ABSTRACT
Since hygiene instructors can play important role in promoting and following oral hygiene instructions in schools, it was decided to investigate hygiene instructors knowledge and their attitudes about oral hygiene. This was qualitative-descriptive cross sectional study. Information was gathered by questionnaire containing 25 questions about knowledge and 8 questions about attitude. 188 hygiene instructors were selected randomly among 278 hygiene instructors present in primary schools in Isfahan. After questionnaires were approved by specialists, they were completed by hygiene instructors. The data were analyzed by SPSS software program and statistical analysis was carried out with analysis of Variance, T-test, ANOVA and Spearman correlation. The average of perssonals knowledge was 18.53 +/- 2.78 and domain was 11 to 24 [Total mark: 25]. The average of their attitude was 25.7 +/- 2.7 [Total mark: 32]. The T-test didn't show any relationship between attitude, knowledge and educational degree [i. e. Diploma VS bachelor degree]. There was no relationship between work experience and educational degree work experience and attitude, knowledge and attitude. The average of perssonals' knowledge showed statisfactory results and positive attitude. Periodic instructions and supervising hygiene inctructors in school can improve students' oral hygiene in school and this in turn can create healthier students overall