Periodontal disease is an inflammation that occurs in the gums (commonly known as the dental bed), the periodontium (the ligament that connects the teeth to the alveolar bone), and the alveolar bone (the bone tissue that holds the teeth) and is caused by bacteria in the plaque that often adheres to the surface of the teeth. Periodontal disease in its early stages invades only the gums and is called gingivitis. The main symptoms are redness and swelling of the gums and bleeding when brushing or biting on hard objects. At this time, if timely treatment, the gums may be restored to health, otherwise it can further develop into early periodontitis, that is, on the basis of gum inflammation appears periodontal pockets, periodontal tissue repeatedly swollen, overflowing thick, and therefore patients will appear bad breath. At this time, if not actively treated, it will develop into advanced periodontitis, periodontal membrane and alveolar bone will be further destroyed, and teeth will be loosened and shifted until they fall out. If the affected teeth cannot be saved after treatment, they will have to be extracted and dentures will be placed.