Fidalgo, T. K. da S., Pithon, M. M., Maciel, J. V. B., & Bolognese, A. M. (2011). Friction between different wire bracket combinations in artificial saliva: an in vitro evaluation . Journal of Applied Oral Science, 19(1), 57-62. https://doi.org/10.1590/S1678-77572011000100012