Table 2.

Coding of different subgroups.

	Group	Code	Description
No. 1	Control	V0	Unreinforced heat cured acrylic resin
No. 2	ZrO2	Z3	Heat cured acrylic resin reinforced with 3wt.% of ZrO2 NPs
		Z7	Heat cured acrylic resin reinforced with 7wt.% of ZrO2 NPs
No. 3	TiO2	T3	Heat cured acrylic resin reinforced with 3wt.% of TiO2 NPs
		T7	Heat cured acrylic resin reinforced with 7wt.% of TiO2 NPs
No. 4	SiO2	S3	Heat cured acrylic resin reinforced with 3wt.% of SiO2 NPs
		S7	Heat cured acrylic resin reinforced with 7wt.% of SiO2 NPs