The regular removal of bacterial deposits as part of the oral hygiene routine at home is vital to the long-term success of any treatment for periodontitis. Recolonization with bacteria, which sooner or later leads to renewed plaque formation, takes place only a short time after teeth have been brushed or cleaned. Within this biofilm, the various bacteria organize themselves into a community in which they cooperate with each other. Embedded in a matrix, they are also better protected against external influences such as antibiotics. If this process is not stopped, it leads to the establishment of gingivitis, which can progress to periodontitis if left untreated.