Effect of pH of In-Office Bleaching Gels and Timing of Fluoride Gel Application on Microhardness and Surface Morphology of Enamel

Table 2

In-office bleaching agents used in the study.

Product	Composition
Pola Office liquid	35% Hydrogen peroxide 65% water,
Pola Office powder	Thickener, catalysts, dye, desensitizing agents (potassium nitrate) [14, 15]
Pola Office+	Aqua, hydrogen peroxide, sodium hydroxide, potassium nitrate [16, 17]