In the earliest stages of carious lesion. There is loss of______________?
(A) Enamel cuticle
(B) Interprismatic substance
(C) Organic matrix
(D) Enamel lamellae
Least cariogenic among these______________?
(A) Raw starch
(B) Cooked starch
(C) Sucrose
(D) Fructose
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
Miller put forth the acidogenic theory of dental caries in the year______________?
(A) 1890
(B) 1920
(C) 1924
(D) 1980
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
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
The lateral spread of dental caries is facilitated mostly by the_______________?
(A) Enamel spindles
(B) Dentinoenamel junction
(C) Enamel lamellae
(D) Striae of Retzius
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
Chemico-parasitic theory of dental caries is proposed by______________?
(A) Miller
(B) G.V black
(C) Gottlieb
(D) Schwartz