Endodontics aims to eliminate bacteria and their by- products from inside the root canal, in order to paralyzethe infection and thus keep dental elements in function that, otherwise, would be lost, not causing damage tothe patient’s oral health. During the stages of the endodontic procedure, the professional is prone to errors, bothdue to failure of the instruments and/or root anatomy of the dental element, as well as the lack of knowledge/skill of the dentist. The present study aims to report the case of a patient who was referred for endodontic retreatmentof element 25, who had a fractured endodontic instrument inside the buccal root canal. After performinga clinical and radiographic examination of the patient, the DS decided to try to remove the fragment via thecanal, with the aid of ultrasonic inserts. After one hour of ultrasonic vibrations with the E18 tip (HELSE) at50% power, the fragment was removed.