1. Department of Oral and Maxillofacial Surgery, State University of Campinas, São Paulo, Brazil.
2. Department of Oral Rehabilitation and Periodontics, State University of Campinas, São Paulo, Brazil.
3. Department of Oral and Maxillofacial Surgery, Universidad de La Frontera, Temuco, Chile.
4. Center for Biomedical Research, Universidad Autónoma de Chile, Temuco, Chile.