PMC5616004_01
(a) Preoperative radiograph shows sudden loss in the continuity of the canal and the presence of a groove in the outer part of the root (arrows). (b) Counterpart canine radiograph reveals typical root features. (c) Buccal access cavity due to dental giroversion. (d) Post-treatment radiograph. (e) 12-month follow-up radiograph shows normal periapical tissues.
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Radiographic examination revealed a sudden loss in the continuity of the canal (Figure 1(a)) and the presence of a groove in the outer part of the root, findings that suggest the presence of a mandibular canine with two independent, narrow, and curved canals. Radiographic images of the counterpart canine showed normal characteristics (Figure 1(b)). As the dental giroversion impeded the lingual conventional opening, cameral access was created from the buccal side (Figure 1(c)). The access opening was sealed with temporary cement, and a final radiograph was taken (Figure 1(d)). The 12-month follow-up showed the access cavity restored with a composite-based sealing material, with no pain or tenderness and normal periapical tissues upon clinical and radiographic examinations (Figure 1(e)).