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

  • (A)  Forms a gelatinous matrix
  • (B)  Metabolizes substrate from saliva
  • (C)  Derives energy from enamel constituents
  • (D)  Lives symbiolically with lactobacillus
Submitted By :Ali Uppal


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

  • (A)  Exist regularly in the dental plaque
  • (B)  Produce extracellular amylopectins
  • (C)  Be lethal for gnotobiotic animals
  • (D)  Produce intracellular dextrans
Submitted By :Ali Uppal


Submitted By :Ali Uppal


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

  • (A)  Rapid growth
  • (B)  Frequency of sucrose intake
  • (C)  Negligence in visiting the dentist
  • (D)  Carelessness in oral hygiene habits
Submitted By :Ali Uppal


Early invading bacteria in carious lesions are called___________?

  • (A)  Microcosm
  • (B)  Pioneer bacteria
  • (C)  Advancing bacteria
  • (D)  Anaerobic bacteria
Submitted By :Ali Uppal


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

  • (A)  Streptococci
  • (B)  Lactobacilli
  • (C)  Veillonella
  • (D)  Bateroides
Submitted By :Ali Uppal


The most pronounced effect on the oral microflora of a reduction in rate of salivary flow is a_____________?

  • (A)  Significant increase in number of oral bacteria
  • (B)  Shift towards more acidogenic microflora
  • (C)  Significant decrease in number of oral bacteria
  • (D)  Shift towards more aerobic microflora
Submitted By :Ali Uppal


Keratocanthoma is found most commonly on ?

  • (A)  Lip
  • (B)  Gingiva
  • (C)  Tongue
  • (D)  Hard palate
Submitted By :Ali Uppal


Sturge Weber syndrome is characterized by all EXCEPT_________________?

  • (A)  Exophytic oral Hemangioma
  • (B)  Facial hematoma
  • (C)  Tramline calcification of dura on lateral cephalogram
  • (D)  Facial hemangioma
Submitted By :Ali Uppal


Tumor represented T2 N2 M0 is classified as_______________?

  • (A)  Stage I
  • (B)  Stage II
  • (C)  Stage III
  • (D)  Stage IV
Submitted By :Ali Uppal