Document Type: Original Article


1 Assistant Professor, Department of Operative Dentistry, School of Dentistry, Yazd University of Medical Sciences

2 Dentist

3 Teacher


Statement of Problem: Nowadays in all developed countries, attention to health and prevention of disease occurrence has priority to treatment. High fluoride intake through drinking water is one of the important factors of dental flourosis. Purpose: This study investigates the prevalence of dental fluorosis and its relationship with level of fluoride in drinking water among children aged 12-15 years old throughout a community in Southern Iran.Materials and Methods: The study was a cross-sectional and cluster random sampling method. 406 guidances school 406 students (186 females and 220 males aged 12-15 years) in Bastak and its suburb, belonging to the city of Bandar Lenge in Hormozgan Province during 1380 were entered our study. ANOVA and t. test were used for statistical analysis by SPSS software.Results: The study showed that high levels of water fluoride amount was the cause of prevalence and severity of dental fluorosis in the area. For instance, the rate of water fluoride in Harang village (1.55 PPM) compared to Jonahs village (0.75 PPM) showed a higher prevalence of dental fluorosis in Harang. The community flourosis index (CFI) was 0.83 which was 0.96 and 0.02 in anterior maxilla of boys and girls respectively and in posterior maxilla were 0.81 and 0.89 respectively. In anterior mandible, these figures were 0.77 and 0.84 and in posterior mandible were 0.65 and 0.71.  Conclusion: Considering the average level of fluoride in water (1.05 PPM) and the average of local temperature (26.1ºC) with CFI of the (0.83), we can conclude that the rate of fluoride in drinking water of this area was above the WHO recommendation. Finally, we suggest that the level of fluoride should be reduced in local drinking water.Key words: Fluoride, Fluorosis, CFI, Bastak