1 Streptococcus mutans
2 Actinomyces viscosus
3 Lactobacillus
4 Campylobacter
A. only 1
B. only 2
C. 1 and 3
D. All of the above
Related Mcqs:
- 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 - The dietary carbohydrate most likely involved in etiology of dental caries in man is____________?
A. Glucose
B. Sucrose
C. Dextran
D. Polysaccharide - 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 - An asymptomatic tooth has deep has deep caries on occlusal surface. Radiograph shows radiopaque mass at apex of the tooth: this mass is most likely to be:____________?
A. Cementoma
B. Condensing Osteitis
C. Chronic apical periodontitis
D. Acute apical periodontitis - The caries of enamel surface leads to accentuation of:__________?
A. Incremental lines of retzius
B. Perikymata
C. Imbrication lines of pickerill
D. Wickham’s striae - Organism involved in cellulitis is:___________?
A. Strept. mutans
B. Strept. pyogenes
C. Pneumococci
D. klebsiella - The most common organism involved in a periapical abscess is:__________?
A. Strep. Pyogens
B. Strep. viridans
C. β hemolytic stretococci
D. Non hemolytic stretococci - 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 - Miller put forth the acidogenic theory of dental caries in the year______________?
A. 1890
B. 1920
C. 1924
D. 1980
