Bacteria interacts with the food you eat to produce waste items by using acids, which start a breakdown or demineralization of areas beneath tooth surface. This overview of your tooth surface is tooth decay.
Look at it this way: Every time you eat, there's an acid attack to the tooth. A counterattack because of your body occurs by rinsing their food and acid away with saliva. The saliva not only buffers or neutralizes the acids, in addition, it contains minerals (calcium and phosphate) that rebuild the places with the tooth that had been dematerialized or attacked by the acids. This rebuilding process is referred to as demineralization. This combination of attacking and rebuilding is sort of tug-of-war as part of your mouth. It's body's strategy for helping protect the teeth from everyday problems. But by fully learning the reason for dental cavities, and by investigating each of the three factors more closely, we will look at alternative methods of preventing tooth decay. The possible ways to help avoid tooth decay.(Dental Burs)

Sealants: The deep grooves and pits using some teeth, including molars, can even be troublesome areas for decay. One method to prevent such type of decay should be to have your dental team paint a shaded plastic-type material known as a pit and fissure sealant on these areas. If the sealant hardens, it acts as a barrier protecting the tooth surface from plaque and acids.(alan dental)
Fluoride Supplements: Fluorides also play a tremendous role in preventing decay. By having fluoride to your water or together with a fluoride rinse in your daily oral routine, it is possible to help safeguard teeth from cavities and bacteria. Fluoride supplements are also available and will help keep region cleaner, healthier.
Fluoride Toothpaste: The most effective ways to prevent mineral loss with the tooth or demineralization and help the replacement process or demineralization is by using toothpaste which contains fluoride. A smaller amount used daily helps balance the tug-of-war situation for your benefit. Many studies for a long period of time have proven this to be probably the most efficient ways to prevent tooth decay. Brand new advances in toothpaste technology make this better yet by including antibacterial components, including the tin in stannous fluoride.