Document Classification

Section Type: METHODS

Text: The home-use hydrogen peroxide (HP) bleaching agents PolaDay 7. 5 % (HP7. 5 ; SDI Limited, Bayswater, Victoria, Australia), PolaDay 9. 5 % (HP9. 5 ; SDI Limited) ; DayWhite ACP-7. 5 % (ACP7. 5 ; Discus Dental, Culver City, CA, USA) and DayWhite ACP 9. 5 % (ACP9. 5 ; Discus Dental), and the in-office agents PolaOffice 35 % (HP35 ; SDI Limited) and Opalescence XtraBoost 38 % (HP38 ; Ultradent Products, South Jordan, UT, USA) were applied to polished enamel slabs (N = 10) for 30 minutes/day for 21 consecutive days (home-use) or in one session a week, for 3 weeks (in-office).