Gum disease, also called Periodontitis (per-e-o-don-TIE-tis), can be a severe gum infection affecting your overall health.... moreGum disease, also called Periodontitis (per-e-o-don-TIE-tis), can be a severe gum infection affecting your overall health. It can damage the soft tissue and, if left untreated, can destroy the tooth bone. You may also lose your tooth with Periodontitis.