E-cigarettes or electronic cigarettes, are considered as a healthier alternative to conventional combustible cigarette smoke. Increasingly in vogue since they have been launched, they are popular among people wishing to reduce their consumption of combustible cigarettes, but have also conquered young people such as teens who have never smoked before. However, e-cigarettes can also have a negative impact on health. They contain toxic substances and nicotine levels comparable to traditional cigarette smoke, which cause inflammatory reactions. This is a cause of an oral microbiota dysbiosis. An oral microbiota altered with electronic cigarettes 119 volunteers were recruited and randomised into 3 groups [...]