You can get fluoride by :
Drinking fluoridated water from a community water supply; about 74 percent of Americans served by a community water supply system receive fluoridated water. (If you have well water, see "Private Well Water and Fluoride" from the Centers for Disease Control and Prevention.)
Brushing with a fluoride toothpaste
If your dentist thinks you need more fluoride to keep your teeth healthy, he or she may —
Keep an eye on how often your child eats, as well as what she eats.
Your child's diet is important in preventing a cavity. Remember every time we eat or drink something that contains sugar or starches, bacteria in our mouth use the sugar and starch to produce acids. These acids begin to eat away at the tooth's enamel.
Our saliva can help fight off this acid attack. But if we eat frequently throughout the day -- especially foods and drinks containing sugar and starches - the repeated acid attacks will win the tug of war, causing the tooth to lose minerals and eventually develop a cavity.
That's why it's important to keep an eye on how often your children eat as well as what they eat.
Tooth-friendly tips :
Limit between-meal snacks. This reduces the number of acid attacks on teeth and gives teeth a chance to repair themselves.
Save candy, cookies, soda, and other sugary drinks for special occasions.
Limit fruit juice.
Make sure your child doesn't eat or drink anything with sugar in it after bedtime tooth brushing. Saliva flow decreases during sleep. Without enough saliva, teeth are less able to repair themselves after an acid attack.
Make sure your child brushes
Brushing with fluoride toothpaste is important for preventing cavities.
Here's what you should know about brushing :
Talk to a dentist about sealants
Dental sealants are another good way to help avoid a cavity. Sealants are thin, plastic coatings painted onto the chewing surfaces of the back teeth, or molars. Here's why sealants are helpful: The chewing surfaces of back teeth are rough and uneven because they have small pits and grooves. Food and bacteria can get stuck in the pits and grooves and stay there a long time because toothbrush bristles can't easily brush them away. Sealants cover these surfaces and form a barrier that protects teeth and prevents food and bacteria from getting trapped there.
Since most cavities in children and adolescents develop in the molars (the back teeth), it's best to get these teeth sealed as soon as they come in :
Take your child to the dentist for regular check-ups
Visit a dentist regularly for cleanings and an examination. During the visit the dentist or hygienist will :