1. Department of Prosthodontics, Faculty of Dentistry, Islamic Azad University of Medical Science, Tehran, Iran
2. Department of Operative Dentistry, Islamic Azad University of Medical Science, Tehran, Iran
3. Department of Prosthodontics, Shahid Beheshti University of Medical Sciences, Tehran, Iran
4. Department of Oral and Maxillofacial Surgery, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran
5. Department of Prosthodontics, Faculty of Dentistry, Shahed University, Tehran, Iran
6. Department of Restorative Dentistry, School of Dentistry, Ardabil University of Medical Sciences, Ardabil, Iran
7. Student Research Committee, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
8. Dentistry Research Institute, School of Dentistry, Shahed University, Tehran, Iran