First, the nutrients in the saliva are adsorbed on the surface of the teeth, forming the fertile "soil" of the "community", that is, the formation of an acquired film. This process can be formed in a few minutes on the freshly cleaned tooth surface, and it will thicken rapidly in 1-2 hours.
After the "soil" is formed, it can attract bacteria to settle, and at the same time provide nutrients for bacteria, that is, bacteria adhesion and copolymerization. First, there will be pioneer bacteria to settle, cultivate the soil, and establish the basic facilities of the community, and then more other bacteria will be attracted to settle, and an "emerging community" is born.
If there is no human destruction, the "emerging community" will quickly develop and become a "mature community", that is, the plaque matures. Many bacteria gather together to provide nutrients to each other, and at the same time absorb nutrients in saliva, bacteria proliferate in large quantities, the "community" structure is also closer, and can resist external interference together, which cannot be removed by gargle. Generally, it can develop into a complex and mature "community" with various bacteria in 9 days.