1. Department of Radiology, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran
2. Department of Restorative Dentistry, School of Dentistry, Shahed University of Medical Sciences, Tehran, Iran
3. Dental Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
4. Department of Periodontics, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran