Electronic cigarettes (e-cigarettes) are widely available, and their use is increasing worldwide. They are promoted as a safer alternative to com-bustible cigarette smoking and as an effective smoking cessation aid. E-cigarettes are designed to provide smokers with the desired nicotine dose without burning tobacco. They contain flavoured humectants that include nicotine in concentrations of 0–36 mg/mL. Evidence suggests that e-cigarettes are a better nicotine delivery method than combustible cigarettes
and have reduced adverse general and oral health effects, compared with combustible cigarettes. However, although e-cigarettes might be an acceptable harm-reduction strategy, the differential effects of e-cigarettes and combustible cigarettes have been based on self-reported perceptions. In addition, a growing number of young people, who have never engaged in combustible cigarette smoking, are smoking e-cigarettes, which may not be harmless. We analyzed peer-reviewed publications available through PubMed to summarize the effects of e-cigarettes on oral health.