Residual Fluorine in the Mouth Following the Use of a Fluoride Mouth Rine

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  • KANI Mizuo
    Department of Oral Health and Preventive Dentistry, Gifu Collage of Dentistry
  • KANI Tokuko
    Department of Oral Health and Preventive Dentistry, Gifu Collage of Dentistry
  • TOMIMATSU Sanae
    Department of Oral Health and Preventive Dentistry, Gifu Collage of Dentistry
  • SHINKAI Kenshi
    Department of Oral Health and Preventive Dentistry, Gifu Collage of Dentistry
  • YAMAMURA Toshisada
    Department of Oral Health and Preventive Dentistry, Gifu Collage of Dentistry

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Other Title
  • フッ化物洗口法に伴う洗口液中フッ素の口腔内残留量について
  • フッカブツ センコウホウ ニ トモナウ センコウエキチュウ フッソ ノ コウコ

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Abstract

The present study was made for the purpose of reinvestigating the safty of fluoride mouth rinse, the possibility of caries-preventive effect and the rinsing method itself by determining the amount of fluoride that remains in the mouth after the use of fluoride mouth rinse.<BR>A total 80 children in the third grade of primary school (consisting of 44 boys and 36 girls) were selected as subjects. They were instructed to rinse with 10ml of the fluoride mouthrinsing solution (containing 500ppm of F-; pH 5.0, phosphoric acid-acidified NaF solution) that had been exactly measured for 30 seconds, and then rinse the mouth twice with 10ml of distilled water for 10 seconds at a time. The fluorine content of the portion of the agent that remained in the rinsing cup, the amount of fluorine that was spit out after use of the rinse, and the fluorine content of the rinsing distilled water were determined. For the determinations, an ORION ion meter (model 801) and fluoride ion activity electrodes were used.<BR>As a result, the sum of fluorine content of the portion of the rinsing agent that remained in the rinsing cup and the amount of fluorine that was spit out was 4.69±0.12mg in the boys and 4.58±0.12mg in the girls, corresponding to 93.79% in the boys and 91.52% in the girls of the amount of fluorine that had been given.<BR>Using the conventional rinsing method, the amount of residual fluorine in the mouth was 0.31±0.12mg (6.21%) in the boys and 0.42±0.12 (8.48%) in the girls. When the use of fluoride mouth rinse was followed by a rinsing with water, the retention of fluorine was 0.16±0.12mg (3.13%) in the boys and 0.27±0.12mg (5.46%) in the girls. In 65 children, corresponding to 81.3% of the total 80 children, the retention of fluorine after use of the conventional fluoride mouth rinse was less than 0.5mg.<BR>From these findings, it was proved again that the fluoride concentration and volume of rinsing solution is entirely safe provided the rinsing method is adequate, and fluoride mouth rinse is an effective fluoride application method for the prevention of dental caries.

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