1. Division of Oral Radiology, Department of Oral Diagnosis, School of Dentistry Caxias do Sul University Caxias do Sul RS Brazil
2. Division of Oral Radiology, Department of Oral Diagnosis, Piracicaba Dental School University of Campinas Piracicaba SP Brazil
3. Division of Oral Pathology, Department of Conservative Dentistry Federal University of Rio Grande do Sul Porto Alegre RS Brazil
4. Division of Oral Radiology, Department of Surgery and Orthopedics Federal University of Rio Grande do Sul Porto Alegre RS Brazil
5. Department of Oral and Maxillofacial Radiology Academic Centre for Dentistry Amsterdam (ACTA) Amsterdam The Netherlands