People who regularly drink soft drinks should pay attention. The latest study by American scientists found that soft drinks are very corrosive to teeth, and some of these carbonated drinks are more corrosive than the acid used in batteries.
experiment procedure
The research group at Southern Illinois University in the United States conducted an experiment on the corrosiveness of soft drinks to teeth. The team purchased 20 kinds of soft drinks from the market, including Coca-Cola, Pepsi, and Hedy, and immediately measured the pH after opening, and then cut the enamel slices from the newly extracted teeth, weighed and put into the drinks, and then removed them after 48 hours. The flakes are weighed again.
The experimental results showed that the weight of enamel flakes soaked in 7 types of beverages, including Coca Cola, Pepsi Cola, Crown Coke, Qixi, and Low-Heaven Qixi, was reduced by more than 5%.
The research team said that although no one will have drinks in the mouth for up to two days as in the experiment, the corrosiveness of the beverage will begin to appear and it will increase over time.
The latest research report was published in the American Dental Association's "Public Dentistry" magazine.
The conclusion is shocking
Any soft drink containing citric acid or carbonic acid can damage the teeth. Orange juice and sports drinks also corrode teeth, but cola drinks are more corrosive. In the first three minutes after taking, the corrosiveness of cola drinks is 10 times that of fruit juice drinks.
Most people think that soft drinks have no harm, or only that the sugar in them may make people fat. In fact, long-term drinking of beverages will corrode the enamel on the surface of the teeth.
The acidity of non-cola drinks is weaker than that of cola drinks, but the corrosiveness to teeth is also obvious. Citric acid is the most used acid material in non-cola drinks, and it is also a corrosive substance in beverages.
Expert advice
American Dental Association spokesman Kenden Rose said that the study found Crown Cola had the strongest acidity in soft drinks, with a pH of 2.387, followed by cherry cola with a pH of 2.522, Coca-Cola with a pH of 2.525.
pH is a measure of the acidity or alkalinity of a solution. It ranges from 0 to 14, and its value gradually decreases from low to high acidity. Alkalinity gradually increases. A value of 7 is a neutral solution, such as pure water at room temperature. . Some soft drinks have a pH comparable to the acid used in batteries.
Rose suggested: Use a straw to drink carbonated beverages to reduce the drink's contact with the teeth, and drink carbonated drinks only while dining.
All Reasons
The research team’s report incurs opposition from the American Beverage Association and is considered inconsistent with the facts.
Tracy Halliday, spokesman for the American Beverage Association, said: "The results of the study cannot be applied to real life. In reality, people's eating and drinking habits are different and influenced by many factors."
Richard Adamson, a scientific adviser to the American Beverage Association, pointed out that the research team did not take into consideration protection measures such as brushing. "The most protective of the oral cavity is saliva, which has the effect of dilution and mitigation. In the area of ​​oral hygiene, many other foods and drinks have the same effect as soft drinks, such as fruit, juice, pickles, salad dressings, and various types of wine. Dental erosion is not caused by a food or drink, but involves multiple factors. The key is to enjoy everything that should be appropriate."
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