Table 1: Distribution of specimens and study groups.

GROUP	ANTI OXIDANT USED	SUB GROUP	BONDING AGENT USED
Group I (Control)	None	n	5th Generation
(n=20)		(n=10)	(Prime & Bond NT)
No bleaching		B	7 th Generation
		(n=10)	(Xeno V)
Group II	None	A	5th Generation
(n=20)		(n=10)	(Prime & Bond NT)
Bleached		B	7th Generation
Specimens		(n=10)	(Xeno V)
Group III	10% sodium ascorbatesolution	A	5 th Generation
(n=20)		(n=10)	(Prime & Bond NT)
Bleached		B	7th Generation
Specimens		(n=10)	(Xeno V)
Group IV	5% proanthocyanidinsolution	A	5 th Generation
(n=20)		(n=10)	(Prime & Bond NT)
Bleached		B	7th Generation
Specimens		(n=10)	(Xeno V)