Determination of optimal fluoride concentration in drinking water in an area in India with dental fluorosis

Abstract
The optimal F- concentration in drinking water was determined in a fluorotic zone. The area was divided in 4 parts on the basis of F- present in drinking water. A sample of 1320 persons was examined, where prevalence of dental fluorosis varied from 3.8%-65.4% depending on the fluoride concentration in drinking water. Statistically significant increase in the prevalence of dental fluorosis was found with the rise in F- in drinking water, with the rise in age, peak being found at 15-19 yr age group and among the bona fide residents of the area. A significant positive correlation was found between F- in drinking water and community fluorosis index. While determining the optimal level of F- in drinking water, values obtained were 1.05 parts/106, 0.8 parts/106 and 0.34 part/106, respectively, by different formulas in a fluorotic zone of western India.

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