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ePaper created 2016-09-05, 09:33:59 | version 1.38.0
| technique canal shaping 14 roots 3 2016 Twisted files and adaptive motion technology: A winning combination for safe and predictable root canal shaping Authors: Dr Gary Glassman, Canada; Prof. Gianluca Gambarini, Italy & Dr Sergio Rosler, Argentine The ultimate goal of endodontic treatment is the prevention and/or treatment of apical periodontitis, such that there is complete healing and absence of infection1 while the overall long-term goal is the placementofadefinitive,clinicallysuccessfulresto- ration and preservation of the tooth.2 Successful endodontic treatment depends on a numberoffactors,includingproperinstrumentation, successful irrigation and decontamination of the root-canal system right to the apical terminus in ad- dition to hard to reach areas such as isthmuses, and lateral and accessory canals3, 4 (Fig. 1a & 1b). Thechallengeforsuccessfulendodontictreatment has always been the removal of vital and necrotic remnantsofpulptissue,debrisgeneratedduringin- strumentation, the smear layer, micro-organisms, and micro-toxins from the root-canal system.5 Ithasbeenacceptedthatevenwiththeuseofrotary instrumentation, the nickel-titanium instruments currently available only act on the central body of the rootcanal,resultinginarelianceonirrigationtoclean beyond what may be achieved by these instruments.6 ‘Shapingcanalscreatessufficientspacetoholdanef- fective reservoir of irrigant that, upon activation, can penetrate, circulate and digest tissue from the unin- strumentable portions of the root canal system’.7, 8 Several challenges often arise during root canal preparation. Some of the most common ones are an- Figs.1a & b:The complexity of root canal anatomy is demonstrated by these cleared samples of maxillary molars. Fig.1a Fig.1b 32016