Mandibular impacted canines were surgically exposed and bonded with buttons. The Quad-helix appliance was used for maxillary arch expansion; the reaction force when aligning the labially impacted canines assisted the mandibular expansion.
Figure 5
A 0.016 × 0.022 inch stainless steel Ricketts utility arch was inserted into tubes of the mandibular molars to intrude the anterior teeth.
Figure 6
The auxillary brackets and arch wires were added for torque control of the mandibular canines.
Figure 7
Post-treatment facial and intraoral photographs.
Figure 8
The occlusion changes of mandibular arch during the treatment (A: before treatment, B: 6 months, C: 12 months, D: 15 months, E: 20 months, F: 24 months, G: 30 months, H: 40 months).
Figure 9
Posttreatment dental casts.
Figure 10
The roots cross section view from the pre (A) and post (B) treatment CBCT (A:44, B:42, C:83, D:43, E:41, F:31, G:33, H:32, I:34).
Figure 11
Post-treatment radiographs and cephalometric superimposition (black lines: before treatment; red lines: after treatment).
Figure 12
Facial and intraoral photographs 2 years after treatment.
Cephalometric analyses before and after treatment.