Penetration depth and enamel hardness effects of resin infiltrate and fissure sealant in MIH-affected molars: An in-vitro comparison

The low-viscosity RI penetrated more deeply into porous hypomineralised enamel of MIH-affected molars compared to the FS. RI increased enamel hardness and altered mineral content. These findings encourage clinical use of RI as minimally invasive treatment of mildly MIH-affected molars to prevent post-eruptive breakdown.