PMC3919958_01
Panoramic radiograph demonstrates the transmigrating canine below the apices of mandibular incisors. However, precise evaluation is not possible due to superimposition of ghost shadow of cervical spine in the midline.
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The transmigrated canine was positioned buccally to the lower anterior teeth and below their apices, its long axis formed a 24-degree angle with the basic mandibular plane (Figure 1).
Coronal (tangential) view of the canine in CBCT.
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The transmigrated canine crown caused a significant decrease in the width of the external mandible cortical bone, while the apex caused a slight decrease in the width of the external mandible cortical bone (Figure 2).
Cone-Beam CT allows precise evaluation of the location of the transmigrating canine and its relationship to apices of incisors.
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Furthermore in the CBCT examination root resorption of the lower incisors, possibly due to the presence of transmigrated canine, was excluded (Figure 3).
PMC3919958_02
Panoramic radiograph taken after orthodontic treatment reveals progress of transmigration of the canine.
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In the panoramic radiograph after 11 months from delivering a fixed appliance in the lower arch a horizontal movement of the transpositioned canine was observed (Figure 4).