1. 1 Department of Endodontics, School of Dentistry , Kermanshah University of Medical Sciences , Kermanshah , Iran
2. 2 Students Research Committee , Kermanshah University of Medical Sciences , Kermanshah , Iran
3. 3 Cardiovascular Research Center , Kermanshah University of Medical Sciences , Kermanshah , Iran
4. 4 Department of Oral and Maxillofacial Medicine, School of Dentistry , Kermanshah University of Medical Sciences , Kermanshah , Iran
5. 5 Department of Orthodontics, School of Dentistry , Kermanshah University of Medical Sciences , Kermanshah , Iran
6. 6 Department of Prosthodontics, School of Dentistry , Kermanshah University of Medical Sciences , Kermanshah , Iran
7. 7 Advanced Dental Sciences Research Center, School of Dentistry , Kermanshah University of Medical Sciences , Kermanshah , Iran