1. Division of Cariology and Operative Dentistry, Department of Comprehensive Dentistry, University of Maryland School of Dentistry, Baltimore, Maryland 21201, United States
2. Dental Materials Laboratory, School of Dentistry, Federal University of Rio Grande do Sul, 90035-003 Porto Alegre, Rio Grande do Sul, Brazil
3. Laboratory of Molecular Catalysis, Institute of Chemistry, Federal University of Rio Grande do Sul, Bento Gonçalves Avenue, 9500, Agronomia, 91501-970 Porto Alegre, Rio Grande do Sul, Brazil
4. Department of Restorative Dental Sciences, College of Dentistry, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, 31441 Dammam, Saudi Arabia
5. Dental Biomedical Sciences Ph.D. Program, University of Maryland School of Dentistry, Baltimore, Maryland 21201, United States
6. Department of Dental Materials, School of Dentistry, Federal University of Rio Grande do Sul, Ramiro Barcelos Street, 2492, Rio Branco, 90035-003 Porto Alegre, Rio Grande do Sul, Brazil