Chapter 17- Dental Soft Deposits, Biofilm, Calculus, and Stain Flashcards
thin, acellular tenacious film formed of proteins, carbohydrates, and lipids
aquired pellicle
functions of pellicle
regulation of mineral homeostasis, host defense and microbial colonization, and lubrication
steps in the formation of oral biofilm
pellicle formation, initial adhesion, maturation, and detachment and dispersment
cell to cell communication process that controls the growth of the microbial community and signals microorganisms when o leave the biofilm and find new sites
quorum sensing
gingivitis is clinically evident in __-__ days
10-21
supragingival biofilm typically consists of gram ____ (posi/neg) _____ (aerobic/anaerobic) bacteria
gram positive aerobic bacteria
subgingival biofilm typically consists of gram ____ (posi/neg) _____ (aerobic/anaerobic) bacteria
gram negative anaerobic bacteria
microorganisms and EPS comprimise __% of biofilm, the other ___% is water
20, 80
inorganic elements found in dental biofilm
calcium, phosphorus, fluoride
organic elements found in dental biofilm
carbohydrates, proteins
the major bacteria associated with dental caries
S. mutans, S. sobrinus, lactobacilli
pH for enamel demineralization is
5.5
pH for root demineralization is
6.7
soft, whitish tooth deposit that is clincially evident without disclosing agent. may have a cottage cheese texture.
material alba
occurs on the external surface of the tooth and may be removed by procedures of toothbrushing, scaling, and polishing
extrinsic
