Marijuana and hashish use associated with over four times higher odds of severe periodontitis

Among 3,690 NHANES participants (2011-2014), 54% reported ever using marijuana or hashish. Marijuana/hashish use was significantly associated with severe periodontitis, affecting 39% of users (adjusted OR: 4.276, 95% CI: 3.682-4.967, P=0.001). Cocaine use was also linked to periodontitis but primarily mild disease. Alcohol consumption showed a smaller positive association (OR: 1.255). No significant associations were found for heroin or methamphetamine use.

Cross-sectional analysis of NHANES 2011-2012 and 2013-2014 cycles. 3,690 participants with demographic information, clinical periodontal examinations, and drug use questionnaires. Logistic regression models adjusted for age, sex, race/ethnicity, education, income, marital status, occupation, alcohol, BMI, dental insurance, and dental visit frequency.

Periodontitis affects millions of adults and is linked to systemic health conditions including cardiovascular disease and diabetes. If cannabis use substantially increases periodontal disease risk, this has implications for dental screening and patient counseling as cannabis use becomes more widespread.

The oral health effects of cannabis use have received far less attention than respiratory or cardiovascular effects. This finding of a strong association with severe periodontitis adds dental health to the growing list of health domains where cannabis use may have meaningful consequences.

Cross-sectional NHANES design cannot establish causation. Self-reported drug use may be inaccurate. Cannabis smoke exposure patterns (frequency, duration, method) were not fully characterized. Residual confounding from unmeasured factors like oral hygiene practices is possible.