Medical MCQs

5099 MCQs  (Page 304 of 510)

The most pronounced effect on the oral microflora of a reduction in rate of salivary flow is a_____________?
A. Significant increase in number of oral bacteria
B. Shift towards more acidogenic microflora
C. Significant decrease in number of oral bacteria
D. Shift towards more aerobic microflora
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
Oral foci of miller’s are seen in_______________?
A. Dental caries
B. Lichen planus
C. Herpes simplex
D. Syphilis
Which tooth in the permanent dentition is the most susceptible to dental caries ?
A. Maxillary 1st premolar
B. Maxillary 2nd molar
C. Mandibular 1st molar
D. Mandibular 2nd molar
Bacteria responsible for initiation of caries is _________________?
A. Actinomyces
B. Strep. mutans
C. Lactobacillus
D. Strep. viridans
In a patient with reduced salivary flow the carious incidence is_______________?
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