Oral Pathology and Medicine MCQs

Page No. 49

Early invading bacteria in carious lesions are called___________?


aMicrocosm

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bPioneer bacteria

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cAdvancing bacteria

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dAnaerobic bacteria

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View Answer Pioneer bacteria

Which of the following organisms is found in deep carious lesions rather than in incipient lesions ?


aStreptococci

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bLactobacilli

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cVeillonella

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dBateroides

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View Answer Lactobacilli

The most pronounced effect on the oral microflora of a reduction in rate of salivary flow is a_____________?


aSignificant increase in number of oral bacteria

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bShift towards more acidogenic microflora

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cSignificant decrease in number of oral bacteria

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dShift towards more aerobic microflora

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Cavity formation in a tooth, due to dental caries is due to______________?


aDestructive potential of streptococcus mutans

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bDestructive potential of lactobacillus acidophilus

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cLateral spread of caries along DE junction and weakening of the outer covering enamel

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dMastectomy force and unrelated to the extent of carious process

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Which of the following factors in the stephan’s curve is related to the caries incidence and sugar intake______________?


aPhysical form of sugar

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bFrequency of sugar intake

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cPh of Plaque

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dQuantity of sugar intake

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View Answer Ph of Plaque

The attachment of the Actinomyces species to the tooth surface is facilitated by____________?


aFimbriae

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bCilia

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cFlagella

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dPseudopodia

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View Answer Fimbriae

Organism involved in smooth surface caries is____________? 0 1 Streptococcus mutans 2 Actinomyces viscosus 3 Lactobacillus 4 Campylobacter


aonly 1

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bonly 2

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c1 and 3

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dAll of the above

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View Answer only 1

Starch is considered to be less cariogenic than monosaccharides and disaccharides because it_______________?


aDoes not diffuse through plaque

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bIs rapidly hydrolysed in the mouth

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cEnhances remineralisation

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dRaises the PH in the oral cavity

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Which of the following is cariogenic ?


aSelenium

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bVanadium

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cStrontium

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dMolybdenum

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View Answer Selenium

Dental caries is associated with_____________?


aStreptococcus agalactiae

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bStreptococcus mutans

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cStreptococcus bovis

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dStreptococcus anginosus

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View Answer Streptococcus mutans

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