Clinical Research of a New Movable Molar Distalization Appliance

【Objectives】 This study was designed to evaluate the treatment effects of a new movable molardistalization appliance for distal movement of maxillary first molars on Angle's Class Ⅲ malocclusion adolescence patients with the second premolar crowded. 【Methods】 Sixteen patients were treated by a new movable molardistalization appliance. Cephalometric analysis and model measurement was carried out before and after the treatment. Data were analyzed by paired t-test. 【Results】 The molars were distalized 5 mm during an average time of 3.8 months. There were significant increases in the Angle SNA and A-NPg (P 0.05). 【Conclusion】 It was a effective way to get space and improve patient's profiles on Angle's Class Ⅲ malocclusion adolescence patients with the second premolar crowded by the new movable molardistalization appliance. It was also conducive to patient's oral hygiene.