Effect of Four Bleaching Regimens on Color Changes and Microhardness of Dental Nanofilled Composite

Table 1

Characteristics of restorative material used in the study (manufacturers’ informations).

Material	Manufacturer	Shade	Material type	Matrix	Filler size	Filler Volume
Filtek Supreme XT	3M ESPE	A3E	Nanofilled composite	Bis-GMA, Bis-EMA, UDMA, TEGDMA.	Agglomerated/non-aggregated of 75 nm silica nanofiller and a loosely bound agglomerate silica nanocluster consisting of agglomeratesof primary silica nanoparticles of 75 nm size fillers. The cluster size range is 0.6–1.4 microns.	72.5%