الفهرس 
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Abstract
Aim of the study: To evaluate dento-skeletal changes after maxillary molars distalization using miniscrew-supported Hyrax appliance. Materials and Methods: This study included fourteen patients at an average age of 13.4 years with a bilateral class II molar relationship indicated for maxillary molars distalization. Distalization was performed using skeletally anchored Hyrax screw with sagittal opening direction until overcorrected class I molar relationship was obtained. Pre- and post-distalization cast and lateral cephalometric measurements were compared in terms of skeletal, dentoalveolar and soft tissue variables. Results: Maxillary first molars were significantly distalized in a mean period of 5.8 ± 2.2 months by 3.66 ± 1.4 mm and distally tipped by 3.50° ± 4.8° with insignificant intrusion, rotation and transverse movement. Premolars and central incisors showed significant distal tipping. There was significant decrease in SN-MP angle by 1.03° ± 0.9°. Conclusion: Maxillary molars distalization can be effectively accomplished using skeletally anchored Hyrax screw with no anchorage loss or increase in facial height. It is accompanied by spontaneous distal drift of premolars and incisors.