Periodontal diseases can be accelerated by a number of different factors. However, it is mainly caused by the bacteria found in dental plaque, a sticky colorless film that constantly forms on your teeth. If not carefully removed by daily brushing and flossing, plaque hardens into a rough, porous substance known as calculus (or tartar).

Bacteria found in plaque produces toxins or poisons that irritate the gums, which may cause them to turn red, swell and bleed easily. If this irritation is prolonged, the gums separate from the teeth, causing pockets (spaces) to form. As periodontal diseases progress, the supporting gum tissue and bone that holds teeth in place deteriorate. If left untreated, this leads to tooth loss.