This document discusses dental disease prevention and prophylaxis at different levels. Primary prevention aims to maintain good oral health through education, fluoride, sealants, nutrition and plaque control. Secondary prevention treats early signs of disease to prevent progression through education, fluoride and removing plaque and tartar. Tertiary prevention focuses on recovery, preventing advanced disease, and decreasing disability through specialist treatment. The overall goals are to reduce the prevalence and severity of dental caries and periodontal disease.