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Dental Tribune United Kingdom Edition No.3, 2017

Dental Tribune United Kingdom Edition | 3/2017 TRENDS & APPLICATIONS 15 NiTi wire with a diameter of 1 mm. The active section therefore varies from 0.25 to 1 mm, from the tip to the shaft, while the interval and an- gle of the helix increase. It also un- dergoes electropolishing treatment to remove machining burrs and give it a smooth surface and straight cutting edges without any snags, as well as thermal treatment to in- crease its fl exibility and resistance to fracture (Figs. 3a & b). This treat- ment proves particularly signifi - cant when enlarging the entrance 3a 3b 4 5 6 to a second mesiobuccal canal in the maxillary molar, for example. The great fl exibility also makes it possible to enter extremely curved canals or ones with extreme changes of direction, all without any risk of fracturing the tip or of creating blockages or stops. The ge- ometry of and treatments used in the production of One Flare allow it to be used with a motor, with or without torque control, and contin- uous rotation of between 250 and 400 rpm, without pressure or with very low apical pressure. After the initial scouting and se- curing using a hand fi le with a tip diameter of 0.1 mm or a continu- ous-rotation NiTi instrument such as One G (MICRO-MEGA), One Flare prepares the area of the cor- ono-radicular junction. The instru- ment uses a conventional wave movement in three successive phases, from the crown to the tip, centred in the canal and allowing it to progress by a few millimetres. Af- ter treatment, the fi le is withdrawn from the canal and cleaned. The ca- nal is irrigated once again and nego- tiated using the steel fi le used for the initial root canal exploration. Once the instrument has pene- trated 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 irregulari- ties and reduce the initial restric- tions to the following shaping in- strument (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 fl aring instrument of- fers a new minimally invasive ap- proach to endodontic treatment by selectively eliminating dentine for- mations at the corono-radicular junction. It meets multiple require- ments of endodontic preparation, such as removing initial interfer- ences to root canal preparation in- struments, preliminary removal of the fi rst millimetres of a dense pulp, fi bro-calcic or even necrotic 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 fi lling of the root canal (Fig. 6). Editorial note: A list of references is available from the publisher. Dr Franck Diemer is a practitioner at the Centre Hos- pitalier Universitaire in Toulouse in France. Dr Jean-Philippe Mallet is a lecturer at the Faculty of Dentist- ry 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-Jo- seph’s Department of Endodontics in Beirut in Lebanon. AD The Dental Tribune International Magazines www.dental-tribune.com I would like to subscribe to CAD/CAM Clinical Masters* cosmetic dentistry* implants laser ortho** prevention* roots Journal of Oral Science & Rehabilitation*** EUR 44 per year (4 issues per year; incl. shipping and VAT for customers in Germany) and EUR 46 per year (4 issues per year; incl. shipping for customers outside Germany). * EUR 12 per year (1 issue per year; incl. shipping and VAT for customers in Germany) and EUR 14 per year (1 issue per year; incl. shipping for customers outside Germany). ** EUR 22 per year (2 issues per year; incl. shipping and VAT for customers in Germany) and EUR 23 per year (2 issues per year; incl. shipping for customers outside Germany). *** EUR 200 per year (4 issues per year; incl. shipping and VAT). 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Shipping Address Name Address Zip Code, City E-mail Date, Signature Country Figs. 3a & b: One Flare: MEB profi le and tip view (Dr Franck Diemer). — Fig. 4: One Flare eliminates the Schilder triangle and the initial millimetres of the pulp paren- chyma 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 en- sures the removal of the fi rst millimetres of pulp parenchyma and removes the interferences to fi les, 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 endodon- tic shaping and cleaning in total safety while preserving the root canal anatomy. PayPal Credit Card Credit Card Number Expiration Date Security Code SUBSCRIBE NOW! F +49 341 48474 173 subscriptions@dental-tribune.com

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