Table 1.

Materials tested in the present study.

Material	Type	Composition	Filler Content % (w/w)	Manufacturer	Lot #
Filtek Supreme XTE	Nanofilled composite	Matrix: Bis-phenol A diglycidylmethacrylate (Bis-GMA), triehtylene glycol dimethacrylate (TEGDMA), urethane dimethacrylate (UDMA), bis-phenol A polyethylene glycol diether dimethacrylate Filler: silica nanofillers (5-75 nm), zirconia/silica nanoclusters (0.6-1.4 μm)	78.5 (w/w)	3M ESPE, St Paul, MN, USA	N748173
G-aenial	Microfilled hybrid composite	Matrix: urethane dimethacrylate (UDMA), dimethacrylate co-monomers. Filler: silica, strontium, lanthanoid fluoride (16-17 μm), silica (>100 nm) fumed silica (<100 nm)	76 w/w	GC Corporation, Tokyo, Japan	151029A
Admira Fusion	Nanohybrid Ormocer based composite	Matrix: resine Ormocer Filler: silicon oxide nano filler, glass ceramics filler (1 μm)	84 (w/w)	Voco, Cuxhaven, Germany	1601121
Gradia Direct	Microfilled composite	Matrix: urethanedimethacrylate (UDMA), dymethacrylate camphorquinone Filler: fluoro-alumino-silicate glass silica powder	73 (w/w)	GC Corporation, Tokyo, Japan	150527A
Essentia	Microfilled hybrid composite	Matrix: urethane dimethacrylate (UDMA), Bis-MEPP, Bis-EMA, Bis-GMA, TEGDMA Filler: prepolymerised fillers, barium glass, fumed silica	81 w/w	GC Corporation, Tokyo, Japan	151109C
Ceram.X Universal	Nanoceramic composite	Matrix: methacrylate modified polysiloxane, dimethacrylate resin, fluorescent pigment, UV stabilizer, stabilizer, camphorquinone, ethyl-4 (dimethylamino) benzoate, iron oxide pigments, aluminium sulfo silicate pigments. Filler: Barium-aluminium borosilicate glass (1.1-1.5 μm), Methacrylate functionalized silicon dioxide nanofiller (10 nm)	76 (w/w)	Dentsply De Trey, Konstanz, Germany	1507000661
Estelite Asteria	Supra-nano spherical hybrid composite	Matrix: Bis-phenol A diglycidylmethacrylate (Bis-GMA), Bisphenol A polyethoxy methacrylate (Bis-MPEPP), triehtylene glycol dimethacrylate (TEGDMA), urethane dimethacrylate (UDMA) Filler: Supra-nano Spherical filler (200nm spherical SiO2-ZrO2), Composite Filler (include 200nm spherical SiO2-ZrO2).	82 (w/w)	Tokuyama Dental corporation, Taitou-kuTokyo, Japan	6,6E+17
Gradia Direct Flo	Flowable Microfilled hybrid composite	Matrix: Modified UDMA, EBPADMA, TEGDMA Filler: Ba–Al–F–B–Si–glass, St–Al–F–Si–glass 68 wt%, 44 vol%		GC Corporation, Tokyo, Japan	160602A
SureFil SDR flow	Bulk Fill Flowable	Matrix: Modified UDMA, EBPADMA, TEGDMA Filler: Barium-alumino-fluoro-borosilicate glass, strontium alumino-fluoro-silicate glass 47,3 vol%		Dentsply De Trey, Konstanz, Germany	1703001234