Acids in the mouth can dissolve away tooth surfaces. Given the chance, teeth will repair themselves, using minerals from saliva. But if acid is in the mouth too aften, teeth cannot repair themselves and the hard tooth surface (the enamal) becomes thinner-this is called ‘erosion’.
The teeth can then become etra sensitive to hot and cold food and drink. Eroded teeth can also be more likely to suffer decay.
The main cause of erosion is too frequent consumption of certain kinds of food and drink. All fizzy drinks, all sports drinks, all squashes and all fruit juices are acidic to varying degrees. Pickles and citrus fruits are examples of acidic types of food.