WONDER #1248: What Makes Your Teeth Whiter?

Question 1 of 3

Teeth get discolored when staining agents sink into which layer of the tooth?

  1. enamel
  2. dentin
  3. root
  4. all of the above

Question 2 of 3

The two most popular chemicals used to whiten teeth are carbamide peroxide and what else?

  1. carbon dioxide
  2. dihydrogen oxide
  3. enamel oxide
  4. hydrogen peroxide

Question 3 of 3

Two common possible side effects of teeth whitening are gum irritation and what else?

  1. cavities
  2. tooth sensitivity
  3. upset stomach
  4. headache

Check your answers online at https://www.wonderopolis.org/wonder/what-makes-your-teeth-whiter.