A Periodontics Thesis

The red complex is a group of bacteria that are categorized together based on their association with severe forms of periodontal disease. The red complex—among a number of other complexes—were classified by Sigmund Socransky in 1998. The three members of the red complex are:Porphyromonas gingivalis,Tannerella forsythia Treponema denticola . There presence in the oral cavity causes changes in hydrogen ion concentration .