PMC6745101_01
Clinical images of the bilocular lesion in the mandible. (a) Orthopantomography. The well-defined bilocular lesion is observed in the left mandible expanding from the distal of the canine tooth to the bottom of the 2nd premolar. (b) CT findings. The size of the bilocular lesion was 18 mm x 15 mm. The root of the 2nd premolar showed knife-edge resorption.
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Knife-edge root resorption was observed in the 2nd premolar (Figures 1(a) and 1(b)).
Intraoperative and pathological findings of the bilocular lesion in the mandible. (a) Bicameral bone resorption after resection of the bilocular lesion. After total resection of the bilocular lesion and extraction of the 1st premolar, bicameral alveolar bone resorption was observed. (b) The resected bilocular lesion. The left half is the proximal part of the lesion and the right side is the distal part. The proximal part is in bright red and the distal part is in dark red. (c) Pathological findings of the proximal part of the lesion. The components of hard tissue in the proximal part of the lesion represented lamellar structures of cementum (arrowheads). (d) Pathological findings of the distal part of the lesion, which showed severe inflammation without tooth structure components inside.
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We performed a total resection of the bilocular lesion with extraction of the 1st premolar under general anesthesia (Figures 2(a) and 2(b)). Epithelial shedding as an effect of the inflammation was also observed (Figures 2(c) and 2(d)). Interestingly, tooth structure components with lamellar structures of cementum were found irregularly at the inner surface of the proximal part of the lesion (Figure 2(c)). The distal part showed severe inflammation without tooth structure components (Figure 2(d)).