1 Oral Surgery and Implantology Unit, Division of Oral & Maxilllofacial Surgery, Geneva University Hospital, Faculty of Medicine, Geneva, Switzerland alexandre.perez@hcuge.ch.
2 Division of Radiology, Diagnostic Department, Geneva University Hospital, Faculty of Medicine, Geneva, Switzerland.
3 Oral Surgery and Implantology Unit, Division of Oral & Maxilllofacial Surgery, Geneva University Hospital, Faculty of Medicine, Geneva, Switzerland.