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Results A total of 3,091 students aged 15-17 years (52.8% girls) participated in this study. The mean (SD) knowledge score of the respondents was 8.62 (2.53) and this was significantly higher for girls compared to boys (p less then 0.001). Significantly higher percentage of girls than boys knew the role of diet and oral hygiene in preventing caries (p less then 0.001). Knowledge about dental plaque was very limited in this population. Majority of the respondents believed that regular dental visits were essential (87.1%). The mean (SD) at