1 Department of Radiology, Hospital Clínico Universitario de Santiago de Compostela, Santiago de Compostela, Spain; Department of Surgery, University of Oviedo, Oviedo, Spain.
2 School of Dentistry, University of Oviedo, Oviedo, Spain. Electronic address: clinicadentalescobedo@hotmail.es.
3 School of Dentistry, University of Oviedo, Oviedo, Spain.
4 Department of Maxillofacial Surgery, Hospital Universitario Central de Asturias, Oviedo, Spain.