Many people think tooth decay is the only threat to their smile, but there might be another danger lingering in your mouth. Gum disease is the leading cause of tooth loss, despite it being preventable. In fact, the Centers for Disease Control and Prevention estimates at least 50% of adults have a form of the condition. If you have periodontal disease, time is of the utmost importance. With the right care at the first sign of the infection, your dentist can save your smile from any long-term complications.