🏥Medical MCQs
Medical MCQs
499 MCQs11
Lactobacilli are numerous in caious lesions because they______________?
AAre the main causative agent
BCan produce insoluble extracellular polysaccharides
CCan attack to smooth enamel surfaces
DAre secondary invaders
12
Tumor represented T2 N2 M0 is classified as_______________?
AStage I
BStage II
CStage III
DStage IV
13
Which of the following factors in the stephan’s curve is related to the caries incidence and sugar intake______________?
APhysical form of sugar
BFrequency of sugar intake
CPh of Plaque
DQuantity of sugar intake
14
Cavity formation in a tooth, due to dental caries is due to______________?
ADestructive potential of streptococcus mutans
BDestructive potential of lactobacillus acidophilus
CLateral spread of caries along DE junction and weakening of the outer covering enamel
DMastectomy force and unrelated to the extent of carious process
15
The most pronounced effect on the oral microflora of a reduction in rate of salivary flow is a_____________?
ASignificant increase in number of oral bacteria
BShift towards more acidogenic microflora
CSignificant decrease in number of oral bacteria
DShift towards more aerobic microflora
16
Which of the following organisms is found in deep carious lesions rather than in incipient lesions ?
AStreptococci
BLactobacilli
CVeillonella
DBateroides
17
Early invading bacteria in carious lesions are called___________?
AMicrocosm
BPioneer bacteria
CAdvancing bacteria
DAnaerobic bacteria
18
The prbable reasons for a high incidence of dental caries in the teenage population relates most directly to______________?
ARapid growth
BFrequency of sucrose intake
CNegligence in visiting the dentist
DCarelessness in oral hygiene habits
19
The enzyme glucosyl transferase secreted by Streptococcus mutans sythesizes glucans from_____________?
AGlucose
BFructose
CSucrose
DLactose
20
For a bacterium to be seriously considered in the etiology of dental caries, it must______________?
AExist regularly in the dental plaque
BProduce extracellular amylopectins
CBe lethal for gnotobiotic animals
DProduce intracellular dextrans