1. Center of Diagnosis of Diseases of the Mouth, Federal University of Pelotas, Pelotas, Brazil.
2. Graduate Program in Dentistry, Federal University of Pelotas, Pelotas, Brazil.
3. Department of Oral Pathology and Medicine, School of Dentistry, University of Chile, Santiago, Chile.
4. Department of Restorative Dentistry, School of Dentistry, Federal University of Pelotas, Pelotas, Brazil.
5. Institute for Research in Dental Sciences, School of Dentistry, University of Chile, Santiago, Chile.