The attachment of the Actinomyces species to the tooth surface is facilitated by____________?
A. Fimbriae
B. Cilia
C. Flagella
D. Pseudopodia
Dental Caries
Which of the following factors in the stephan’s curve is related to the caries incidence and sugar intake______________?
Which of the following factors in the stephan’s curve is related to the caries incidence and sugar intake______________?
A. Physical form of sugar
B. Frequency of sugar intake
C. Ph of Plaque
D. Quantity of sugar intake
Cavity formation in a tooth, due to dental caries is due to______________?
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 most pronounced effect on the oral microflora of a reduction in rate of salivary flow is a_____________?
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
Which of the following organisms is found in deep carious lesions rather than in incipient lesions ?
Which of the following organisms is found in deep carious lesions rather than in incipient lesions ?
A. Streptococci
B. Lactobacilli
C. Veillonella
D. Bateroides
Early invading bacteria in carious lesions are called___________?
Early invading bacteria in carious lesions are called___________?
A. Microcosm
B. Pioneer bacteria
C. Advancing bacteria
D. Anaerobic bacteria
The prbable reasons for a high incidence of dental caries in the teenage population relates most directly to______________?
The prbable reasons for a high incidence of dental caries in the teenage population relates most directly to______________?
A. Rapid growth
B. Frequency of sucrose intake
C. Negligence in visiting the dentist
D. Carelessness in oral hygiene habits
The enzyme glucosyl transferase secreted by Streptococcus mutans sythesizes glucans from_____________?
The enzyme glucosyl transferase secreted by Streptococcus mutans sythesizes glucans from_____________?
A. Glucose
B. Fructose
C. Sucrose
D. Lactose
For a bacterium to be seriously considered in the etiology of dental caries, it must______________?
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
Streptococcus mutans is considered to be principle etiologic agent of caries because it produces organic acids and it ________________?
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