Oral Microbiology 1 and 2- Robison Flashcards
What kind of bacteria is on the dorsum of the tongue?
Gram positive bacteria
Low levels of Cariogenic bacteria
Low levels of periodontial pathogens
What are the features of the gingival epithelium?
Major type: kertinocytes
Minor types: Langerhans, Melanocytes, Merkel Cells
What is the predominant supragingival organisms?
S. mutans
S. salivarius
S. anguinsus
S. mitis
Anaerobes and faculative anaerobes
Only 50-60% are cultivable
What is the predominant subgingival organisms?
Actinomyces, Prevotella, Fusobacterium, Veillonella, and Porphymonas
How does saliva modulate bacterial growth?
Provides a protein pellicle to make a binding surface
Acts as a nutrient source
Co-aggregate bacteria
Provides specific and non-specific immune factors
Maintains pH
What are the five stages of biofilm development?
Initial attatchment Irreversible attatchment Maturation I Maturation II Dispersion
What is important about timing and microbial complexes in biofilm?
The earlier complexes are less virulent, while the late complexes are worse
What is the corncob?
Complexes of Rods and Cocci
What are the major factors in dental caries?
Time, Substrate, Plaque microorganisms, Host and teeth
What are essential properties of cariogenic bacteria?
acidogenic produce pH to demineralize survive at low pH possess attachment mechanisms produce insoluble polysaccharide
Does IgA have any affect on caries activity?
No
What does gingivitis appear to be?
Red inflammed gums
What does NUG appear to look like?
White gums with spontaneous hemmorraging and punched out papillae
What are the types of periodontial pockets?
Gingival- no destruction of supporting periodontial structures
Suprabony- Destruction of horizontial bone
Intrabony- Destruction of vertical bone
Which is better for IDing periodontial pathogens: Kochs or Socransky?
Socransky
Kochs need to be grown in pure culture.
