Cavity is caused by dental plaque that sticks to the teeth surface. When we eat, bacteria break down the sugar in food and produces acid in teeth. Saliva neutralizes acids and protects teeth but it must have enough time to work. If food is consumed often, acid will be produced constantly in mouth and causes cavities. Notice the number of times a child eats and drinks. The more often they eat, the greater the chance of cavities.
Some adults think tooth decay don’t matter since baby teeth fall out and are replaced. In fact the opposite is true. Baby teeth are replaced by permanent teeth by the time a child reaches 12 years old. Since the teeth remain in a child's mouth for a long period, healthy baby teeth pave the way for the development of healthy permanent teeth.
As a parent, you should check often to see if your child has any tooth decay. Adults and children often ignore obvious signs. So what are the causes of tooth decay?