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


bBacterial invasion, decalcification zone, zone of sclerosis


cZone of sclerosis, backterial invasion, decalcification zone


dDecalcification zone, zone of scierosis, backterial invasion



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


aGlucose


bSucrose


cDextran


dPolysaccharide


View Answer Sucrose

What is the PH at which initiation of caries begin ?


a4.3-4.5


b5.2-5.5


c4.9-5.1


d3.5-4.5


View Answer 5.2-5.5

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


aEnamel cuticle


bInterprismatic substance


cOrganic matrix


dEnamel lamellae



Least cariogenic among these______________?


aRaw starch


bCooked starch


cSucrose


dFructose


View Answer Raw starch

Turbid dentin in carious tooth is all EXCEPT_____________?


aZone of bacterial invasion


bZone which can not be remineralized


cZone in which collagen is irreversibly denatured


dZone that need not be removed before restoration



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


a1890


b1920


c1924


d1980


View Answer 1890

Intitation of dental caries depends upon_______________?


aFormation of large amount of acid


bAvailability of carbohydrate food


cViscosity of saliva


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


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


dFluorides help in reducing caries incidence



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


aEnamel spindles


bDentinoenamel junction


cEnamel lamellae


dStriae of Retzius



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