1. Department of Endodontics, University of Fortaleza (UNIFOR), Fortaleza, Brazil
2. Department of Organic and Inorganic Chemistry, State University of Ceará (UECE), Fortaleza, CE, Brazil
3. Department of Organic and Inorganic Chemistry, Federal University of Ceará (UFC), Fortaleza, CE, Brazil
4. Department of Endodontics, State University of Campinas (FOP-UNICAMP), Piracicaba, Brazil