Fig. 6. Preoperative radiographs. (A, B) Panoramic and periapical radiographs showed the presence of radiolucency at the periapical region and along the lateral aspect of the root. (C) Gutta-percha cone tracing indicated that the medio-lateral root surface of #13 was associated with the sinus tract. (D-G) Preoperative cone-beam computed tomography demonstrate a loss of hard tissue on the buccal side of the root, accompanied by associated lateral lesions. R, right; L, left; A, anterior; P, posterior.
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