Dental techniques have improved greatly in the past few years, but once teeth have been damaged by cavities they can never be restored to their original condition. It is of the highest priority, therefore, to prevent cavities from developing in the first place. By the end of the 19th century, it had been determined that cartes are caused by cariogenic bacteria. The cariogenic bacteria first produce non-watersoluble glucan from sugar or other foods, and this glucan adheres to the tooth enamel as hard plaque. Next, they feed on sugar to generate acids such as lactic acid in the plaque. These acids then dissolve the tooth enamel. That in brief is the mechanism of cavity production.
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