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Turbid dentin in carious tooth is all EXCEPT_____________?

  • (A)  Zone of bacterial invasion
  • (B)  Zone which can not be remineralized
  • (C)  Zone in which collagen is irreversibly denatured
  • (D)  Zone that need not be removed before restoration
Submitted By :Ali Uppal


Submitted By :Ali Uppal


Intitation of dental caries depends upon_______________?

  • (A)  Formation of large amount of acid
  • (B)  Availability of carbohydrate food
  • (C)  Viscosity of saliva
  • (D)  Localization of acid over tooth surface
Submitted By :Ali Uppal


Caries, all are true except______________?

  • (A)  Lactobacillus is main acusative organism in plaque
  • (B)  Smooth surface caries occur due to streptococcus mutans
  • (C)  Pit and Fissure caries can be prevented by using pit and tissue sealants
  • (D)  Fluorides help in reducing caries incidence
Submitted By :Ali Uppal


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

  • (A)  Enamel spindles
  • (B)  Dentinoenamel junction
  • (C)  Enamel lamellae
  • (D)  Striae of Retzius
Submitted By :Ali Uppal


In a caries-free individual the saliva has_____________?

  • (A)  low buffering capacity of acids
  • (B)  Medium buffering capacity for acids
  • (C)  High buffering capacity for acids
  • (D)  Independent of buffering capacity for acids
Submitted By :Ali Uppal


Chemico-parasitic theory of dental caries is proposed by______________?

  • (A)  Miller
  • (B)  G.V black
  • (C)  Gottlieb
  • (D)  Schwartz
Submitted By :Ali Uppal


Pioneer bacteria in dental caries are in_____________?

  • (A)  Enamel
  • (B)  Dentin
  • (C)  Pulp
  • (D)  Cementum
Submitted By :Ali Uppal


Cavity formation in a tooth, due to dental caries is due to______________?

  • (A)  Destructive potential of streptococcus mutans
  • (B)  Destructive potential of lactobacillus acidophilus
  • (C)  Lateral spread of caries along DE junction and weakening of the outer covering enamel
  • (D)  Mastectomy force and unrelated to the extent of carious process
Submitted By :Ali Uppal


Which of the following factors in the stephan’s curve is related to the caries incidence and sugar intake______________?

  • (A)  Physical form of sugar
  • (B)  Frequency of sugar intake
  • (C)  Ph of Plaque
  • (D)  Quantity of sugar intake
Submitted By :Ali Uppal