PMC5090803_01
Pre-treatment facial, intraoral photos and radiographs.
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The oral soft tissues were unremarkable (Fig. 1).
Cone-beam CT scans showed there was no obvious root resorption.
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No obvious root resorption was found (Fig. 2).
A specially designed labial and palatal arch appliance. Three cantilevers were welded on the labial and palatal arch separately, which was constructed to facilitate the distal movement of the canine and used as anchorage for forced eruption of the impacted teeth in the upper arch.
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After extraction of the retained deciduous teeth, a specially designed labial and palatal arch appliance was made (Fig. 3).
Progress panoramic radiograph eight months after treatment began. The maxillary left canine is far from the occlusal plane with a remarkable inclination. Note the maxillary right central incisor's root overlapped on the root of lateral incisor.
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Then 0.022KH0.028 inch slot straight-wire appliance was bonded to the available teeth and light continuous arch wires were placed for initial leveling (Fig. 4).
Progress intraoral photographs.
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Six months after exposure and ligation, upper left canine was properly positioned (Fig. 5).
Post-treatment facial, intraoral photos and radiographs.
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Occlusal adjustment on the upper right first premolar was performed to prevent traumatic occlusion and achieve acceptable canine protected occlusion (Fig. 6).
Superimposing of pre- and post- cephalometric tracing and analysis.
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ANB=1 ), which indicated normal growth pattern of the maxilla and mandible during orthodontic treatment (Fig. 7). After 10 months retention, this patient still had a stable occlusion (Fig. 8).
Facial and intraoral photographs 10 months after retention.
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ANB=1 ), which indicated normal growth pattern of the maxilla and mandible during orthodontic treatment (Fig. 7). After 10 months retention, this patient still had a stable occlusion (Fig. 8).