الفهرس 
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Abstract
Bracket bonding is a daily practice in orthodontic clinics and it is a major key to treatment success. The main goal of accurate bracket placement is to reach satisfactory aesthetic and occlusion and to reduce the finishing time. Indirect bonding is one of the bonding techniques which has different procedures and materials to facilitate the bonding process and save the chairside time. This randomized controlled clinical study was conducted to compare the accuracy of two IDB techniques (glue gun and vacuum material) in bracket transferring using the technology of IOSs. This study was carried out on 38 patients randomly divided into two groups; one positive control group and one experimental group of 19 patients in each group. Impression was taken and poured into extra hard stone, reference lines were drawn to accurately locate the bracket position and then brackets were attached to the model using water-soluble glue. The glue gun material tray was fabricated in group I, and in group II, there was the vacuum tray. After soaking the assembly (model with tray) in water, the tray with brackets was detached, cleaned and brackets transferred intraorally using light-cured adhesive. To compare the transfer accuracy of both materials, two scans were taken; image one for the working cast with brackets and image two for the bonded brackets in the patient mouth, the two images were superimposed and 12 points per bracket were identified to calculate differences between pretransfer and post-transfer bracket positions in three linear dimensions (vertical, horizontal and transverse) using software GOM Inspect Version 8 SR1. Comparison of deviation values between groups was performed using T-test with a level of significance was set to be ≤0.05. Clinical acceptability and directional deviation errors were also determined.