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ePaper created 2016-01-20, 13:53:08 | version 1.38.0
I 51 industry report _ shaping canals I roots1_2015 90 degrees). Instruments still go down to the apex, but with reduced fracture risk because the cyclic fatigue of this motion is interrupted. In this case too, we have performed tests and verifiedthataninstrumentusedlikethis,evenunder extreme conditions, will double its duration before breakingascomparedwitharotatingmotion.Allof the tests have confirmed this advantage both for new and used instruments. With the OTR kit, root canal shaping according to the Hybrid Concept has become even safer and quicker. Is this technique suitable for all kinds of canals? Yes, it is, but it should be adjusted: the more curved and narrower the canal, the greater the need to use intermediateinstruments.Forexample,thewholeset of MGP files may need to be used in preparing the path and the 15.04 and 20.04 EndoWave files used beforereachingthecanalendwithinstrumentswith a06taper.Withalittlepracticeandprudence,wecan safelyshapeevenseverelycurved rootcanalsystems. Finally, we wish to offer a tip: use MGP files to shape the accessory mesiobuccal canal of maxillary molars.The#1MGPfilewillquicklyreachtheapical terminus in cases in which even the smallest stain- less-steelinstrumentwouldhavestoppedafterfew millimetres. After reaching the apical foramen safely,owingtotheintegratedelectronicapexloca- tor, the #15 and 20 MGP files will enlarge the canal, which can easily be refined. In conclusion, we are most satisfied with this easy and predictable technique that transforms any endodontic treatment from a nightmare to a pleasant experience._ Editorial note: A list of references is available from the publisher. The Authors want to thank Dr Daniele Boari, Dr Federico Campedelli,DrElisaCuppini,DrMariannaGrossi,DrFed- ericaPeducci,DrGiorgioSilvestriandDrMarcoVignafor theirhelpinperformingthe"HybridConcepttechnique". Figs. 9a & b_A difficult case: endodontic treatment of a mandibular left second molar (Dr Emanuele Ambu). Fig. 10_A very difficult case. Dr Emanuele Ambu is an active member of the Italian Society of Endodontics,an active member of the ItalianAcademy of Endodontics and a certified member of the European Society of Endodontology. Dr Fabio Rovai is a aggregate member of SIE and a member of ItalianAcademy of Endodontics. Both authors are members of the Italian J Morita Opinion Leaders’ group. _about the authors roots 800 rpm 800 rpm 800 rpm 600 rpm / 0.4 N/cm2 0.4 N/cm2 0.4 N/cm2 3 N/cm2 / 10/02 15/02 20/02 35/08 K-File 10/02 600 rpm 600 rpm 600 rpm 600 rpm 600 rpm 1.5 N/cm2 1.5 N/cm2 1.5 N/cm2 1.5 N/cm2 1.5 N/cm2 15/04 20/04 30/06* 25/06* 20/06 Fig. 9a Fig. 9b 10/0215/0220/0235/08 K-File 10/02 15/0420/0430/06* 25/06* 20/06