Cannabis smoking has become much more common (and acceptable) in recent years. Recreational marijuana is legal in twenty states, and medical marijuana is legal in thirty-six. According to the CDC, 18 percent of Americans used marijuana in 2019. 1 It is estimated that about 90 % of users smoke it. 2 Smoking may negatively affect the mouth, teeth, and gums. Negative effects include periodontitis (gum disease), caries (tooth decay), xerostomia (dry mouth), a decreased salivary pH (increased acidity), and an increase in the density of Candida albicans (yeast infection, thrush). 3 This post will only discuss dental problems associated with the legal smoking of marijuana by adults; I will not touch upon other routes of ingestion of marijuana or its effects on any other part of the body other than the mouth.
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