@article{ferreira_brandão_martinelli_pignaton_2016,  title={Improving gingival smile by means of guided bone regeneration principles},  volume={21},  ISSN={2176-9451},  url={https://doi.org/10.1590/2177-6709.21.3.116-125.sar},  DOI={10.1590/2177-6709.21.3.116-125.sar},  number={3},  journal={Dental Press Journal of Orthodontics},  publisher={Dental Press International},  author={Ferreira, Carlos Eduardo de Almeida and Brandão, Roberto Carlos Bodart and Martinelli, Carolina Borges and Pignaton, Túlio Bonna},  year={2016},  month={Mar},  pages={116–125} }