Turning a Non-Visible Separated File into a Visible One: A Conservative Retrieval Approach

When approaching separated file cases, two critical factors determine success: case selection and treatment sequence. The aim is not only to remove the fragment but also to preserve the long-term restorability of the tooth by minimizing dentin sacrifice. In this case, a maxillary molar was referred with two separated files: • ML canal: A short fragment in a narrow canal with blockage beyond it. • MB canal: A long fragment located beyond the curvature and completely non-visible under the microscope. The first step was to assess restorability. All old restorations and caries were removed to reach sound tooth structure. The ferrule effect was evaluated, and the need for crown lengthening was considered before starting endodontic work. A pre-endo build-up was…