Effects of Flourid on Child Dental Caris in

If the fluoride concentration in drinking water is lower than the standard level, it causes dental caries and if it be more than standard level it causes dental fluorosis. The aim of this study was to determine whether a relationship exists between the groundwater fluoride(F) concentration and dental caries in children living in 7 areas of Nourabade Mamasani town in Iran. F level of the town drinking water was measured by the SPADNS method. All the children of the 4 age groups of 6, 9, 10, and 12 were sampled for a total of 3349 in seven districts of the town. All the 28 teeth of the children were subject to this test. The drinking water in the region is totally of groundwater supply. The residents have essentially the same socio-economic living standards and nutritional conditions. In these 7 areas, the F level in the drinking water was from 0.53 to 1 mg/L., While the number of decayed permanent(Dt) teeth per child ranged from 0.13and 0.34 to the number of decayed deciduous(dt) teeth ranged from 0.5 to 3.9 Although the F level in the drinking water was below the national level, the dental caries were below the national level. Over this narrow concentration range, there appeared to be a weak association between the F level in the drinking water and Dt and dt. Linear regression analyses showed very weak decreases of the Dt and dt scores with increasing water F level is not significant. Discussion & This study shows that in low concentrations of F ranging 0.1 to 0.53mg/L, there is a negligible effect on prevention of dental caries.