1. Department of Endodontics, Cayetano Heredia Peruvian University (UPCH), Lima, Peru.
2. Department of Restorative Dentistry, Araraquara School of Dentistry, São Paulo State University (UNESP), Araraquara, SP, Brazil.
3. Academic Department of Stomatological Clinic, Cayetano Heredia Peruvian University (UPCH), Lima, Peru.