De-Obturation Files. The D-Race set consists of two NiTi files – DR1 and DR2. The first instrument, DR1, has an active tip for handling the root-filling material and is used in the first millimetres of the coronal and straight part of the canal. instruments: DR1 30/.10, DR2 25/.04. Lengths: DR1 15 mm, DR2 25 mm. Speed: DR1 1000 rpm, DR2 600 rpm. Torque: 1.5 Ncm. DR2: single use. HOW TO USE:- 3.Find entrance of canal and access the obturation material 4. Prepare, if needed, a cavity 1-2 mm with DR1 and drop solvent to soften obturation material. If necessary, use a heat plugger or ultrasonics. 5. Gently engage DR1 rotating at 1000 rpm (recom. torque 1.5 Ncm) into the obturation material. The active tip of DR1 facilitates the initial penetration. 6. Insert DR2 rotating at 600 rpm (1 Ncm) 7. Don’t force the way, clean and check the blade regularly 8. Continue to advance apically as long as filling material is visible on the flute 9. If needed, drop solvent to help removal of obturation material 9. Establish final WL and finalise shaping with standard NiTi Race files.
Speed: DR1 1000 rpm, DR2 600 rpm. Torque: 1.5 Ncm. D-Race will desobturate most canals, whatever the filling used – gutta-percha, carriers, paste, resin-based materials. D-Race removes a large part of the ancient filling material. With only 2 instruments time is saved and safety of treatment is increased. Once desobturated, the canal will be retreated.