A. 1890
B. 1920
C. 1924
D. 1980
Related Mcqs:
- Progression of dental caries caries on pit and fissure occurs from:
A. Apex of the pit and fissure
B. Wide and of the pit and fissure
C. Lateral surface of the pit and fissure
D. Bottom of the pit and fissure - Chemico-parasitic theory of dental caries is proposed by______________?
A. Miller
B. G.V black
C. Gottlieb
D. Schwartz - Smooth surface caries is characterized by spread of caries in enamel and dentin as cones. These alignment in enamel and dentin is____________?
A. Base to base
B. Apex to base
C. Apex to apex
D. None of the above - S. mutans is involved in dental caries initiation Other bacteria also involved is______________?
A. S. Sarcinus
B. S. macae
C. S. sanguis
D. S. salivarius - 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 - 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 - The dietary carbohydrate most likely involved in etiology of dental caries in man is____________?
A. Glucose
B. Sucrose
C. Dextran
D. Polysaccharide - Dental caries is associated with_____________?
A. Streptococcus agalactiae
B. Streptococcus mutans
C. Streptococcus bovis
D. Streptococcus anginosus - 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 - Pioneer bacteria in dental caries are in_____________?
A. Enamel
B. Dentin
C. Pulp
D. Cementum
