Abstract
Objective: The purpose of the paper is to provide the result from investigation on the current situation of coal-burning fluorosis prevalence in Chongqing City and make an assessment on the prevention and curing measures. Method: The Dean’s Method is applied to investigate on the fluorotic teeth of locally-born children aged between 8 to 12; investigate how modified cooking stoves are utilized by households and how food maize and hot pepper are being dried; and test the urinary fluorine content and pepper fluorine content. Result: The investigations show that, in the 661 villages with illness history from the 100 townships of 13 districts in Chongqing City, 11.28% (7464/ 66,162) of the children aged between 8 and 12 suffer from dental fluorosis; the stoves modified rate, qualified rate of modified stoves, and correct utilization rate of qualified modified stoves are respectively 100%, 98.82%, and 99.45%; and food maize and hot pepper’s drying rates are respectively 99.88% and 99.75%. Conclusion: The result shows that the coal-burning type fluorosis prevalence in the endemic area of Chongqing City has decreased dramatically, the preventive measure is effectively implemented, and a long-term preventive mechanism has preliminarily been established.
Highlights
Regional Fluorosis caused by coal-burning pollution (“coal-burning fluorosis” for short) is a kind of cumulative chronic poisoning suffered by people who live in the area with high content of coal-burning fluorine pollution for a long period of time and take in excessive fluorine through water, air, food, and some other media
The pathogen of coal-burning type fluorosis in Chongqing City was brought in mainly by intake of food fluorine such as maize and hot pepper, etc. [4] in the 80s of the last century, and gradually by intake of air fluorine [5], and the total intake of fluorine through such way has seen a distinct drop [6]. This survey shows that the dental fluorosis prevalence rate for children aged between 8% and 12% is 11.28%, dental fluorosis index is 0.14, and dental defect rate is 0.29, meaning that such prevalence belongs to a kind of negative prevalence
There are 19 villages whose dental prevalence rate is higher than 30%, taking up 2.87%, respectively distributing in Wushan (14), Wuxi (3), and Qianjiang (1), indicating an obvious decrease of children’s dental fluorosis prevalence in our City
Summary
Regional Fluorosis caused by coal-burning pollution (“coal-burning fluorosis” for short) is a kind of cumulative chronic poisoning suffered by people who live in the area with high content of coal-burning fluorine pollution for a long period of time and take in excessive fluorine through water, air, food, and some other media. Tests were conducted as per the National Standard (WS/T30-1996) to calculate the geometric mean and standard deviation for obtaining the urinary fluorine content of the sampled children. D) For maize fluorine content: 10 households from over 3 endemic villages of every county were sampled to test the fluorine content in the maize according to the National Standard (GB/T5009-2003) by calculating the median and standard deviation. E) For Fluorine content in hot pepper: 10 households from over three endemic villages of every endemic county for testing the food pepper in accordance with the National Standard (GB/T5009-2003) by calculating the median and standard deviation. This research has been approved by department of health and family planning commission in Chongqing We conducted this investigation according to the ethic guideline about the medical system study for people
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