Department of Endodontics, School of Dentistry, Kermanshah University of Medical Sciences, Kermanshah, 6713954658, Iran. Students Research Committee, Kermanshah University of Medical Sciences, Kermanshah, 6715847141, Iran. Department of Oral and Maxillofacial Medicine, School of Dentistry, Kermanshah University of Medical Sciences, Kermanshah, 6713954658, Iran. Department of Orthodontics, School of Dentistry, Kermanshah University of Medical Sciences, Kermanshah, 6713954658, Iran. Medical Biology Research Center, Kermanshah University of Medical Sciences, Kermanshah, 6714415185, Iran. sadeghi_mbrc@yahoo.com. Department of Prosthodontics, School of Dentistry, Kermanshah University of Medical Sciences, Kermanshah, 6713954658, Iran. Advanced Dental Sciences Research Laboratory, School of Dentistry, Kermanshah University of Medical Sciences, Kermanshah, 6713954658, Iran.