The aim of this study was to determine the prevalence and probable predisposing factors of Aphthous ulcer among the medical students. This project was a cross-sectional and descriptive study, which was carried out on 485 students of Golestan University of medical sciences in the north of Iran. Data was collected by filling the questionnaire. The gathered informations entered into SPSS software and were analyzed by Chi square method. The mean age of the students was 21.8 years. 36.9% (179 persons) of subjects had positive history and 8.9% (43 persons) of them had present Aphthous ulcer at the time of interview. 70.6% of students with positive personal history of Aphthous ulcer had positive family history of Aphthous ulcer too. Internal labial mucosa was the commonest site of the lesion among the subjects with present Aphthous ulcer. We found that gender, positive family history, the field of study, the form of diet and stress had a major correlation with the incidence of Aphthous ulcer.
Saeedeh Eris, Ezzat Ollah Ghaemi , Abdolvahab Moradi , Azad Reaza Mansourian , Mohammad Reza Rabiei , Sepideh Bakhashande Nosrat , Ali Amirchaghmaghi and Ali Reza Ahmadi , 2007. Aphthous Ulcer and the Effective Factors on It`s Incidence among the Students of Golestan Medical Sciences University in the North of Iran. Journal of Biological Sciences, 7: 830-832.