1. Department of Endodontics; School of Dentistry; Uberlandia MG Brazil
2. Department of Pathology; Laboratory of Oral and Maxillofacial Pathology; School of Dentistry; Uberlandia MG Brazil
3. Laboratório de Novos Materiais Isolantes e Semicondutores (LNMIS); Institute of Physics; Federal University of Uberlandia; Uberlandia MG Brazil