2/26/2024 0 Comments Kerr sybron endo k3![]() The introduction of Nickel-Titanium (NiTi) alloy in endodontics presented a significant improvement, allowing good results in terms of cleaning and shaping of root canals, while reducing operative time and minimizing iatrogenic errors.9,10 Some of the most common ones are anatomic factors that may prevent negotiation to the apical termini as well as ledge formation, perforation and file separation. Several challenges often arise during root canal preparation. It has been accepted that even with the use of rotary instrumentation, the nickel-titanium instruments currently available only act on the central body of the root canal, resulting in a reliance on irrigation to clean beyond what may be achieved by these instruments.6 “Shaping canals creates sufficient space to hold an effective reservoir of irrigant that, upon activation, can penetrate, circulate and digest tissue from the uninstrumentable portions of the root canal system”.7,8 Micro-organisms, and micro-toxins from the root-canal system.5 ![]() The challenge for successful endodontic treatment has always been the removal of vital and necrotic remnants of pulp tissue, debris generated during instrumentation, the smear layer, The complexity of root canal anatomy is demonstrated by these cleared samples of maxillary molars. Successful endodontic treatment depends on a number of factors, including proper instrumentation, successful irrigation and decontamination of the root-canal system right to the apical terminus in addition to hard to reach areas such as isthmuses, and lateral and accessory canals3,4 ( Fig. ![]() 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 placement of a definitive, clinically successful restoration and preservation of the tooth.2
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