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(a–c) No obvious fracture lines can be seen in the cervical, middle, and apical thirds of the mesial root of tooth 36 on axial images. (d) Coronal reconstruction image showing vertical alveolar bone resorption on the buccal side. (e) Periodontal examination reveals deep periodontal pockets on the buccal side-of the mesial root measuring approximately 11 mm. (f) Periodontal exploration reveals a longitudinal fracture line on the buccal side-of the mesial root.
