1. Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran.
2. Department of Periodontics, Faculty of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran.
3. Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran.