Factors influencing microbial growth in the human oral cavity

The human oral cavity is a significant contact point for diverse microbes. It allows frequent entry and exit of microbes through inhalation, exhalation, drinks, spitting, and consuming foods. The environmental conditions inside the cavity influence the selection, growth, and development of microbial communities. The conditions, in turn, are probably because of complex interaction and activities of various molecules of host and residential microbes. Further, oral ecology is influenced by the food habit of individuals and the community. The community of microorganisms may shift gradually or spontaneously depending on the physicochemical environment in the cavity. The presence of a group of organisms along with the food habit jointly may indicate the probable microbes succeeding. Understanding the relation complexity among the physiochemical nature of the oral cavity, the resident microbes, and individuals’ food habits may decipher the microbes to be attracted for succession. This review is for understanding the factors that influence the occurrence and refusal of oral microorganisms.