Periodontal disease is a chronic, progressive destruction of tooth-supporting tissues such as the gums, periodontium and alveolar bone that occurs and can affect most teeth or even the entire mouth. The disease is usually asymptomatic in its early stages, and in its later stages, lesions such as loose teeth and periodontal abscesses may develop, resulting in tooth loss or tooth loss, loss of the integrity and destruction of the function of the masticatory organs. In addition, periodontal disease can become a focus of infection, causing lesions in other organs and affecting systemic health. Periodontal diseases include periodontitis, occlusal trauma, periodontal degeneration and periodontal atrophy. Periodontitis is extremely common in middle-aged and elderly people, and the number of people suffering from periodontal disease and its severity gradually increases with age. The clinical manifestations of periodontal disease: firstly, the gums are red, swollen and bleeding, which can be felt and observed subjectively by the patient. This is followed by periodontal pocket formation, which requires a doctor’s examination to detect, but patients can also notice receding gums, bleeding gums, overflowing pus, separation of gum margins from teeth, or even loose, elongated, displaced teeth, and feel sore gums and bad breath. Loose teeth are a sign that periodontitis has become severe. Periodontitis can also cause receding gums. People with periodontal disease should seek early treatment from a dentist.