IRCT20180710040414N1 IRCT 2018-09-04 Ahvaz University of Medical Sciences Maxillary canine retraction changes with self-ligating ceramic brackets versus metal-slot ceramic brackets : A split-mouth randomized clinical trial Maxillary canine retraction changes with self-ligating ceramic brackets versus metal-slot ceramic brackets in the patient that need to extract two maxillary premolars: A clinical trial 2018-09-06 anticipated 16 Complete https://irct.ir/trial/32572 interventional Randomization: Randomized, Blinding: Single blinded, Placebo: Not used, Assignment: Parallel, Purpose: Treatment, Randomization description: In order to remove the non-selection error of the ceramic and ceramic self-adhesive bracket in the right or left canine teeth, a simple randomization method was used to extract random numbers from a third person using the website www.randomizer.org. Hidden methods. The allocation concealment of this test is that simultaneously with the patient's referral for a bonding of brackets to the right or left tooth, extraction of a random number by a third person, and the researcher was told which bracket would be placed on which side, Blinding description: All steps of treatment are explained to the patient and consent to treatment is the principle that a person must give permission before they receive any type of treatment, test or examination. Consent from a patient is needed regardless of the procedure. The patient does not know which tooth has a bracket. Using randomization is a reliable method of creating homogeneous treatment groups, without involving any potential biases or judgments. Groups are also identified by letters before being analyzed statistically and in this way, the parser will not know which groups are associated with which slice, etc. N/A Condition 1: Maxillary canine retraction. Condition 2: Maxillary canine rotation. Condition 3: Anchorage loss. Intervention 1: Intervention group: A group whose maxillary left or right canine attached ceramic self-ligating braces. Intervention 2: Control group: A group whose maxillary left or right canine attached common ceramic braces. Undecided - It is not yet known if there will be a plan to make this available Justification or reason for indecision in sharing IPD is Because patients are not informed about it, so when they accept, the data are published.