Best child dental clinic in 200 feet radial road. Preventing Tooth Decay with Regular Checkups Tooth decay is caused by sugars left in your mouth that turn into an acid, which can break down your teeth. Children are at high risk for tooth decay for a simple reason: many children and adolescents do not practice regular, good oral hygiene habits. Proper brushing and flossing routines combined with regular dental visits help keep tooth decay away. Your child should visit the dentist every six months for regular dental cleanings and checkups.