Case report with a new Ni-Ti single file for the preparation of the root canal space

Aim of this case series was to clinically evaluate the shaping ability and the clinical handling of a new Ni-Ti instrument (Reciproc, Dentsply, Italy). This systematic requires the use of only one instrument for shaping the entire root canal (R25, R40 or R50), and this instrument, being disposable, can only be used for a single patient,. Methods.100 teeth from 82 patients needing endodontic treatment were selected for this study. All teeth were shaped with Reciproc files. In 84 cases R25 was used, in 11 cases R40 was used, in 5 cases R50 was used. The decision was based on the x-ray and clinical analysis of the dimension of the root canal before starting the endodontic procedure. If the whole canal, or part of it, was not visible, R25 was selected. If the canal was visible on the x-ray 3 different scenarios were possible. If a k-file #30 passively reached the working length (WL), R50 was selected. If the k-file #30 couldn’t reach the WL, but a k-file #20 could, R40 was selected. If the k-file #20 couldn’t reach the WL, R25 was selected. All cases were irrigated with 5% NaOCl and EDTA, and obturated using the “continuous wave” technique. Results. No file separated during the case report, and in all cases a good shaping of the root canal was achieved; all cases had control X-ray after 3 months, showing signs of healing. Conclusions. Reciproc file seem to be able to shape the root canal correctly, reducing the number of files used for a single patient. 76