Lots of samples fell outside of the recommended parameters, loads of water samples from Brazilian municipalities analyzed in this study had appropriate fluoride levels. This inability to efficiently control fluoride levels can reduce the effectiveness of preventive measures or increase inhabitants’ risk of developing dental fluorosis. Fluoride levels in the public water supply must be kept constant and adequate for the population to gain preventive benefit. Of the 6862 samples analyzed, the fluoride levels of 53 dot 5, and minimum and maximum concentrations for samples from every municipality in the course of the 48month study period. The fluoridation of public water supplies is considered the most efficient public health measure for dental caries prevention. Make sure you leave a few comments about it below. The aim of this study was to analyze fluoride levels in the public water supply of 29 Brazilian municipalities during a 48month period from November 2004 to October Three collection sites were defined for any source of municipal public water supply. Water samples were collected monthly and analyzed at the Research Laboratory of the Nucleus for Public Health, Public Health Postgraduate Program, Araçatuba Dental School.
In a study that monitored municipal control of fluoride levels in Niteroi, RJ, Brazil for 1 year, Maia et al dot 25 found that treated water showed a wide variation in fluoride concentration and 96 of samples had inadequate concentrations.
2mg F/L, and municipalities promptly corrected such fluoride overdosing to avoid the risk of dental fluorosis, Only 4 of our samples had fluoride levels>.
During the study period, regarding the maintaining fluoride levels in the public water supply dot 25 These findings indicate that the external control of water fluoridation may safely and reliably prevent large variations in fluoride levels in public water supplies.
During the 48 months, 6862 water samples were analyzed in duplicate from 193 collection sites in 29 participating municipalities.
The collection sites were established depending on the number and location of supply sources and water treatment plants in any municipality. Table 1 shows the number and percentage of samples from the public water supplies of any city, classified conforming to fluoride level. Remember, in this longitudinal study conducted from November 2004 to October 2008, fluoride levels were analyzed in the public water supplies of 29 cities in northwestern São Paulo State. The researchers obtained water supply system data from the secretaries of health, oral health coordinators, and those responsible for the public water supply in any municipality. Declaration of Interests. As expected in locations with appropriate fluoride levels, the authors found that most fluorosis was mild14 and that the prevalence of fluorosis was higher among children in the city with better control of fluoride concentration.
Fluoride concentration was homogeneous in the water of one city and variable in the other, Catani et al dot 13 evaluated the prevalence of dental fluorosis among schoolchildren in two cities in the state of São Paulo with different means of controlling optimal fluoride concentration in public water supplies. 01mg F/L are associated with decreased numbers of teeth with caries dot 1 At levels>1mg F/L, teeth increasingly show signs of fluorosis, but no further reduction in the total number of teeth affected by caries is achieved dot 12 Previous studies have examined the relationship between fluoridated water and the occurrence of dental fluorosis, natural levels of fluoride ions in water>. Thus, mechanisms must be developed to allow the adaptation of fluoride concentrations in public water supplies, thereby increasing the effectiveness of dental caries prevention and control and reducing the prevalence of dental fluorosis dot 27 the control of fluoride concentrations performed by sanitation companies, external control by sanitary monitoring agencies and akin public or private institutions is necessary.
Given the importance of the continuous maintenance of fluoride levels within recommended limits, so this study analyzed fluoride levels in the public water supplies of 29 Brazilian cities during a ’48 month’ period. The fluoridation of public water supplies can efficiently provide public health benefits only through the constant evaluation of the fluoridation process to ensure that adequate fluoride levels are maintained. Only 53 dot 5percentage of the samples analyzed in this study had fluoride levels within the recommended parameters. With that said, a bunch of samples with fluoride concentrations outside of the recommended range represented underdosing, that has no effect on dental fluorosis and akin health risks but provides a minimal benefit in the prevention of dental caries. The relatively high percentage of samples falling outside of these parameters demonstrates the difficulty that cities face in maintaining constant fluoride levels in drinking water.
Samples from 193 collection sites were analyzed monthly in duplicate for 48 months at the NEPESCO Laboratory of UNESP.
Fluoride levels were determined using an ion analyzer coupled to a specific electrode for fluoride.
While taking into account the expected range of sample values, Equipment calibration was performed in triplicate to reduce the margin of error. With that said, 1mL was collected from every standard after the addition of 1mL total ionic strength adjustor buffer, an ionic pH adjustment buffer with non complex strength that is used widely in fluorine analysis, For this purpose, dilutions from a standard 100 mg/L fluoride solution were used. Saliba et al dot 18 analyzed similar samples from northwestern São Paulo State during a 6 month period, and found a lower percentage of water samples with fluoride levels within recommended parameters in comparison with the results of the present study.
This temporal increase in the proportion of water samples with appropriate fluoride levels demonstrates the importance of longitudinal studies and the effectiveness of constant monitoring, that facilitates the operational control of water fluoridation procedures and improves the quality of public water supplies dot ’19 23′ In another study of eight cities in northwestern São Paulo State conducted during a 36 month period from November 2004 to October 2007, Saliba et al dot 24 found a higher proportion of water samples with fluoride levels within recommended parameters. It going to be noted that these eight cities used a single water source.