Document Type : original article
Authors
1 Associate Professor, Dept of Prosthodontics, School of Dentistry and Dental Research Center of Mashhad University of Medical Sciences, Mashhad, Iran
2 Professor, Dept of Prosthodontics, School of Dentistry and Dental Research Center of Mashhad University of Medical Sciences, Mashhad, Iran
3 Postgraduate Student, Dept of Periodontology, Dental School, Mashhad University of Medical Sciences, Mashhad, Iran
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