dental fluorosis in children

some children of borazjan area have minute white flecks, yellow or brown spot areas scattered irregularly over the tooth surface, the causative factor was attributed to excess of fluoride in water. to verify this matter short chemical examination of water samples from endemic area was carried out. the results of water analysis by colorimetric method, using zirconium a1izarin reagent after distillation the samples, showed that the average mount of fluoride of borazjan and the mixture of treated. water of boshigan river with water piped of borazjan wells were 4 and 2 times respectively more than recommended control limits for fluoride and confirmed that this was the causative agent of mottled, teeth (dental fluorosis).