and tooth sensitivity (TS) after use of an in-office bleaching agent of 6% hydrogen peroxide
containing nanoparticles of nitrogen-doped titanium oxide (HP6) vs. 35% hydrogen peroxide
(HP35). Forty-eight volunteers were randomly divided either a HP6 or HP35. Two clinical
sessions were performed with an interval of 7 days between them for each group. In each
session, two consecutive applications of each bleaching agent were performed and …