People with more cavities in their teeth may have a reduced risk for some head and neck cancers, a new study suggests. That’s because lactic acid bacteria produced by cavities may be protective against cancer cells, the study authors said. “This was an unexpected finding since dental cavities have been considered a sign of poor oral health along with periodontal disease, and we had previously observed an increased risk of head and neck cancers among subjects with periodontal disease,” said lead researcher Dr. Mine Tezal, an assistant professor at the University at Buffalo, State University of New York.
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