The   aim   of   this   study   was   to   evaluate the rate of fluorosis among

   students of intermediate schools in Bahar city in 1998-99.

         We   examined   2502   students , 1247   girls   and 1255  boys aged 12-15

   years old. The type of the fluorosis determined by the use of Dean’s index.

         The   results   of   this   study   showed  that  total rate of fluorosis was 24.5

   Percent, 24.8% in girls  and 24.1% in boys. 1.1%  had  moderate fluorosis and

   4.8% had  mild  fluorosis  and  11.3%  had  very  mild   fluorosis and 7.3% had

   doubtful , none  of  the children had sever dental fluorosis. Among different

   tooth a maxillary central incisor was the most affected one and mandibular

   lateral incisor was the least one.

         Although    the   prevalence   of fluorosis was 24.5% in studied cases, but

   according to FCI index it is not a communitry health problem.