1. Department for Conservative Dentistry, Periodontology and Preventive Dentistry (ZPP), RWTH Aachen University, Pauwelsstr. 30, Aachen, Germany
2. Centro de Lasers e Applicações (CLA), Instituto de Pesquisas Energéticas e Nucleares (IPEN/CNEN), Av Prof. Lineu Prestes 2242, São Paulo, Brazil.
3. Restorative Dentistry Department, Dentistry School of University of São Paulo (USP), Av. Prof. Lineu Prestes 2227, São Paulo, Brazil.