Fig. 1

All patients were treated with the standard archwire sequence for mandibular extraction cases: 0.012″ round SE-NiTi, 0.016″ × 0.022″ SE-NiTi, 0.016″ × 0.024″ Stainless Steel with 13° of lingual root torque from canine to canine, optional 0.016″ × 0.024″ Stainless Steel with 21° of lingual root torque from canine to canine and a final 0.018″ × 0.018″ Beta-Titanium for finishing. En masse retraction with root torque control (13° extra torque) on 0.016″ × 0.024″ ribbonwise stainless steel archwire with double cable mechanics. The buccal transparent chain is fixed onto the lingual archwire between canine and lateral incisor with a lasso. If necessary, intermaxillary elastics could modulate anchorage