Abstract
A number of periodontal diseases, some forms of which can be aggressive, can affect children and adolescents. Plaque is the key aetiological agent but local and systemic factors that can modify the response of the periodontal tissues to plaque may be identified from the history and during examination of the child or adolescent. Periodontal screening should be an integral part of the dental examination of younger individuals. It can be used in conjunction with the history and examination to reach a diagnosis, which then forms the basis for future management.