ADA Home Page
Catalog | Find a Dentist | Seal Program | Contact  
 
Dental Professionals Your Oral Health The ADA
Animations and Games
Careers
Students and Educators
Espanol
Events
Manage Your Oral Health
Media
Topics and Resources
A-Z TOPICS
GLOSSARY OF TERMS
HISTORY OF DENTISTRY
ORAL HEALTH LINKS

Oral Health Topics A–Z

Tooth Decay (Cavities/Caries)

 
Frequently Asked Questions (FAQ)
 

What is Tooth Decay?

Tooth decay is a destruction of the tooth enamel. It occurs when foods containing carbohydrates (sugars and starches) such as milk, pop, raisins, cakes or candy are frequently left on the teeth. Bacteria that live in the mouth thrive on these foods, producing acids as a result. Over a period of time, these acids destroy tooth enamel, resulting in tooth decay.

Return to Top

How Do I Prevent Tooth Decay?

You can help prevent tooth decay by following these tips:

  • Brush twice a day with a fluoride toothpaste.
  • Clean between your teeth daily with floss or interdental cleaner.
  • Eat nutritious and balanced meals and limit snacking.
  • Check with your dentist about use of supplemental fluoride, which strengthens your teeth, and about use of dental sealants (a plastic protective coating) applied to the chewing surfaces of the back teeth to protect them from decay.
  • Visit your dentist regularly for professional cleanings and oral examination.

Return to Top

Aren't Cavities Just Kid's Stuff?

No. Changes that occur with aging make cavities an adult problem, too. Recession of the gums away from the teeth, combined with an increased incidence of periodontal (gum) disease, can expose tooth roots to plaque. Tooth roots are covered with cementum, a softer tissue than enamel. They are susceptible to decay and are more sensitive to touch and to hot and cold. The majority of people over age 50 have tooth-root decay.

Decay around the edges, or margins, of fillings is also common to older adults. Because many older adults lacked benefits of fluoride and modern preventive dental care when they were growing up, they often have a number of dental fillings. Over the years, these fillings may weaken and tend to fracture and leak around the edges. Bacteria accumulate in these tiny crevices causing acid to build up which leads to decay.

Return to Top

Please note: The ADA does not provide specific answers to individual questions about fees, dental problems, conditions, diagnoses, treatments or proposed treatments, or requests for research. Information about dental referrals, complaints and a variety of dental procedures may be found here. You can also refer to our Frequently Asked Questions page for answers to common questions.

Quick Links
Animations: Brushing and Flossing
Cleaning Your Teeth and Gums
Dental Sealants
FAQ: Oral Changes With Age
Manage Your Oral Health: You & Your Dentist
Copyright 1995-2008 American Dental Association.
Reproduction or republication strictly prohibited without prior written permission.
See Privacy Policy (Updated 03/14/05) and Terms of Use for further legal information.
Link opens in separate window. Pop-up Blocker may need to be disabled. Link opens in separate window.
Pop-up Blocker may need to be disabled.
Member Only Content Member only content.