Normal Bacterial Flora of The Oral Cavity

The oral cavity is a biopolitical environment, very similar to the gastrointestinal microenvironment, which hosts billions of microorganisms known collectively as oral microbiota. These bacteria were shown to have important functions within the host oral ecosystem as they inhibit the attachment of pathogenic microorganisms and actively participate in the immune reaction of the host. Gingival crevices harbor various types of bacteria and are typically part of a balance; any disparity could result in oral disease such as dental caries, periodontal diseases, even systemic infections. This article systematically summarises the regular bacterial microbiota in the oral cavity, a description of its functions, and the aspects which precipitate the changes in bacterial flora