control of biofilm nutrient sources
altering of ph within biofilm colonies
Addition of systemic antibiotics.
varying the oxygen concentration within the biofilm
a calcified collection of bacteria that cannot be easily removed
a well-organized, cooperating community of microorganisms
an acellular translucent, homogeneous film covering moist surfaces
a loose collection of free-floating bacteria
detoxification of human waste products
Humans have a symbiotic relationship with their microbiome
layer in dental unit water lines
coating in fish tanks
lining on indwelling catheters
"Calculus plays a major role in causing periodontitis."
"The presence of bacterial plaque is necessary to develop periodontal disease, but not sufficient to guarantee disease."
"All bacteria in plaque contribute to gingivitis and periodontitis."
"Where there is more plaque, there is more disease."
A. actinomycentemcomitans
B. forsythus
T. pallidum
P. gingivalis
periodontal pockets contain both pathogens and non-pathogens
periodontal disease goes through active and quiescent periods
None of the above.
the different bacteria in periodontal pockets require different culture media
confocal scanning laser microscopy
scanning electron microscopy
smear microscopy
wet mount microscopy
Bacteria are dispersed more or less evenly through the plaque.
The environment surrounding bacteria consists of the same or similar pHs.
Bacteria communicate with each other by sending out chemical signals.
Bacteria exist in isolation from each other.
none of the above.
Prevent fluid flow between microcolonies of bacteria in a biofilm.
Change the oxygen concentration with the biofilm microenvironments.
Keep bacteria from communicating with each other.
The biofilm matrix serves as a protective barrier.
The biofilm fluid channels direct the antimicrobial agent out of the pocket.
The biofilm changes the pH of the antimicrobial agent and inactivates the agent.
The biofilm prevents the antimicrobial agent from entering the periodontal pocket.
Varying the oxygen concentration within biofilm.
Alteration of pH within biofilm microcolonies.
Control of biofilm nutrient sources.
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