Comparative effects of integrated and post-applied nano-hydroxyapatite on enamel properties following high-concentration hydrogen peroxide bleaching.
PURPOSE This study investigated whether nano-hydroxyapatite (nHAp) can reduce the adverse effects of high-concentration hydrogen peroxide (HP) bleaching - such as mineral loss and surface softening - while maintaining whitening efficacy. Incorporation of nHAp into the bleaching gel was also compared with its applicatio...