Maxillary incisor torque control is critical during space closure, particularly in cases of severe protrusion with minimal crowding. This presentation introduces the design, biomechanics, and clinical applications of the Double-J retractor—a customized appliance supported by palatal miniscrews that enables controlled, bodily retraction of the maxillary incisors. The force system is designed to direct the retraction force vector through the center of resistance of the anterior segment, while auxiliary torquing springs guided by palatal miniscrews provide additional torque control. Cephalometric superimpositions from clinical cases demonstrate excellent anchorage preservation, torque control, and vertical control, especially when combined with a transpalatal arch and cantilever clips. A finite element analysis was also conducted to examine the optimal placement of miniscrews and the magnitude of activation. The biomechanical principles of the Double-J retractor closely resemble those of Dr. Burstone’s torquing arch, making it an effective option for managing high-angle Class II protrusion cases with upright incisors and bony protrusion. Furthermore, this system allows for esthetic retraction without fixed appliances and may be integrated with clear aligner therapy, offering versatility in complex treatment scenarios.
Guest Speakers

James, Ying K. Tseng
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Chiung-Hua Huang
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Nien-Shan Yang
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Johnny Liaw
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Eric Liou
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Shih-Jaw Tsai
Taiwan- Speech Topic
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Hui-Chen Tsai
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Johnson Hsin-Chung Cheng
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