Table 1.

Compositions of the composite resin tested.

Materials	Type	Composition	Filler content
Grandio SO (Voco)	Nanohybrid	Inorganic fillers in a methacrylate matrix (Bis-GMA, TEGDMA, UDMA).	89% w/w
Amaris (Voco)	Microhybrid	Inorganic fillers in a methacrylate matrix (Bis-GMA, UDMA, TEGDMA).	80% w/w
Filtek Z350 XT (3M/ESPE)	Nanofill	Inorganic fillers in a methacrylate matrix (Bis-PMA, UDMA, Bis-GMA, TEGDMA).	78.5% w/w
Filtek P90 (3M/ESPE)	Microhybrid	Silorane resin, particles of quartz, fluoride itreo, stabilizer, Initiator, Pigments.	76% w/w