4. Biofilm and Periodontal Microbiology Flashcards
6
What is the primary habitat for periopathogens?
6
What are two bacteria that decrease in quantity after a full-mouth tooth extraction?
10
What is a biofilm?
10
Can biofilm be removed by risning or spraying?
11
What is the term for the soft accumulation of food, bacteria, and tissue cells?
13
Describe the oxidation-reduction potential of the subgingival microbiota.
11
Can material alba be removed by water spray?
13
Is the sublingual microbiota an aerobic or anaerobic environement?
13
What creates the anaerobic environment of subgingival microbiota?
15
The biofilm is an _______ of mature plaque?
15
In biofilm, microcolonies are distributed in a shaped matrix known as a ______.
15
What runs through the plaque mass in the biofilm?
15
What does the biofilm act as to bring nutrients to bacteria?
What is the name for the free-floating bacteria that are not in an organized biofilm?
17
Are planktonic bacteria more or less susceptible to antibiotics?
18
The biofilm retains substances produced by bacteria and ____ them.
18
The biofilm fosters ________ among different bacterial species.
18
Is the biofilm more or less resistant to antibiotics?
19
What must happen to the biofilm in order for antibiotics to be effective?
19
What is a way to disturb the biofilm?
20
What are the 3 general steps for the formation of the dental biofilm?
20
What does the pellicle have receptor sites for?
21
The pellicle is a _____ derived layer
21
What three molecules does the pellicle have?
21
How long after a prophy is the pellicle deposited?
22
What are the 5 primary colonizer species of bacteria?
24
What does surface micro-roughness facilitate?
24
What are two examples of surface micro-roughness?
25
The nonspecific plaque hypothesis says that periodontal disease results from accumulation of ____ over time, eventual diminished _______, and increased susceptibility with ______.
26
What does the specific plaque hypothesis say?
27
What is the name for the plaque hypothesis that says that BOTH the total amount of dental biofilm and the specific microbial composition are importannt in disease?
31
Periodontitis is the result of _____ in microbiota?
32
How do you return to microbial homeostasis?
33
What is the Community as a Pathogen Hypothesis for periodontitis?
34
Is P. gingivalis a potent stand-alone inducer of inflammation?
34
How does the presence of P. gingivalis in the microbial biofilm elevate the pathogenicity?
37
What are four bacteria seen in health pus?
38
What is the organism associated with pregnancy-associated gingivitis?
40
What is the main bacteria involved in molar/incisor pattern periodontitis?
42
There is a shift from ______ organisms in healthy gums to _____ organisms in periodontitis?
44
What is the term for the inflammatory process around a dental implant resulting in loss of bone?
46
Is A. actinomycetemcomitans gram positive or gram negative?
46
Is A. actinomycetemcomitans motile or nonmotile?
46
What are 4 virulence factors for A. actinomycetemcomitans?
46
Lipopolysaccharide is an endotoxin involved in _______.
46
What antibody does protease cleave?
47
Is Tannerella forsythia gram positive or gram negative?
47
Is Tannerella forsythia an anaerobe or aerobe?
47
Is Tannerella forsythia motile or non-motile?
47
What are two virulence factors for Tannerella forsythia?
48
Is P. gingivalis gram positive or gram negative?
48
Is P. gingivalis an obligate anaerobe or aerobe?
48
Is P. gingivalis motile or non-motile?
48
What are 5 virulence factors of P. gingivalis?
49
Is Prevotella intermedia gram negative or positive?
49
Is Prevotella intermedia a strict an aerobe or anaerobe?
49
Is prevotella intermedia motile or non-motile?
49
Is prevotella intermedia more or less virulent than P. gingivalis?
49
How does prevotella intermedia appear on blood agar?
50
Is campylobacter rectus gram negative or gram positive?
50
Is campylobacyter rectus an anaerobe or aerobe?
50
Is campylobacter rectus motile or nonmotile?
50
What is a virulence factor of campylobacter rectus?
51
Is fusobacterium nucleatum gram positive or negative?
51
Is fusobacterium nucleatum an aerobe or an anaerobe?
51
What is the virulence factor for fusobacterium nucleatum?
52
Is parvimonas micra gram positive or gram negative?
52
Is parvimonas micra an anaerobe or aerobe?
53
Is eubacterium nodatum gram positive or negative?
53
Is eubacterium nodatum an obligate anaerobe or aerobe?
54
Are spirochettes gram positive or negative?
54
Are spirochetes motile or nonmotile?
54
What are three virulence factors of spirochetes?
55
What type of bacteria is Eikenella corrodens?
55
Is Eikenella corrodens gram negative or gram positive?
55
Is Eikenella corrodens aerobic or anaerobic?
56
What are three viruses associated with periodontal pockets?
57
What is the name for a substrate utilized by host microorganisms conferring a health benefit?
57
How does Arginine affect the pH?
57
What does Arginine stimulate that is harmful to perio pathogens?
