@article{rosa_bier_pereira_só_wolle_2011,  title={Simulation of soft and hard tissues and its effects on radiopacity of root canal sealers},  volume={26},  ISSN={1980-6523},  url={https://doi.org/10.1590/S1980-65232011000400009},  DOI={10.1590/S1980-65232011000400009},  number={4},  journal={Revista Odonto Ciência},  publisher={Pontifícia Universidade Católica do Rio Grande do Sul},  author={Rosa, Ricardo Abreu da and Bier, Carlos Alexandre Souza and Pereira, Charles Cunha and Só, Marcus Vinícus Reis and Wolle, Carlos Frederico Brilhante},  year={2011},  pages={326–330} }