@article{Azizi_Hatam_Soltani_Miri_Abiri_2020, title={Comparison of effectiveness of Reciproc, Wave One, Protaper, and One Shape rotary instruments in reduction of bacterial load in root canals}, volume={34}, url={https://www.giornaleitalianoendodonzia.it/gie/article/view/95}, DOI={10.32067/GIE.2020.34.01.10}, abstractNote={<p><strong>Aim: </strong>To compare the effectiveness of Reciproc, Wave One, Protaper, and One Shape rotary instruments in reduction of <em>E. faecalis </em>in root canals.</p> <p><strong>Methodology: </strong>In this in-vitro study, after initial stages of canal enlargement and irrigation, a suspension containing <em>Entrococcus faecalis </em>was inoculated into the root canals of 84 extracted single-canal premolars. The samples (apart from 2 positive and 2 negative controls) were randomly assigned into 4 groups according to rotary instruments used: Reciproc, Wave One, One Shape, Protaper. Each group was then subdivided to 2 groups based on irrigating solutions of normal saline and NaOCl. After instrumentation, the root canals were filled with brain-heart infusion (BHI) broth. Finally bacterial colony forming units (CFU) were counted.</p> <p><strong>Results:</strong> Reduction in number of bacterial colonies before and after instrumentation and irrigation was not significantly different in different rotary instrument systems (P=0.128, F=1.955). However, NaOCl was more effective in reduction of bacterial load compared to normal saline (P<0.001, F=15.528).</p> <p><strong>Conclusions:</strong> All rotary instruments used in the study are effective in reduction of the bacterial load.</p>}, number={1}, journal={Giornale Italiano di Endodonzia}, author={Azizi, Ali and Hatam, Reza and Soltani, Parisa and Miri, Shimasadat and Abiri, Ramin}, year={2020}, month={Jun.} }