WorksheetsQuiz : Dental Plaques
Total questions: 10
Worksheet time: 6mins
Which bacterial species is most commonly associated with the formation of dental plaque?
Escherichia coli
Staphylococcus aureus
Streptococcus mutans
Lactobacillus casei
Dental plaque is made up only of bacteria and saliva.
True
False
What metabolic process do plaque bacteria use to generate acids from sugar?
Glycolysis
Fermentation
β-oxidation
Glycogenesis
Which of the following is a direct result of acid production in dental plaque?
Increased salivary flow
Tooth enamel demineralization
Tooth enamel remineralization
Alkalinization of the mouth
Which sugar is most cariogenic due to its role in plaque formation?
Glucose
Sucrose
Fructose
Lactose
Plaque bacteria can metabolize sugar into acids without oxygen
True
False
The pH in dental plaque rises significantly after sugar intake
True
False
Dental plaque is a biofilm composed of bacteria, polysaccharides, proteins, and saliva components. It forms when bacteria metabolize sugars to produce extracellular polysaccharides that help them adhere to tooth surfaces
True
False
How does fluoride act to prevent dental caries at the biochemical level?
It stimulates plaque bacterial growth
It dissolves plaque matrix
It degrades bacterial DNA
It inhibits bacterial enolase and enhances enamel remineralization
Bacteria use the enzyme glucosyltransferase to convert sucrose into glucans, a sticky, adhesive matrix that helps bacteria attach to the tooth surface creating dental plaque (biofilm).
