Yang J, Long Y, Shen Y
Department of Stomatology, First Affiliated Hospital, Sun Yat-Sen University of Medical Science.
Hua Xi Kou Qiang Yi Xue Za Zhi. 2001 Feb;19(1):38-40.
The objectives were to explore the optimal concentration of drinking water in Eastern Guangdong and to provide information for the health administrative department to set up the criteria for fluoride concentration.
Totally 1237 9-17 and 35-44 years old residents in Eastern Guangdong who drinking water containing 0.1-2.5 mg/L fluoride were recruited to investigate the occurrences of dental caries and dental fluorosis. Their background information and perceived appearances of teeth were also recorded.
The major factor influencing dental fluorosis was fluoride concentration in drinking water. Dental caries decreased when the fluoride concentration increased but dental fluorosis also increased at the same time. It was showed by calculation that the Dental Fluorosis Index would be 0.4 and 0.6 when the fluoride concentration was 0.57 mg/L and 0.7 mg/L respectively. The acceptation to the severity of dental fluorosis among the study subjects was in accordance with the Dean's criteria.
It suggests that the optimal fluoride concentration in Eastern Guangdong is 0.57 mg/L and should not exceed the upper limit of 0.7 mg/L.
探讨粤东地区饮用水的最佳氟浓度，为卫生行政部门制定氟浓度标准提供依据。
招募1237名年龄在9至17岁以及35至44岁、饮用含氟量为0.1至2.5mg/L饮用水的粤东居民，调查龋齿和氟斑牙的发病情况，并记录他们的背景信息和牙齿外观。
影响氟斑牙的主要因素是饮用水中的氟浓度。随着氟浓度升高，龋齿减少，但氟斑牙也同时增加。经计算表明，当氟浓度分别为0.57mg/L和0.7mg/L时，氟斑牙指数分别为0.4和0.6。研究对象对氟斑牙严重程度的接受程度符合迪恩标准。
提示粤东地区饮用水最佳氟浓度为0.57mg/L，且不应超过上限0.7mg/L。
