title: [Epidemiology of periodontal diseases].
abstract: Periodontal diseases are classified to gingivitis and periodontitis. The high incidence rate of gingivitis is observed during school age, and periodontitis is for adults. Periodontal diseases belong to the category of the life-style-related diseases. The 8020 activity to keep 20 teeth until 80 years old was proposed in order to promote quality of the life (QOL) in our country under long life-expectancy. Periodontitis is one of the main causes of tooth missing. It has been clarified that the incidence time of gingivitis and periodontitis as the important point of prevention, or high risk area according to aging. Periodontal diseases can be controlled by the adequate risk management and oral health promotion.
authors.affiliation: Department of Oral Health and Preventive Dentistry, Meikai University School of Dentistry.
authors.forename: T
authors.initials: T
authors.lastname: Yasui