Dental Caries Flashcards
how many species of bacteria have been identified in the oral biofilm
700
what are the regions of biofilm that are not neutralized by saliva buffers
exopolysaccharide rich matrix (EPS)
what are the bacterial types that dominate plaque
filamentous and spiral
how long after a cleaning can biofilm reaccumulate
2 hours
if left undisturbed, biofilm creates what type of environment
anaerobic - for the attachment of streptococci
how much saliva does an adult produce in one day
1-1.5L
signs of hyposalivation
lack of pooling on the floor of the mouth
gingivitis
mucositis
what is an important composition of saliva that that stabilizes calcium and phosphate
statherin
high-frequency exposure to fermentable carbohydrates such as ______ may be the most important factor in producing cariogenic biofilm and, ultimately, caries lesions
sucrose
dietary intake for caries should focus on
acidity and sucrose
what is the most susceptible site for caries
- pit a fissure
- smooth enamel
- root surfaces
what is the first clinical evidence of of dimeneralization
white spots - non cavitated lesions that appear chalky white
(caused by poor oral hygiene, frequent exposure to sucrose or acid)
describe sclerotic dentin
shiny, darker in color, feels hard to the explorer’s tip
what is the most superficial zone of the carious dent
necrotic zone
unattached dentin in the pulp chamber is called
pulp stones
infection in the pulp is characterized by
inflammatory response
capillary dilation
local edema
stagnation of blood flow
recently erupted teeth with large pulp chambers and short-wide canals have _____ type of chance for surviving than a fully formed tooth with small pulp chambers
greater
caries progression happens how
- demineralization of organic matrix
- organic matrix of dentin is denatured/degraded
- loss of matrix
CAMBRA
caries management by risk assessment
what percentage of sodium fluoride is most effective
5%
what is the main drawback of SDF
the precipitate of silver that makes the carious dentin stain black
how long should SDF be applied
3 minutes with a microbrush, rised with water, and covering with fluoride varnish
when are caries reported to be reactivated after SDF
24 months
what type of sealant is best used for filling of pits/fissures
low viscous
