ABSTRACT
Dental students are exposed to clinical environmental stresses in addition to educational environmental stresses. If psychological stressors become chronic and/or remain untreated, they result in psychological and physical symptoms. There are few studies about stress and dental students in our country. The aim of this study was to assess stress level and related factors sorted according to the academic year and gender, among dental students of Mashhad University of Medical Sciences during 2008-2009.This study was a description-analytical and cross-sectional study. In this research two questionnaires were used concurrently and the information obtained was analyzed by the SPSS software. 52% of students showed abnormal levels of stress. Students of fourth academic year showed the highest level of stress. Stress levels in two genders were not significantly different. It was also characterized that university stressors played a more significant role in stress level than non-university stressors. Based on the results of this study, and the findings of, high levels of stress among dental students as well as the harmfulness of high levels of stress, greater attentions must be given to this issue by the uthorities. Furthermore, the forth year students who have recently entered the clinic, are in the greatest need of help
ABSTRACT
Psychologists have observed that during the student career what have the most effect on academic performance status are the general study skills. One important reason that some students do not achieve desired results from their efforts is lack of study skills. It is useful for education managers to have information about student's capabilities. The purpose of this research was to evaluate study skills among students of Mash had Dental School in the academic year of 2008-2009. One hundred and ninety students from Mashhad Dental School participated in this cross sectional descriptive study. A questionnaire which proved to be valid and reliable was used for data collection. Data were analyzed with SPSS software and described with descriptive statistics. Our research findings showed that students do not have enough knowledge of study skills. The greatest shortcomings were in the fields of reminding and remembering the subjects, concentration and time management. Study resources of most students for final examination were fascicles and during the semester were textbooks. The students also do not insist on review of learned contents. 58% of students had efficient methods, but 38% did not have a good efficient method. The students' resources and techniques of studying lack the desired quality. This should be considered by education department officials. It is essential to schedule training programs for students to enhance their study skills. Teaching these skills and improving study habits by carrying out relevant workshops for first-year students can help to improve their learning
ABSTRACT
The aim of this study was to evaluate the effects of remnant root canal medicament, calcium hydroxide on the short and long term sealing ability of mineral trioxide aggregate [MTA] apical barrier. Fifty single-rooted teeth were prepared and apical resorptions were made using sulfuric acid. The teeth were allocated into two experimental groups and two control groups. In group 1, calcium hydroxide was placed into canals for one week. In group 2, no medication was placed. In both groups, a 4-mm MTA plug was placed in the root canals. The remaining portion of the canal was filled with gutta-percha/sealer. The microleakage was evaluated after 7 days and 3 months using fluid filtration technique. Repeated measurement ANOVA was used for statistical analysis. There was no significant difference in sealing ability between the two groups in either time periods. In both groups, microleakage decreased after three months but this decrease was not statistically significant. Medication with calcium hydroxide had no adverse effect on the short and long-term sealing properties of MTA plug