TABLE 1A.

Information of the tested home-bleaching products containing ≤6% hydrogen peroxide (HP) according to the manufacturer regarding their HP concentration, pH value, and exposure time.

Product name	Abbreviation	Company	Percentage HP	pH	Exposure time
Opalescence® PF 10%	OP 10CP	Ultradent Products, Inc., South Jordan, UT, United States	∼3.6%	6.5	6 h/day during 14 days
Philips ZOOM®! NiteWhite® 16%	PNW 16CP	Philips, Amsterdam, Netherlands	∼5.8%	6.0–7.0	6 h/day for 7 days
Philips ZOOM®! DayWhite® 6%	PDW 6HP	Philips, Amsterdam, Netherlands	6%	6.0–7.0	Twice a day for 30 min for a period of 14 days