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Relationship between total fluoride intake and dental fluorosis in areas polluted by airborne fluoride

Relationship between total fluoride intake and dental fluorosis in areas polluted by airborne fluoride

Fluoride 29(1): 7-12

The relationship between fluoride (F) exposure and dental fluorosis in three (two experimental and one reference) villages in Jiangxi Province, China, has been studied. Total daily F-intakes by adults in the two F-exposed areas, Changping Village and Wenpan Village, were 3.16 and 3.01 mg, whereas the incidence of dental fluorosis was 51.8% and 57.4%, respectively. Airborne F levels of the two experimental villages were similar to each other, but the SO-2 level in the air was higher in Wenpan Village than in Changping Village. On the other hand, food borne F levels in Changping Village was higher than those in Wenpan Village. The levels of kitchen airborne F and SO-2 in the experimental areas were much higher than those in the reference area. Results from animal experiments showed that more dental lesions occurred in rats exposed to both F and SO-2 than in those exposed to F alone. These results suggest that SO-2 may be important in enhancing F-induced dental fluorosis.

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