Cavities occur when holes are formed in the teeth due to the erosion of enamel. Enamel is the tooth’s natural protection against cavities; a hard coating on the tooth. What causes enamel to erode is the attacking nature of plaque and bacteria, as well as an excess of acid. Once the enamel is worn down to the center of the tooth, bacteria gets into the hole, causing pain in the nerves the longer the cavity is left untreated.
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