Sugar is the main cause of dental decay when there is bacteria present..
Snacking is one of the ways to cause tooth decay. Each time you eat or
drink something, it raises the acid level in your mouth. This is why, if you
must have juice or soda, it is best to drink it all in one sitting, instead of
sipping on it throughout the day. If you must snack or eat sugary snacks,
it is best to rinse your mouth afterwards to help bring the pH of the
mouth back to a healthy level. Of course, once you are done eating, it is
always best if you can brush and floss your teeth afterwards.
Eating healthier foods that have less sugar are not only better for your
overall health, but your teeth too. This way, the teeth are exposed to less
sugar. Another group of food that causes significant damage to teeth
structure is acidic foods. Things like lime, lemon and grapefruit, if in
frequent contact with teeth, can cause serious irreversible damage
(erosion) to your teeth.
You can also chew on sugarless gum that has Xylitol in it. There are
some studies that show that Xylitol helps keep the mouth healthier.