Educational intervention based on health belief model improved the use of dental floss in female students; however, no significant changes were reported for the use of brush. Also, an increase for students’ perceived sensitivity in experimental group. After intervention, these students paid more attention to their oral health. The analysis of perceived intensity revealed a similar result, which are students in experimental group gained more understanding of this issue after intervention. Given the fact that the more students perceive the sensitivity and intensity of the issue, the more they will employ preventive behaviors (10, 15), it can be argued that