Carbonated beverages are soft drinks (non-alcoholic beverages) filled with carbon dioxide under certain conditions, such as soda, cola, etc. The pH value of 7 represents neutrality, and the pH value of the acidic components of carbonated beverages is generally between 2.2 and 4.9. Our teeth are mainly composed of minerals such as calcium and phosphorus, and when the acidic content of teeth reaches and falls below 5.5, they will be demineralized, that is, the mineral crystals will start to be dissolved by acid. If the teeth are eroded by acid for a long time, the teeth will be corroded and thinned, the enamel will be lost, the dentin will be exposed, and after the teeth lose the protective layer, it will be easy to occur decay. Many people like to drink acidic beverages, and these beverages can easily cause tooth erosion and demineralization, resulting in dentin exposure and making teeth sensitive. Liz Kay, scientific advisor of the British Dental Association, pointed out in the British Dental Journal that although carbonated beverages are not as acidic as vinegar, they are still highly acidic and their long-term consumption may lead to tooth damage. Nowadays, carbonated beverages can increase the chance of tooth decay in children, making the scope and speed of decay faster. In particular, he stressed that the average child drinking two cans of carbonated beverages per day is equivalent to eating 20 spoons of sugar. The acidity of carbonated beverages itself also disrupts the acid-base balance in the mouth, keeping teeth in an acidic environment. Soda, cola and other carbonated beverages are good for quenching thirst in the hot summer, especially many carbonated beverages with fruit flavor and aroma are sought after by many teenagers, and they feel very cool and exciting to drink. In the long run, teeth are always in a light acidic environment, and their mineral composition will be dissolved by little by little corrosion. In this way, even if you brush your teeth carefully every morning and evening and do not eat sugar, your teeth are still decayed. There will also be sore and weak teeth when eating hot and cold sweet and sour food, and the teeth will be sore and drooling when inhaling cold wind. This kind of decay caused by long-term consumption of cola type carbonated beverage is called “cola caries” in dental field. This kind of tooth decay is more difficult for doctors to treat and very painful for patients. Secondly, tooth pigmentation is a common problem in adults, but it appears in children, mostly due to drinking too much carbonated drinks and not paying attention to cleaning.