1. Department of Oral Medicine, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
2. Department of Oral and Maxillofacial Radiology, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
3. Department of Orthodontic, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
4. School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran.