"There is also the simple fact that no amount of fluoride toothpaste can save teeth that are already severely decayed. However, such cases of tooth decay take a long time to manifest, thus, giving children and parents alike enough room to prevent them from ever happening. Since fluoride offers limited protection from tooth decay, parents would do well to bring their kids to a reputable Blanco dental practice for proper oral care.Food rich in refined sugars, like candies and sodas, tends to stick hard and doesnâ¤™t always get flushed out after regular brushing and flossing, thereby feeding oral bacteria that form decay-causing plaque. Some pediatricians are also convinced that even citrus fruits and some grains and vegetables can cause cavities when eaten raw. Given the prevalence of such ingredients, it isnâ¤™t entirely surprising why tooth decay is so common among kids, teens, and even adults.