Inspection Analysis of Endemic Fluorosis in Liangshan County of Shandong Province in Ten Years

[Objective] To understand the effect of endemic fluorosis prevention and the dynamic epidemic changes in Liangshan County and provide scientific evidence for the establishment of preventive countermeasures.[Methods] According to the methods and requirement of the national survey scheme of endemic fluorosis,investigation was carried out on the water-improving process,water-improving facilities management and fluoride content of drinking water in Liangshan county;examination was made on the fluoride concentration in twig water,dental fluorosis morbidity and urine fluoride among children aged from 8 to 12 and the clinical and X-ray situation of skeletal fiuorosis among people over 16.[Results] 215 endemic fluorosis villages were found in Liangshan County,137 of which have carried out water-improvement(63.70%);the standard exceeding rate of fluoride content in the normally running projects was 28.74%;the twig water fluoride content in the survey spot remained below 0.50mg/L in the continuous ten years in Dongxu Village;among the children aged from 8 to12,the morbidity of dental fluorosis decreased every year,the detection rate was 0 in 2006,the urine fluoride level was below 1.40mg/L in the continuous inspection;the positive rate of the X-ray skeletal fluorosis decreased gradually from 64.58% to 16.67% among the adults over 16(P0.01);no case of level III was detected.[Conclusion] Water-improvement to reduce fluoride is the most effective measure for controlling drinking water fluorosis;however,the process of water-improving is quite slow in the inspected county and the facilities are not sufficiently applied;investment should be increased in order to the improve fluorosis control.