Figure 7
Upper fixed palatal appliance with torquing spring used with our patient. Top: the appliance was constructed from two molar band connected by palatal arch. A 19 × 25 stainless steel (ss) wire was extended from the molar bands to the palatal side of the upper lateral incisors. Middle: the palatal root torque was delivered to the lateral incisors by activation of the torquing spring. Bottom: tip edge brackets were bonded to the palatal surface of the upper lateral incisors and were ligated to the ss wire by using a steel ligature.