1. Department of Dental Materials, School of Dentistry, Universidad de la República, Montevideo, Uruguay.
2. Laboratory of Dental Materials, Academic Area of Dentistry, Autonomous University of Hidalgo State, Pachuca, México.
3. Graduate Program in Dentistry, Federal University of Pelotas, Pelotas, Brazil.
4. Department of General and Oral Physiology, School of Dentistry, Universidad de la República, Montevideo, Uruguay.