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Background. Chemomechanical preparation of the root canal system is a key factor in endodontic therapy. It is also important to maintain the integrity and localization of anatomical structures in the apical region of the canal and avoid excessive weakening of the root as a result of errors which occur during preparation. One of the challenges in endodontic treatment is the preparation of canals with high degree of curvature. Nowadays, many nickel-titanium instruments have been introduced, thereby increasing the efficiency and safety of root canal preparation, as compared to stainless steel hand files. Badanie zostało sfinansowane z funduszu statutowego: Zakład Endodoncji UMED 503/2-044-02/503-01. Dent. Med. Probl. 2016, 53, 2, 222–229 DOI: 10.17219/dmp/61326 © Copyright by Wroclaw Medical University and Polish Dental Society

Comparison of Three Different Nickel-Titanium Endodontic Systems in Shaping Simulated L-Shaped Canals