1. Dentistry Department, School of Health and Life Sciences, Pontifical Catholic University of Rio Grande do Sul (PUCRS), Av. Ipiranga, P.O. Box 6681, 90619-900, Porto Alegre - RS, Brazil
2. Materials and Nanoscience Laboratory, Pontifical Catholic University of Rio Grande do Sul (PUCRS), P.O. Box 1429, 90619-900, Porto Alegre - RS, Brazil
3. Institute of Cardiology, R. Domingos Crescencio, P.O. Box 132, 90650-090, Porto Alegre - RS, Brazil