Crunchy vegetables, cheese, nuts, and water are friends to your teeth; they stimulate saliva and are low in fermentable sugar. Sticky sweets, sipping sugary drinks, and constant snacking keep the mouth in a prolonged acid attack.
Calcium and vitamin D build strong teeth and jawbone, while too much acid from soft drinks and citrus erodes enamel. Eating sweets with meals rather than between them gives saliva time to neutralise the acid and repair the surface.