Retrieval of overextending separated endodontic instrument: A review of methods and case report

Abstract

Instrument separation during root canal treatment is one of the most unpleasant mishaps. Several techniques have been described to retrieve the separated instruments; however, they generally require specific tools that are not always available at dental clinics. This case report aims at presenting a simple alternative technique for the removal of root canal instruments separated during endodontic treatment. Endodontic retreatment was indicated for a maxillary lateral incisor of a 19-year-old patient. The radiographic examinations revealed the presence of a separated (fractured) instrument beyond the apical part of the canal. Retreatment was initiated by removing the obturated materials. After several unsuccessful attempts to retrieve the broken fragment, a hypodermic needle with chemically self-cure acrylic resin was used under an endodontic microscope to remove the separated fragment successfully. The retrieval technique used in this case was safe, simple, and low cost.

Keywords

• broken file
• endodontic microscope
• root canal preparation
• separated instrument