Tooth Whitening and Cavity Prevention Quiz

What is a common drawback of traditional tooth whitening treatments that use hydrogen peroxide and blue light?

• They are ineffective at removing stains.

• They can damage enamel and cause cavities.

• They are too expensive.

• They require frequent application.

What was the main goal of the researchers in developing a new tooth whitening treatment?

• To make a treatment that works faster than current options.

• To find a safer method that whitens teeth and prevents cavities.

• To develop a treatment that uses red light instead of blue light.

• To create a treatment that is cheaper than existing ones.

Which nanoparticles were used in the new hydrogel treatment to whiten teeth?

• Iron oxide and magnesium oxide nanoparticles

• Titanium dioxide and zinc oxide nanoparticles

• Bismuth oxychloride and copper oxide nanoparticles

• Silver and gold nanoparticles

What was the result of the hydrogel treatment on teeth stained with substances like coffee and tea?

• The teeth became more stained.

• The teeth became sensitive to hot and cold.

• The teeth showed no change.

• The teeth got brighter over time without enamel damage.

How effective was the hydrogel treatment in killing cavity-causing bacteria?

• It killed 50% of the bacteria.

• It killed 75% of the bacteria.

• It killed 94% of the bacteria.

• It had no effect on the bacteria.