IJCRRI Journ Cur Res ReInternational Journal of Current Research and ReviewI Journ Cur Res Re2231-21960975-5241Open Science Publishers LLP148HealthcareSURVIVAL OF WAVEONE AND ONE SHAPE FILES USED IN SEVERELY CURVED CANALS OF EXTRACTED TEETH KarovaEmiliaTopalova-PirinskaSnezhanka150520151217This article is copyright of Popeye Publishing, 20092009This is an open-access article distributed under the terms of the Creative Commons Attribution (CC BY 4.0) Licence. You may share and adapt the material, but must give appropriate credit to the source, provide a link to the licence, and indicate if changes were made.

Objective: The aim of our investigation was to study and compare the survival of WaveOne and One Shape file systems used for shaping of severely curved canals of extracted teeth, after a glide path creation. Material and methods: One hundred canals of extracted teeth were divided in two equal groups, depending on the used shaping file. Average lifespan and cumulative survival at the time, after a glide path creation, were tested. All shaping instruments worked till fracture occurred. Results: Average lifespan of one WaveOne file was 13.33__ampersandsignplusmn;3.79 canals and of a single One Shape file __ampersandsignndash; 8.40__ampersandsignplusmn;1.34 canals. A tendency of a longer survival of WaveOne files was revealed when compared with the One Shape files. Conclusions: The WaveOne files manifested longer survival than One Shape files. The reciprocating rotation optimizes the endodontic instrumentation of severely curved canals and makes the instruments more resistant to fracture.

Continuous rotation Fracture Lifespan Nickel-titanium instruments Reciprocating rotation