Periodontal (gum) disease is a chronic bacterial infection that affects the gums and bone supporting the teeth. The word periodontal literally means 'around the tooth'. Periodontal disease can affect one tooth or many teeth. It begins when the bacteria in plaque (the sticky, colorless film that constantly forms on your teeth) cause the gums to become inflamed. In the mildest form of the disease, gingivitis, the gums redden, swell and bleed easily. There is usually little or no discomfort. Gingivitis is reversible with professional treatment and good oral home care. You may be at risk of gum disease if you answer yes to any of the following questions: Do your gums ever bleed? Are your gums...