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Tobacco smoking is the primary risk factor for periodontal disease, but cannabis smoking could also be a contributor. Researchers in New Zealand prospectively assessed cannabis exposure from age 10 to 32 and periodontal disease at ages 26 and 32 in a cohort of 1015 people who were born in 1972 or 1973.
Among the 903 participants who were followed through age 32, 47% reported a mean of 1 to 40 exposures to cannabis yearly (some-exposure group), 20% reported a mean of >40 exposures yearly (high-exposure group), and 32% reported no exposure. Half the cohort were current or former tobacco smokers. At age 32, 29% of participants had some periodontal disease (measured by gingival recession and loss of gingival attachment).
After controlling for tob…