Activated irrigation by Gentlefile during root canal therapy

Introduction
The development of modern dentistry has changed the nature of endodontic therapy. Formerly arduous and strenuous root canal treatment has become a sequence of precise procedures, usually with no, or negligible, side-effects. The introduction of rotary nickel-titanium (NiTi) files onto the market has considerably shortened the time of canal preparation. Unchangeably, the mechanical preparation is aimed at shaping the canal, having preserved its original curvature, removing the infected tissue from the root canal system, and allowing dense and homogeneous obturation of the canal. Regardless of the cross-section of traditional rotary files, it has been confirmed that contact zones of rotary NiTi instruments never negotiate the canal walls in their entirety. The remaining wall surface of the canal is intact and therefore remains untreated. To improve the root canal disinfection, the preparation stage should include a chemical phase with the use of rinsing agents. Current published research findings indicate that activation of the irrigation solutions improves their cleansing properties. As a consequence, many researchers constantly develop the new methods and aim for new equipment to allow efficient irrigation of the root canal system.

Case description
The article presents four clinical cases managed with the use of a new instrument called the Gentlefile (MedicNRG, Israel), which serves not only for mechanical preparation but also for the activation of rinsing agents during endodontic treatment.

Conclusions
After completing the mechanical preparation of the root canals, the application of the appropriate protocol of rinsing seems to be an elementary stage for successful endodontic treatment. Activation of rinsing agents with the Gentlefile, by improving the effectiveness of cleaning, enables an impermeable, fluid tight seal within the entire root canal, increasing the success rate in endodontic treatment.