PMC9974306_01
(a) Initial extraoral frontal rest:extraoral frontal smile and initial extraoral left and right profile photographs. (b) Pretreatment intraoral upper and lower occlusal image, right and left lateral photographs. (c) Pretreatment model cast.
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fig1
On extraoral examination, facial asymmetry was observed, and his chin was deviated to the left side (Figure 1(a)). A crossbites of teeth #12, #15, #22, #24, #34, and #35 were present (Figures 1(b) and 1(c)).
Pretreatment panoramic, antero-posterior, and cephalometric radiographs.
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fig2
Intraoral views of treatment. Start of leveling and extraction of teeth #14, #25, #34, #44 and lingual arch for anchorage. Lace back between teeth #47 and #43 to distalize the canine, coil spring open between teeth #21 and #23 applied to close the extraction space and to correct the midline deviation. 0.020 x 0.020 NiTi wire upper and lower arch with band back.
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fig3
Intraoral views of treatment. Coil spring open between teeth #12 and #13 to correct midline. In lower arch, coil spring closed between teeth #47 and #43, and hook to close post-extractive space. 0.019 x 0.025 stainless steel wire in upper arch with superspee and surgery arch lock in distal position to teeth #22 to close the post-extractive space. 0.016 x 0.022 NiTi wire in lower arch with antispee.
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fig4
In the lower arch coil, spring closed between teeth #47 and #43 and hook to close post-extractive space (Figure 4).