@article{grazziotin-soares_barato filho_vanni_almeida_oliveira_barletta_limongi_2011,  title={Flexibility of K3 and ProTaper universal instruments},  volume={22},  ISSN={0103-6440},  url={https://doi.org/10.1590/S0103-64402011000300007},  DOI={10.1590/S0103-64402011000300007},  number={3},  journal={Brazilian Dental Journal},  publisher={Fundação Odontológica de Ribeirão Preto},  author={Grazziotin-Soares, Renata and Barato Filho, Flares and Vanni, José Roberto and Almeida, Susimara and Oliveira, Elias Pandonor Motcy de and Barletta, Fernando Branco and Limongi, Orlando},  year={2011},  pages={218–222} }