Dental Caries Mcqs
Q.1: Lactobacilli are numerous in caious lesions because they______________?G
A. Are the main causative agent
B. Can produce insoluble extracellular polysaccharides3
C. Can attack to smooth enamel surfaces$
D. Are secondary invaders
Q.2: The extra cellular polysaccharide sythesized by cariogenic streptococci in the presence of excess sucrose are best described as_______________?
A. Mucopolysaccharide
B. Dextran-like glucan
C. Glycogen like glucan
D. Amylopectin
Q.3: In a patient with reduced salivary flow the carious incidence is_______________?P
A. More than the patient with normal salivary flow/
B. less than the patient with normal salivary flow/
C. unaffected
D. None of the above
Q.4: The number of dentinal zones in dentinal caries is_____________?@
A. One
B. Two
C. Four
D. Five
Q.5: Widely accepted theory of dental caries_____________?5
A. Proteolytic theory
B. Proteolytic chelation theory
C. Acidogenic theory
D. Autoimmune theory
Q.6: 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
Q.7: Bacteria responsible for initiation of caries is _________________?C
A. Actinomyces
B. Strep. mutans
C. Lactobacillus
D. Strep. viridans
Q.8: Oral foci of millers are seen in_______________?3
A. Dental caries
B. Lichen planus
C. Herpes simplex
D. Syphilis
Q.9: 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
Q.10: Which tooth in the permanent dentition is the most susceptible to dental caries ?Q
A. Maxillary 1st premolar
B. Maxillary 2nd molar
C. Mandibular 1st molar
D. Mandibular 2nd molar

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