@article{closs_branco_rizzatto_raveli_rösing_2007,  title={Gingival margin alterations and the pre-orthodontic treatment amount of keratinized gingiva},  volume={21},  ISSN={1806-8324},  url={https://doi.org/10.1590/S1806-83242007000100010},  DOI={10.1590/S1806-83242007000100010},  number={1},  journal={Brazilian Oral Research},  publisher={Sociedade Brasileira de Pesquisa Odontológica - SBPqO},  author={Closs, Luciane Quadrado and Branco, Paula and Rizzatto, Susana Deon and Raveli, Dirceu Barnabé and Rösing, Cassiano Kuchenbecker},  year={2007},  month={Jan},  pages={58–63} }