This case report details the successful endodontic retreat of a mandibular right second molar (LR7) in a 28-year-old male patient. The patient was initially diagnosed with symptomatic irreversible pulpitis and referred to a specialist after two separate endodontic files fractured sequentially within the distal root canal. Radiographic evaluation revealed a prominent pulp stone attached to the distal canal lumen, which had blocked the true pathway, exerted excessive stress on the initial clinician’s instruments, and ultimately led to a false path and instrument separation. Additionally, an abrupt lateral curvature near the apical exit of the distal canal further complicated the anatomy and contributed to the double fracture.
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