Theoretical aspects of oral diseases prevention; current status in oral health and preventive measures; psychsocial aspects of oral health behaviour; Oral biology in prevention of dental caries and periodontal diseases; Dental plaqueand plaque control; Saliva; Principles of oral hygiene practices; Oral galvanism; Prevention in periodontology; Fluorides; antibacterial prophylaxis; Prevention of orthodontic anomalies; Special preventive care of compromised patient;Nutrition in prevention of oral diseases.