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/index.php/wonder/what-makes-your-teeth-whiter.