Abstract
The objective of this study will be to evaluate in vitro the addition of a new bleaching agent containing sodium trimetaphosphate (TMP) nano-sized associated with 0.1% sodium fluoride and 35% hydrogen peroxide on color alteration, enamel mechanical and morphological properties. The bleaching gels will be: 1) 35% hydrogen peroxide (HP); 2) HP + 0.1% NaF (HP/F); 3) PH + 1% nano TMP (HP/TMP)…