Conservative dentistry in its true sense is the preservation of the natural tooth structure rather than filling it with the best restorative materials. Tooth structure once removed will not come back, particularly enamel. Caries confined to the enamel must be approached in the most conservative way so that the enamel will be preserved rather than cutting it with a bur and filling it with a restorative material. This article describes the mechanism of remineralisation of enamel caries.

Keywords: Caries; Pathology; Remineralisation.