Table 1.

Materials used in this study.

Material	Type	Organic matrix	Inorganic filler	Filler % wt	Filler % vol	Batch Number	Shade
Grandio (Voco, Cuxhaven, Germany)	Nanohybrid composite resin	TEGMA, BIS-GMA	Spherical nanoparticles of silicon dioxide 0.02–0.05, size-matched vitro ceramics	87	71.4	#531919	A 3,5
Filtek Z250 (3M ESPE, St. Paul, Minn, USA)	Microhybrid composite resin	BIS-GMA, UDMA, BIS-EMA	Circonium-silicon particles 0.01–3.5 (average: 0.6)	78	61	#20050104	A 3,5