Oral Pathology and Medicine MCQs

Page No. 50

The corrct order of microscopic zones of dentinal caries starting from the D.E junction is_______________?


aZone of sclerosis, decalcification zone, bacterial invasion

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bBacterial invasion, decalcification zone, zone of sclerosis

✓


cZone of sclerosis, backterial invasion, decalcification zone

✖


dDecalcification zone, zone of scierosis, backterial invasion

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The dietary carbohydrate most likely involved in etiology of dental caries in man is____________?


aGlucose

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bSucrose

✓


cDextran

✖


dPolysaccharide

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View Answer Sucrose

What is the PH at which initiation of caries begin ?


a4.3-4.5

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b5.2-5.5

✓


c4.9-5.1

✖


d3.5-4.5

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View Answer 5.2-5.5

In the earliest stages of carious lesion. There is loss of______________?


aEnamel cuticle

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bInterprismatic substance

✓


cOrganic matrix

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dEnamel lamellae

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Least cariogenic among these______________?


aRaw starch

✓


bCooked starch

✖


cSucrose

✖


dFructose

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View Answer Raw starch

Turbid dentin in carious tooth is all EXCEPT_____________?


aZone of bacterial invasion

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bZone which can not be remineralized

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cZone in which collagen is irreversibly denatured

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dZone that need not be removed before restoration

✓



Miller put forth the acidogenic theory of dental caries in the year______________?


a1890

✓


b1920

✖


c1924

✖


d1980

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View Answer 1890

Intitation of dental caries depends upon_______________?


aFormation of large amount of acid

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bAvailability of carbohydrate food

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cViscosity of saliva

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dLocalization of acid over tooth surface

✓



Caries, all are true except______________?


aLactobacillus is main acusative organism in plaque

✓


bSmooth surface caries occur due to streptococcus mutans

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cPit and Fissure caries can be prevented by using pit and tissue sealants

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dFluorides help in reducing caries incidence

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The lateral spread of dental caries is facilitated mostly by the_______________?


aEnamel spindles

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bDentinoenamel junction

✓


cEnamel lamellae

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dStriae of Retzius

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