Chronic form of pulpitis usually remains untreated, but inflammation penetrated deeper and spread on the surrounded tissue of the tooth. So develops periodontitis. As a result of inflammation pulp dies and inflammatory process extends into the surrounding tooth tissue. Bone tissue around the tooth with a dead pulp is destroyed. Destruction of bone tissue can be detected by X-ray examination of the teeth. With the weakening of the immune system infection in the tooth root canal might trigger inflammatory process, which is accompanied by constant pain. Endodontists in Arizona Dentistry insist that periodontitis should be treated regardless if it causes pain or not.