Document Type : original article
Authors
1 Professor, Dept of Orthodontics, School of Dentistry and Dental Research Center of Mashhad University of Medical Sciences, Mashhad, Iran
2 Assistant Professor, Dept of Orthodontics, School of Dentistry and Dental Research Center of Mashhad University of Medical Sciences, Mashhad, Iran
3 Assistant Professor, Dept of Orthodontics, Dental School, Shiraz University of Medical Sciences, Shiraz, Iran