Seeing the dentist twice a year for a checkup might be too infrequent for some people with periodontal disease, while those with few risk factors might safely go longer between checkups, a study published in the Journal of Dental Research found. About 17% of high-risk patients who received twice-a-year care eventually needed a tooth extracted, compared with 22% of high-risk patients who visited a dentist only once a year. Researchers found no statistical difference in extraction rates between low-risk patients who saw a dentist once a year and those who went twice.

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