Improved super-elastic Ti-Ni alloy wire for the angle class III patient with anterior open bite: A case report

Figure 1 Physical examination. A: Pretreatment facial photographs; B: Pretreatment intraoral photographs.

Figure 2 Posteroanterior radiographs confirmed no significant mandibular asymmetry or deviation from the mid-sagittal plane. A: Anteroposterior cephalogram; B: Lateral cephalogram; C: Panoramic radiograph.

Figure 3 Teeth movement changes during treatment. A-C: Treatment began with full-mouth direct bonding system and leveling using 0.016-inch × 0.022-inch Ti-Ni alloy wire; D-I: The anterior crossbite was corrected by lower canine distal drive with a closed coil spring and anterior retraction with a power chain; J-L: Class III intermaxillary elastics were used to achieve normal overbite and overjet by the 20 months.

Figure 4 Posttreatment photographs. A: Posttreatment facial photographs; B: Posttreatment intraoral photographs.

Figure 5  Polygon: Before and after active treatment.

Figure 6 Panoramic radiographs confirmed well-aligned parallel roots with no signs of root resorption. A: Anteroposterior cephalometric radiograph; B: Lateral cephalometric radiograph; C: Posttreatment panoramic radiograph.

Figure 7 Superimposition images: Pretreatment (black) and posttreatment (blue). A: Superimposed on sella-nasion plane at sella; B: Superimposed on palatal plane at anterior nasal spine; C: Superimposed on mandibular plane at menton.

Figure 8  Intermaxillary elastics to achieve better interdigitation.

Figure 9 Intrusion of the posterior teeth is applicable in high-angle open bite cases. Extrusion of the anterior teeth can be applied in low-angle open bite cases. After treatment, the patient’s facial profile improved significantly, and his chin appeared less prominent. A: Intruding posterior teeth will result in mandible counterclockwise rotation (mandibular plane angle reduced); B: Extruding the anterior teeth; C: Lateral profile change.