Cavities are almost 100% preventable. Since tooth decay is the #1 chronic condition in children and 90% of adults, 20-64 years old have at least one cavity, it would probably be best we do everything we can to prevent them. Sealants are a great way to help kids not get cavities. Be sure to also never share forks, spoons, straws and food as this spreads germs that cause tooth decay. And as always, be sure to brush and floss at least twice a day for 2-3 minutes at a time.