Periodontitis, or gum disease, is a common infection that damages the soft tissue and bone supporting the teeth. Without treatment, the alveolar bone around the teeth will gradually erode. Periodontitis means inflammation in the supporting structures around the tooth. Bacteria and other microorganisms stick to the surface of the tooth and in the pockets surrounding the tooth. As they multiply, the immune system reacts, leading to inflammation. Untreated periodontitis will eventually result in tooth loss and may increaseTrusted Source the risk of stroke, heart attack, and other health problems. Periodontitis is a chronic or long-term inflammatory disease. Good oral hygiene practices can help manage or prevent it. In this article, find out why periodontitis happens, who is at risk, and how to treat and prevent it.