Medically Reviewed by Jabeen Begum, MD on August 29, 2023
Question 1/14

The number of bacteria in your mouth is closest to the population of which of the following?

  • New York City
  • The United States
  • North America
  • Earth
Question 2/14

A dog's mouth is cleaner than a human's.

  • True
  • False
Question 3/14

If you drop food on the floor, it doesn't get germs on it if you pick it up within 5 seconds.

  • True
  • False
Question 4/14

Anyone who kisses someone with gum disease will always get it.

  • True
  • False
Question 5/14

If you find yourself without a toothbrush, it's a good idea to borrow a friend's.

  • True
  • False
Question 6/14

Which of the following items can transfer potentially dangerous microbes between people?

  • Lipstick
  • Drinking glasses
  • Band instruments
  • All of the above
Question 7/14

To protect your toothbrush from harmful germs, you should:

  • Leave it out in the open air
  • Store it in a closed container
  • Soak it in an antibacterial mouthwash
  • Microwave it for 15 seconds
Question 8/14

To avoid the buildup of bacteria, the American Dental Association recommends replacing your toothbrush every month.

  • True
  • False
Question 9/14

Antiseptic mouthwashes can keep your gums and teeth healthy.

  • True
  • False
Question 10/14

Drinking green tea may help keep your teeth and gums healthy.

  • True
  • False
Question 11/14

All bacteria are bad for the health of your teeth and gums.

  • True
  • False
Question 12/14

Most bacteria in your mouth live in plaque.

  • True
  • False
Question 13/14

Bacteria in your mouth can cause tooth decay by:

  • Eating tooth enamel
  • Releasing acids that weaken tooth enamel
  • Releasing sugars that destroy tooth enamel
  • All of the above
Question 14/14

Research has shown a link between gum disease and:

  • Cardiovascular disease
  • Diabetes
  • Alzheimer's disease
  • All of the above