Oral Pathology and Medicine MCQs

Page No. 48

Widely accepted theory of dental caries_____________?


aProteolytic theory


bProteolytic chelation theory


cAcidogenic theory


dAutoimmune theory


View Answer Acidogenic theory

S. mutans is involved in dental caries initiation Other bacteria also involved is______________?


aS. Sarcinus


bS. macae


cS. sanguis


dS. salivarius


View Answer S. sanguis

Bacteria responsible for initiation of caries is _________________?


aActinomyces


bStrep. mutans


cLactobacillus


dStrep. viridans


View Answer Strep. mutans

Oral foci of miller’s are seen in_______________?


aDental caries


bLichen planus


cHerpes simplex


dSyphilis


View Answer Dental caries

Smooth surface caries is characterized by spread of caries in enamel and dentin as cones. These alignment in enamel and dentin is____________?


aBase to base


bApex to base


cApex to apex


dNone of the above


View Answer Apex to base

Which tooth in the permanent dentition is the most susceptible to dental caries ?


aMaxillary 1st premolar


bMaxillary 2nd molar


cMandibular 1st molar


dMandibular 2nd molar


View Answer Mandibular 1st molar

Streptococcus mutans is considered to be principle etiologic agent of caries because it produces organic acids and it ________________?


aForms a gelatinous matrix


bMetabolizes substrate from saliva


cDerives energy from enamel constituents


dLives symbiolically with lactobacillus



For a bacterium to be seriously considered in the etiology of dental caries, it must______________?


aExist regularly in the dental plaque


bProduce extracellular amylopectins


cBe lethal for gnotobiotic animals


dProduce intracellular dextrans



The enzyme glucosyl transferase secreted by Streptococcus mutans sythesizes glucans from_____________?


aGlucose


bFructose


cSucrose


dLactose


View Answer Sucrose

The prbable reasons for a high incidence of dental caries in the teenage population relates most directly to______________?


aRapid growth


bFrequency of sucrose intake


cNegligence in visiting the dentist


dCarelessness in oral hygiene habits



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