Oral Pathology and Medicine MCQs

Page No. 49

Early invading bacteria in carious lesions are called___________?


aMicrocosm


bPioneer bacteria


cAdvancing bacteria


dAnaerobic bacteria


View Answer Pioneer bacteria

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


aStreptococci


bLactobacilli


cVeillonella


dBateroides


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


bShift towards more acidogenic microflora


cSignificant decrease in number of oral bacteria


dShift towards more aerobic microflora



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


aDestructive potential of streptococcus mutans


bDestructive potential of lactobacillus acidophilus


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


dMastectomy force and unrelated to the extent of carious process



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


aPhysical form of sugar


bFrequency of sugar intake


cPh of Plaque


dQuantity of sugar intake


View Answer Ph of Plaque

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


aFimbriae


bCilia


cFlagella


dPseudopodia


View Answer Fimbriae

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


aonly 1


bonly 2


c1 and 3


dAll of the above


View Answer only 1

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


aDoes not diffuse through plaque


bIs rapidly hydrolysed in the mouth


cEnhances remineralisation


dRaises the PH in the oral cavity



Which of the following is cariogenic ?


aSelenium


bVanadium


cStrontium


dMolybdenum


View Answer Selenium

Dental caries is associated with_____________?


aStreptococcus agalactiae


bStreptococcus mutans


cStreptococcus bovis


dStreptococcus anginosus


View Answer Streptococcus mutans

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