question 5

2 Gram positive rods

Answer 5

Actinomyces Naeslundii
Actinomyces Viscosus

Question 6

by 24 hours of no toothbrushing
what happens?

Answer 6

immature plaque is formed
Gram -ve cocci and rods now detectable

Question 7

by 3-5 days of no toothbrushing what happens?

Answer 7

Proportion of Gram -ve and +ve becoming equal.
Anaerobic organisms increase
Fusiform bacilli and filamentous organisms can be detected

Question 8

by the end of 5 days of no tooth brushing what happens?

Answer 8

Gram -ve cocci and bacilli present
Larger numbers of filamentous organisms present.
Arranged in palisading manner.

Cocci and bacilli cluster round filaments, corn -cobbing.

Question 9

by 7-10 days of no toothbrushing what happens?

Answer 9

mature plaque is present
Final phase of plaque maturation .
Further decrease in Gram +ve organisms.
Fusiform bacilli, spirochaetes and vibrios also apparent.

Predominantly Gram -ve organisms.

Question 10

what environment does sub gingival plaque survive in?

Answer 10

anaerobic

Question 11

where does sub gingival plaque get its nutrients from?

Answer 11

Nutrients derived from crevicular fluid.

Question 12

oxygen requirements for early plaque? And mature ?

Answer 12

Early plaque - more aerobic
Mature plaque - anaerobic