evaluation of students' opinion about seminars conducted with problem based learning method in endodontics department of mashhad dental school

background: the purpose of the descriptive study was to investigate students' attitude, who attend their fifth and sixth years of study, about endodontics seminars using problem based learning method at mashhad dental school. methods: it is a descriptive study conducted on fifth and sixth grade students of mashhad dental school in 2012-2013 academic years. data were gathered via questionnaire. four three-hour seminars were held by one of endodontic staff; using problem based learning method (in the form of slide show and question/response). each group contained 7-10 students. after testing the validity and reliability of questionnaires, the anonymous questionnaire was distributed among students at the end of morning and afternoon sessions. the students were supposed to answer and return the questionnaires to endodontic department. the results are presented through descriptive statistics. result: according to the results of the study, satisfaction of fifth and sixth grade students from clinical seminars was higher than average (upper than 50%). based on the conducted assessment, seminars improved students’ awareness about their weaknesses and strengths, professional knowledge, interest and attention. conclusion: based on the result of this study, it appears that seminars and discussions in small groups are useful in order to promote dental education.