Inclusion Criteria:  Growing Class III patients with a prepubertal stage of skeletal maturity according to the cervical vertebral maturation method. Skeletal Class III malocclusion with maxillary deficiency (ANB, <0°; N perp-A<1mm) with or without mild mandibular prognathism. Late mixed or early permanent dentition at the start of treatment characterized by a Wits appraisal of -1 mm or less and an Angle Class III molar relationship or anterior crossbite. Vertically normal growth pattern determined by cephalometric radiographs. Patients are free from developmental or congenital conditions such as cleft lip/palate or other craniofacial anomalies. No previous orthodontic treatment.  Exclusion Criteria:  Poor oral hygiene or periodontally compromised patient. Patients with craniofacial anomalies or previous history of trauma, bruxism, or parafunctions. Previous orthodontic treatment.