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15 Cards in this Set
- Front
- Back
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What does the mouth contain? |
normal oral microbiota that have colonized and continually are maintained on teeth and soft tissues and in saliva |
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What appears and can only survive on the teeth ? |
Streptococcus mutans |
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What does normal oral microbiota consist of? |
mostly of bacteria; 1/3 Candida albicans complex with at least 42 known genera of bacteria` |
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What are dental caries and how are they caused? |
infectious disease and is caused by demineralization of tooth structure by acids produced during metabolism of dietary sugars |
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What is dental plaque? |
a microbial mass that accumulates on teeth in absence of good oral hygiene |
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what is composed of bacterial cells embedded in an intercellular matrix? |
biofilm |
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What happens as plaque accumulates and there is an absence of good oral hygiene? |
damage to teeth(caries) or to nearby periodontal tissues (gingivitis or periodontitis) |
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In some people, plaque can mineralize and harden, what is this called? |
calculus |
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What consists of the most caries-conducive bacteria in the mouth? |
mutans streptococci(group of closely related streptococci) |
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what pathogenic properties do mutans streptococci have? |
1. production of acids from carbs 2. survival at low pH 3. accumulation on teeth |
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What are mutans streptococci important for? |
plaque formation and accumulated rapidly in presence of sucrose |
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What species are important for progression of carious lesion after other bacteria have initiated the tooth deconstruction? |
Lactobacillus acidophilus and Lactobacillus casei |
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What causes 1. juvenile periodontitis, 2. periodontal disease, 3. chancre sores? |
1. Aggregatibacter actinomycetemcomitans 2. Porphyromonas gingivalis 3. Treponema denticola |
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What are efficient against preventing caries? |
flossing, brushing teeth, fluoride and pit&fissure sealants |
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What happens of members of normal oral microbiota are allowed to gain entrance to deeper tissues? |
become pathogenic |
