Periodontal Disease or Periodontitis is an inflammation of the gum, i.e. the tissue holding the tooth. If left untreated, it can lead to bad breath and eventually, tooth loss, and it is the primary cause of tooth loss in adults.
Gums may become inflamed due to the bacteria contained in the plaque on the surface of the tooth. If it is left untreated, it can affect the gums, bones and other supporting tissues of the teeth. It leads to a pocket forming between the root of the tooth and the gum where bacteria can quickly proliferate, and calculus develop.