1. Department of Oral and Maxillofacial Medicine, School of Dentistry Shiraz University of Medical Sciences Shiraz Iran
2. Department, of Oral and Maxillofacial Surgery, School of Dentistry Tabriz University of Medical Sciences Tabriz Iran
3. Department of Prosthodontics, School of Dentistry Tabriz University of Medical Sciences Tabriz Iran
4. School of Dentistry Tabriz University of Medical Sciences Tabriz Iran
5. School of Dentistry Shiraz University of Medical Sciences Shiraz Iran
6. Department of Oral and Maxillofacial Medicine, School of Dentistry Tabriz University of Medical Sciences Tabriz Iran