RESIN INFILTRATION – A NARRATIVE REVIEW OF PROPERTIES Resin infiltration ICON® has made it possible to treat initial caries lesions in a novel manner that is consistent with the concept of minimal intervention dentistry. Infiltration of caries lesions is a novel technique for treating non-cavitated lesions on the proximal and smooth surfaces of primary and permanent teeth. The greatest benefit of this method is that it is non-invasive, preserves tooth structure and can be completed in a single visit. This narrative review intends to discuss the properties of the material, its clinical applications and its effectiveness in terms of caries inhibition and esthetics effect, surface roughness, microhardness and penetration ability. There are a number of high-quality studies that support the use of ICON® in arresting non-cavitated proximal caries lesions in primary and permanent teeth. However, the masking ability in managing anterior white spot lesions and fluorosis is still doubtful. Among the material limitations were its questionable long-term color and material stability.