Why Sharks Never Get Dental Cavities
Shark Teeth have built-in toothpaste. The outside of shark teeth is made up of fluoride, the active component of most toothpaste. Although human teeth are covered in a different mineral, both shark and human teeth are equally hard. Sharks never get cavities, and are able to replace their teeth multiple times throughout their lives. An in-depth look at shark teeth has found that they contain fluoride, the active ingredient of most toothpaste and dental care mouthwashes.