Effectiveness and one-year whiteness stability of different in-office bleaching agents and alternative protocols

9][20][21] The 35% HP has been the most widely used formulation for the in-office technique. 2,13,22,23Although studies have demonstrated adequate whiteness effectiveness 13,23 and patient satisfaction 13 with HP in-office bleaching, this technique may cause dentin sensitivity 5,7,11,13,14,20,22,24 immediately after its application. 7,13,22Alternatively, to avoid dentin sensitivity, CP in high concentrations may be used for in-office bleaching. 7However, although the sensitivity is reduced, less whitening effect has been reported compared with HP. 23