A comparison between two methods of canine retraction

INTERVENTION: Intervention 1: Using the active tieback for canine retraction. Intervention 2: Using NiTi coil spring for canine retraction in contralateral arch. Treatment ‐ Devices Using NiTi coil spring for canine retraction in contralateral arch Using the active tieback for canine retraction CONDITION: Fitting and adjustment of orthodontic device Orthodontic problem. ; Fitting and adjustment of orthodontic device PRIMARY OUTCOME: Space closure. Timepoint: Monthly. Method of measurement: Milimeters. SECONDARY OUTCOME: Anchorage loss. Timepoint: Monthly. Method of measurement: Milimeters. INCLUSION CRITERIA: INCLUSION CRITERIA: being in good health condition; do not have previous surgery and not taking medication; not having clenching or grinding, a first premolar extraction in each quadrant (no other extractions), upper and lower pre adjusted edgewise appliance “Roth prescription (Dentarum)” and signing informed consent. Exclusion criteria: using any drug during the study; if a bracket was deboned and if the patient misses any visit.