Six Endodontic Extremes: Step-by-Step Analysis of Clinical Cases from A to Z

— CBCT as a diagnostic tool for complex endodontic pathology

— Linking imaging findings with clinical and morphological complexity

— When and how to use CBCT for challenging endodontic cases

— Complex C-shaped root canal system: 3D printing, endodontic treatment, and CBCT follow-up

— Dens invaginatus: 3D-printed extraoral simulation, endodontic treatment, and CBCT follow-up

— Revascularisation: CBCT and histological confirmation

— Gemination: CBCT-guided separation and pulse oximetry follow-up

— Calcified extraradicular deposit: multimodal assessment using CBCT and echographic imaging with histological confirmation

— Expanding odontogenic cysts: differential diagnosis with keratocystic odontogenic tumor, CBCT-based treatment, histopathology, and follow-up.