Dental plaque and Biofilms (5) Flashcards
What type of bacteria colonise the pits and fissures of teeth?
gram -positive
faculative anaerobes
Streptococcus
esp extracellular polysaccharide producing species
actinomyces
where are bacteria colonising here?
pits and fissures
Why would bacteria colonise pits and fissures?
Impacted food
What type of bacteria colonise proximal surfaces?
Predominant groups of bacteria found:
Gram positive and Gram negative;
facultative and obligate anaerobes
Neisseria
Streptococcus
Large numbers
Actinomyces
Predominates
Prevotella
Veillonella
Is plaque in the pits and fissures a simple community?
YES
Why is there a large number of obligate anaerobes on proximal surfaces?
lower redox potential
On each site on the proximal tooth surface, what does each site represent?
a distinct ecosystem
What type of bacteria would be present in this plaque?
Gram positive and Gram negative; facultative and obligate anaerobes
Neisseria
Streptococcus
Large numbers
Actinomyces
Predominates
Prevotella
Veillonella
What bacteria would be present in the gingival crevice?
High species diversity
Predominant groups of bacteria found:
Gram positive and Gram negative;
facultative and obligate anaerobes:
Streptococcus
Actinomyces
Eubacterium
Fusobacterium
Prevotella
Treponema
What type of bacteria would be found here?
High species diversity
Predominant groups of bacteria found:
Gram positive and Gram negative;
facultative and obligate anaerobes:
Streptococcus
Actinomyces
Eubacterium
Fusobacterium
Prevotella
Treponema
What influences the ecological diversity in the gingival crevice?
GCF
Gingival crevicucal fluid
and Variation seen between health and diseased sites
Are bacteria in the gingival crevice asacchrolytic or sacchrolytic?
asacchrolytic but proteolytic; they derive their energy from the breakdown of amino acids, proteins and peptides
What type of bacteria is seen in denture plaque?
The microflora is highly variable
Difference in the fitting surface and exposed surfaces
Candida Species
Denture hygiene
