1. Department of General Dental Sciences, Marquette University School of Dentistry, Milwaukee 53233, Wisconsin, United States
2. Department of Physics, School of Sciences, São Paulo State University (UNESP), Bauru 17033-360, Brazil
3. Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo (USP), Ribeirão Preto 14040-904, Brazil