PMC6755289_01
Pretreatment facial and intraoral photographs.
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During the clinical assessment, it was noted that the deciduous lower canines were still present and a class I malocclusion with crowding, deep bite, and a straight profile was diagnosed (Figure 1).
(a) Pretreatment lateral cephalogram. (b) Pretreatment panoramic radiograph.
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In the lateral cephalogram X-ray, it is possible to see that both canines were towards the vestibular side; however, the right one was closer to the incisors' roots (Figure 2).
Intraoral photographs. Both golden chains are tied up to the distal end of their respective open coil to start the traction of the impacted canines.
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At the same time, to open the space for the canines, a couple of open coil springs were placed and the golden chain was ligated to the distal end of each one to initiate the traction with an up-and-distal vector (Figure 3).
(a) An intraoral photograph of the quadrant 3 accessorial wire tied up to the golden chain. (b) Progress panoramic radiograph.
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As can be seen in Figure 4, the accessorial wires were tied around the SS wire and their mesial ends were introduced through the link closest to their respective chains (left and right).
Intraoral photographs showing the accessory wire used to move the crown of the left canine away from the incisors' roots: (a) in its passive manner; (b) once it has been activated.
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The distal end was bent to tie up a power chain that would exert a force with a distal vector (Figure 5).
Posttreatment facial and intraoral photographs.
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After three years of treatment, the brackets were removed and a fixed retainer was placed in the lower arch while a Hawley retainer was given for the upper section with the indication of full-time use.  Figure 6 shows the case's final photographs.