@article{silva_mattos_kato_normando_2012,  title={In vivo color changes of esthetic orthodontic ligatures},  volume={17},  ISSN={2176-9451},  url={https://doi.org/10.1590/S2176-94512012000500011},  DOI={10.1590/S2176-94512012000500011},  number={5},  journal={Dental Press Journal of Orthodontics},  publisher={Dental Press International},  author={Silva, Andréia Viana Martins da and Mattos, Giselle Vasconcelos de and Kato, Carlos Mario and Normando, David},  year={2012},  month={Sep},  pages={76–80} }