sh. abdollahzadeh assistant professor, department of oral medicine, school of dentistry, hamadan university of medical ry. mashouf professor, department of microbiology, school of medicine, hamadan university of medical sciences, h h. mortazavi assistant professor, department of oral medicine, school of dentistry, hamadan university of medical mh. moghaddam associate professor, traditional medicine and materia medica research center, shahid beheshti univer n. roozbahani dentist, private practice m. vahedi assistant professor, department of oral medicine, school of dentistry, hamadan university of medical