Prepare a vacuum-formed or a silicone impression tray. If you use a vacuum-formed tray, we recommend 0.7mm. This type of tray is cheap, predictable and easy to prepare. Etch patient's teeth with an etching solution for 30 seconds. Rinse with water for 15 seconds and air dry for 30 seconds.
Paint resin A on the teeth with a small brush and resin B on the composite in the brackets tray.
Position the tray over the teeth and apply equal pressure all over the tray for 30 seconds. Let the adhesive set for 2 additional minutes and remove it using a scaler or an orthodontic plier. The initial arch wire can now be inserted. A thermoformed 2.0-mm disk can be prepared on the normal 0.7mm tray to obtain a rigid envelope that can assure stable and uniform pressure. Trim the 2.0-mm tray in a shape that covers only the occlusal edge of the teeth.