1. Prosthodontic Department, Dental Faculty, Mazandaran University of Medical Sciences, Sari, Iran
2. Restorative Dentistry Department, Dental Faculty, Babol University of Medical Sciences, Babol, Iran
3. Orthodontic Department, Dental Faculty, Mazandaran University of Medical Sciences, Sari, Iran
4. Department of Periodontics, Faculty of Dentistry, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
5. Dental Implant Research Center, Dental Research Institute, Tehran University of Medical Sciences, Tehran, Iran
6. Department of Surgical Sciences and Integrated Diagnostics, University of Genoa, Italy
7. Dental Sciences Research Center, Mazandaran University of Medical Sciences, Sari, Iran