@article{alhaija_al-saif_taani_2018,  title={Periodontal health knowledge and awareness among subjects with fixed orthodontic appliance},  volume={23},  ISSN={2176-9451},  url={https://doi.org/10.1590/2177-6709.23.5.40.e1-9.onl},  DOI={10.1590/2177-6709.23.5.40.e1-9.onl},  number={5},  journal={Dental Press Journal of Orthodontics},  publisher={Dental Press International},  author={Alhaija, Elham S. Abu and Al-Saif, Eman M. and Taani, Dafi Q.},  year={2018},  month={Sep},  pages={40.e1–40.e9} }