Instrument fractures within the root canal during root canal treatment are an unwanted and frustrating complication for both the clinician and the patient. Cleaning and shaping procedures within the root canal system may be complicated by intracanal separation of endodontic instruments, thereby affecting treatment outcomes. Fracture is most common in the apical portion of a root canal and seems to be caused by improper or overuse of an endodontic instrument. The instrumentation technique, use of a torque-controlled motor, the dimension and surface condition of the instrument, rotation rate, radius (and, to a degree, angle) of canal curvature, and the presence of a straight-line access are all factors that affect the incidence and mode of failures. This case report explains the various aspects (including contributing factors, prognosis and management) of instrument fracture

Fractured Instrument, Bypassing, Complications, Retrieval of files