@article{busquim_santos_2002,  title={Cervical shaping in curved root canals: comparison of the efficiency of two endodontic instruments},  volume={16},  ISSN={1517-7491},  url={https://doi.org/10.1590/S1517-74912002000400008},  DOI={10.1590/S1517-74912002000400008},  number={4},  journal={Pesquisa Odontológica Brasileira},  publisher={Sociedade Brasileira de Pesquisa Odontológica e Faculdade de Odontologia da Universidade de São Paulo},  author={Busquim, Sandra Soares Kühne and Santos, Marcelo dos},  year={2002},  month={Dec},  pages={327–331} }