Bracket Bonding Technique for Orthodontic Treatment

All the instruments used in this study were brand-new. Before bonding, the buccal surfaces of the teeth were cleansed with fluoride-free pumice and water andthen dried for 10s by air spray.^{5 (link)}The buccal surfaces of the samples were etched with 37% phosphoric acid gel (3M/Unitek, Monrovia, USA) for 15s,rinsed with water spray for 10s and dried with air spray until chalky appearance of enamel was observed. After application of a thin layer of Transbond XT Primer-Adhesive (3M/Unitek, Monrovia, USA) on the enamel,^{5 (link),13} Transbond XT (3M/Unitek, Monrovia, USA) light-cured adhesive was applied on the bracket base and placed mesio-distally and occluso-gingivally at the center of the buccal surface on the long axis of the crown firmly by one orthodontist until a tight contact was achieved.^{8 (link),14} The adhesive was light-cured with the use of a light-curing unit for 10s on the mesial aspect and for 10s on the distal aspect of the bracket.¹³