Evaluation of the Rate of En-masse Retraction in Orthodontic Patients With Maxillary Protrusion

Inclusion Criteria: * Adults and Adolescent patients (both genders) * Age range (14-24) * Patients with maxillary protrusion requiring first premolars extraction (Bimaxillary Protrusion or Class II division 1 cases). * Patients with fully erupted permanent teeth (not necessarily including the third molar). * Cases requiring maximum anchorage during retraction. * Good general and oral health Exclusion Criteria: * Patients suffering from any systemic diseases interfering with tooth movement. * Patients with extracted or missing permanent teeth. (except for third molars). * Patients with badly decayed teeth. * Patients with any parafunctional habits (i.e. Bruxism, tongue thrusting, mouth breathing, etc…). * Patients with previous orthodontic treatment