[Table/Fig-2]:

Sample size, Distribution of teeth and brackets into 6 groups

Groups	Colour coding acrylic blocks	Recycling procedure	No of stainless steel brackets		No of extracted premolar teeth
Group I	White	New brackets	20 (Group A)		20 (Group B)
			Control	Test	1st Bonding (B1)	2nd Bonding (B2)
Group II	Brown	Adhesive Grinding	20	20	20	20
Group III	Blue	Sandblasting	20	20	20	20
Group IV	Yellow	Thermal flaming	20	20	20	20
Group V	Red	Buchman	20	20	20	20
Group VI	Green	Acid bath	20	20	20	20