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ePaper created 2018-03-06, 08:52:14 | version 1.38.0
Fig. 3a Fig. 1 Fig. 2 Fig. 3b Fig. 4 Fig. 5 Fig. 6 Fig. 1: Schilder triangle, mineralisation of the root canal entrance. Fig. 2: Creating the access cavity and radiograph with scouting file in place (MB1 and MB2). The mineralisation of the root canal entrance limited the initial catheterisation. Figs. 3a & b: One Flare: MEB profile and tip view (Dr Franck Diemer). Fig. 4: One Flare eliminates the Schilder triangle and the initial millimetres of the pulp parenchyma in order to permit root canal shaping without any coronal interferences to the instrument after the apical limit has been established. Fig. 5: One Flare ensures the removal of the first millimetres of pulp parenchyma and removes the interferences to files, which are recentred in the canal in order to facilitate access and the shaping to the apical preparation limit. Fig. 6: The judicious enlarge- ment of the root canal entrances using the One Flare instrument allows endodontic shaping and cleaning in total safety while preserving the root canal anatomy. cleaned. The canal is irrigated once again and negotiated using the steel file used for the initial root canal explora- tion. Once the instrument has penetrated to a depth of 4 mm (± 1 mm), it can be used with pressure on the walls to selectively collect samples, remove the initial dental ir- regularities and reduce the initial restrictions to the following shaping instrument (Fig. 4). This penetration (maximum of 5 mm) theoretically allows it to create a root canal en- trance of 0.61 mm (maximum of 0.70 mm), which is less than or equal to the diameter of a No. 2 Gates–Glidden drill (0.70 mm). Conclusion This new flaring instrument offers a new minimally in- vasive approach to endodontic treatment by selectively eliminating dentine formations at the corono-radicular junction. It meets multiple requirements of endodontic preparation, such as removing initial interferences to root canal preparation instruments, preliminary removal of the first millimetres of a dense pulp, fibro-calcic or even ne- crotic parenchyma and re-centring of root canal shaping instruments (Fig. 5), as well as ensuring the precision of the apical limit of endodontic preparation4, 5 and 3-D cleaning or filling of the root canal (Fig. 6). Editorial note: A list of references is available from the publisher. about Dr Franck Diemer is a practitioner at the Centre Hospitalier Universitaire in Toulouse in France. Dr Jean-Philippe Mallet is a lecturer at the Faculty of Dentistry of the Université Toulouse III—Paul Sabatier in France. Haifa Ben-Rejeb works at the University of Monastir’s Faculty of Dental Medicine in Tunisia. Dr Walid Nehme is a lecturer at the Université Saint-Joseph’s Department of Endodontics in Beirut in Lebanon. roots 1 2018 19