TABLE 1B.

Information of the tested in-office bleaching products containing ≤6% HP according to the manufacturer regarding their HP concentration, pH value, and exposure time.

Product name	Abbreviation	Company	Percentage HP	pH	Exposure time
Philips ZOOM®! 6%	PZ 6HP	Philips, Amsterdam, Netherlands	6% activated by a blue LED light (Philips Zoom® WhiteSpeed)	7.0–8.5	Four times for 15 min
Magic White® 0%	MW 0HP	Drogenbos, Belgium	0%	–	Cleaning specimens with a finger brush; prefabricated tray, inserted in the mouth and activated by a LED light for 21 min
Smartbleach® 6%	SB 6HP	Smartbleach International, Herzele, Belgium	6% activated by a green LED light (Smartlight 3LT)	9.5–10.0	Activated three times for 9 min