@article{pithon_2012,  title={Cytotoxicity of orthodontic materials: the search for the perfect orthodontic material},  volume={17},  ISSN={2176-9451},  url={https://doi.org/10.1590/S2176-94512012000400002},  DOI={10.1590/S2176-94512012000400002},  number={4},  journal={Dental Press Journal of Orthodontics},  publisher={Dental Press International},  author={Pithon, Matheus Melo},  year={2012},  month={Jul},  pages={2–3} }