Inclusion Criteria:All patients should satisfy the following criteria:-  Age range from 15-22 years. Malocclusion cases that require maxillary first premolars extractions followed by symmetrical canine retraction. All permanent teeth present, 3rd molars are excluded. Good oral and general health. No systemic disease/medication that could interfere with OTM. No previous orthodontic treatment.  Exclusion Criteria:  Patient diagnosed to have an indication for non-extraction approach. Poor oral hygiene or periodontally compromised patient. Patient with craniofacial anomalies or previous history of trauma, bruxism or parafunctions. Previous orthodontic treatment.