This deposit consists of micro-organisms which are at the origin of the formation of dental decays, and of gingival and periodontal diseases.
When thin, the biofilm (dental plaque) can be translucent and impossible to see to the naked eye. As getting older, it is becoming thicker, and then, the appearance of the tooth may be matt and dull.
In order to make the biofilm (dental plaque) visible, revealing agents can be used. These agents colour the biofilm (dental plaque) in order to locate it.