1. Department of Endodontics, School of Dentistry, Federal University of Uberlândia, Uberlândia, MG, Brazil.
2. School of Dentistry, Federal University of Uberlândia, Uberlândia, MG, Brazil.
3. Department of Oral Diagnosis, School of Dentistry, Federal University of Uberlândia, Uberlândia, MG, Brazil.
4. Functional and New Nanostructured Materials Laboratory, Physics Institute, Federal University of Alagoas, Maceió, AL, Brazil.