Fig. 3

Cases illustrating each healing category. (A, D, and G) Sagittal-sectional preoperative CBCT, (B, E, and H) sagittal-sectional postoperative CBCT, and (C, F, and I) 3D reconstruction images obtained at the 6-month recall. The red models represent preoperative lesions, while the green models depict postoperative lesions. (A–C) Treatment was considered a “failure” because the lesion volume did not decrease. (D–F) The lesion was reduced in size at the 6-month recall, so this case was considered a ‘‘success”. (G–I) The maximum diameter of this large periapical lesion was 11 mm. The lesion was undetected at the 6-month recall, so this case was also considered a ‘‘success”