The best way to prevent dental caries is to visit your dentist and get properly informed on how to take care of your teeth and know the importance of your teeth. At home, you can brush your teeth at least twice a day especially before going to sleep.  Flossing is a good way of taking out food debris in between teeth.  Using toothpaste with fluoride can help strengthen teeth and remineralising the outer layer of the teeth or enamel.