@article{chapper_catão_oppermann_2005,  title={Hand and ultrasonic instrumentation in the treatment of chronic periodontitis after supragingival plaque control},  volume={19},  ISSN={1806-8324},  url={https://doi.org/10.1590/S1806-83242005000100008},  DOI={10.1590/S1806-83242005000100008},  number={1},  journal={Brazilian Oral Research},  publisher={Sociedade Brasileira de Pesquisa Odontológica - SBPqO},  author={Chapper, Ana and Catão, Viviane Vasconcelos and Oppermann, Rui Vicente},  year={2005},  month={Jan},  pages={41–46} }