Article

[The optimal concentration of drinking water in eastern Guangdong].

Department of Stomatology, First Affiliated Hospital, Sun Yat-Sen University of Medical Science.
Hua xi kou qiang yi xue za zhi = Huaxi kouqiang yixue zazhi = West China journal of stomatology 03/2001; 19(1):38-40. pp.38-40
Source: PubMed

ABSTRACT 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.

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Keywords

35-44 years old residents
 
acceptation
 
background information
 
criteria
 
Dean's criteria
 
Dental caries
 
dental fluorosis
 
Dental Fluorosis Index
 
drinking water
 
Eastern Guangdong
 
health administrative department
 
major factor influencing dental fluorosis
 
occurrences
 
optimal concentration
 
optimal fluoride concentration
 
upper limit