1. Department of Endodontics; School of Dentistry; Grande Rio University (UNIGRANRIO); Duque de Caxias Rio de Janeiro Brazil
2. Department of Endodontics; Fluminense Federal University (UFF); Niterói Rio de Janeiro Brazil
3. Department of Dentistry II; Federal University of Maranhão; São Luis Maranhão Brazil
4. Nuclear Engineering Program; Federal University of Rio de Janeiro (UFRJ); Rio de Janeiro Rio de Janeiro Brazil