1. Department of Oral- and Maxillofacial Surgery; Ludwig-Maximilians-University; Munich Germany
2. Department of Oral Basic & Clinical Sciences; King Abdulaziz University; Jeddah Saudi Arabia
3. Department of Oral and Maxillofacial Radiology, Clinic for Oral and Craniomaxillofacial Surgery; Ludwig-Maximilians-University; Munich Germany