sh. mohajerani associate professor, oral and maxillofacial surgery department, faculty of dentistry, shaheid beheshti university of medical sciences, iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی شهید بهشتی (shahid beheshti university of medical sciences) a. miraee baghnoee dentist z. ghorbani dentist l. gholami post - graduate student of periodontics, faculty of d entistry, ham a dan university of m edical s ciencesسازمان اصلی تایید شده: دانشگاه علوم پزشکی همدان (hamadan university of medical sciences) s. tavakolizadeh post-graduate student of prostodontics, faculty of dentistry, hamadan university of medical sciences, iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی همدان (hamadan university of medical sciences) z. ebrahimzadeh post - graduate student of periodontics, faculty of d entistry, ham a dan university of m edical s ciencesسازمان اصلی تایید شده: دانشگاه علوم پزشکی همدان (hamadan university of medical sciences)