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Cariology - RCC 1001 Exam Latest Update
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Cariology - RCC 1001 ExamLatest Update
definition of biofilm - Answer population or community of bacteria living in an organized
structure at the interface between an solid (enamel) and a liquid (saliva)
what is the biofilm we are concerned with in dentistry called - Answer plaque
what is stigmergy? - Answer when small entities indirectly communicate with one
another. like when bacteria in plaque work together collectively
falls in pH result in .... - Answer demineralization
what is the caries threshold of pH - Answer 5.5
what bacteria colonizes a childs mouth that is identical to the mother? - Answer strep
mutans
vertical transmission is to _____ as horizontal transmission is to ______ - Answer parents;
siblings, friends , relatives
pellicle - Answer an acellular, proteinaceous film, derived from saliva (forms on a clean
tooth)
fimbriae - Answer hair like projections that form after the pellicle has been colonized
(most of which are streptococci (non-ms) and gram + aerobes)
extracellular (polymeric) slime layer
what is it? what produced it? - Answer attached bacteria grows = gram + facultative
cocci (streptococci- non-MS) which produces the slime (produces glucans and fuctans)
attaches the bacteria to the tooth and anchors and protects the bacteria
microbial succession - Answer when the population shifts and the bacterial species
become more diverse
example: actinomyces takes over from the streptococcus
what is the order of bacteria colonizing? - Answer gram + aerobes (s. mitis, oralis,
sanguinis, viridens-CALLED NON-MS) --> gram + facultative cocci --> actinomyces --> S
mutans/lactobacillus
there is also a change from gram + aerobes --> gram - anerobes (perio disease)
the bacteria causing caries has 3 main qualities: - Answer 1) acidogenic - convert sugar
, to acid
2) produce polysaccharides
3) aciduric -thrive in low pH
specific plaque hypothesis - Answer only a few organisms out of the diverse collection in
the plaque flora were actively involved in the disease (immunization)
non-specific plaque hypothesis - Answer carious process to be caused by the overall
activity of the total plaque microflora - toothbrushing would spread it then
ecological plaque hypothesis - Answer Demineralization will result from a shift in the
balance of these resident microflora driven by a change in the local environment.
(cleaning, sugar and pH are important)
what type of carb is cariogenic - Answer low molecular weight (sugars)
what is the most harmful sugar - Answer sucrose due to glucosyltransferase in plaque
bacteria
stephan response curve - Answer obtained from sound occlusal surfaces, inactive
occlusal carious lesions and deep, active occlusal carious cavities following sucrose
cavity houses plaque leading to no competition and lower pH are recorded in plaque
within cavities
from dry mouth:
dysgeusia-
dysosmia-
dysesthesia-
dysphagia-
angular chelitis-
sialadenitis- - Answer Dysgeusia - altered taste sensation (e.g., a metallic taste)
dysosmia, altered sense of smell.
dysesthesia-burning or tingling sensation in the mouth
Dysphagia - difficulty swallowing and chewing, especially when eating dry foods. Food
may stick to the tissues during eating.
Angular Chelitis- Dry, sore, and cracked lips and angles of mouth-
Sialadenitis - an infection of the major salivary glands (usually the parotid gland) that
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