Oral Pathology and Medicine MCQs

Page No. 48

Widely accepted theory of dental caries_____________?


aProteolytic theory

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bProteolytic chelation theory

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cAcidogenic theory

✓


dAutoimmune theory

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View Answer Acidogenic theory

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


aS. Sarcinus

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bS. macae

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cS. sanguis

✓


dS. salivarius

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View Answer S. sanguis

Bacteria responsible for initiation of caries is _________________?


aActinomyces

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bStrep. mutans

✓


cLactobacillus

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dStrep. viridans

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View Answer Strep. mutans

Oral foci of miller’s are seen in_______________?


aDental caries

✓


bLichen planus

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cHerpes simplex

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dSyphilis

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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

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bApex to base

✓


cApex to apex

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dNone of the above

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View Answer Apex to base

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


aMaxillary 1st premolar

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bMaxillary 2nd molar

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cMandibular 1st molar

✓


dMandibular 2nd molar

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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

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cDerives energy from enamel constituents

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dLives symbiolically with lactobacillus

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


aExist regularly in the dental plaque

✓


bProduce extracellular amylopectins

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cBe lethal for gnotobiotic animals

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dProduce intracellular dextrans

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


aGlucose

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bFructose

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cSucrose

✓


dLactose

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View Answer Sucrose

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


aRapid growth

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bFrequency of sucrose intake

✓


cNegligence in visiting the dentist

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dCarelessness in oral hygiene habits

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