Full Thickness Mucoperiosteal Flap Versus Low Level Laser in Orthodontic Tooth Movement Acceleration

Inclusion Criteria: * o Free of any syndromes affecting the head region or any craniofacial injuries. * No history of previous orthodontic treatment * All of the permanent dentition present excluding third molars. * Good oral hygiene before starting treatment. * Cases indicated for extraction of the maxillary first premolars and canine retraction into the extraction space with maximum anchorage. * Malocclusion cases that allow initial stage of leveling and alignment without extraction. Exclusion Criteria: * o Patients with systemic diseases especially bleeding disorders and osteoporosis. * History of administration of corticosteroids, exogenous hormones and non-steroidal anti-inflammatory drugs (all drugs interfere with OTM). * Presence of previous history of oral surgeries in maxillary arch.