Effects of Fluoride Mouth-rinsing Solution on the Enamel

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  • KANI Tokuko
    Department of Oral Health and Preventive Dentistry, Gifu College of Dentistry
  • KANI Mizuo
    Department of Oral Health and Preventive Dentistry, Gifu College of Dentistry
  • TOMIMATSU Sanae
    Department of Oral Health and Preventive Dentistry, Gifu College of Dentistry
  • SHINKAI Kenshi
    Department of Oral Health and Preventive Dentistry, Gifu College of Dentistry
  • KONO Setsu
    Department of Oral Health and Preventive Dentistry, Gifu College of Dentistry
  • KUBO Noriaki
    Department of Oral Health and Preventive Dentistry, Gifu College of Dentistry

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  • エナメル質におよぼすフッ化物洗口液の影響について第2報フッ素取込量と流出量について
  • エナメルシツ ニ オヨボス フッカブツ センコウエキ ノ エイキョウ ニ ツイ

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Abstract

The present study was made to examine the effects of fluoride mouth-rinsing solutions on the enamel by chemical analysis. Experiments were made in vitro of fluoride mouthrinsing and fluoride topical application, with the powdered enamel as material, and the findings were compared. Phosphoric acid-acidified NaF solution (500 ppm of F-; pH 5.0) was used as the fluoride mouth rinse, and compared with the acidulated phosphate fluoride solution (F: 0.9%; pH 3.6) for topical application.<BR>The uptake of fluoride by the enamel was determined by Wharton's microdiffusion method and the Zr-SPADNS method. On the daily collected distilled water in which the powder was immersed as a sample, the calcium content was determined by Yanagisawa's method, using plasmocorinth B, the fluorine content by an ORION ion meter (model 801) and fluoride ion electrodes; and the phosphorous content by Dryer's method.<BR>In the experiments of fluoride mouth-rinsing, the fluorine content of the enamel powder was about 2000ppm in the first rinsing experiment, and it proved to increase with time. The fluoride in the enamel powder remained and caused the enamel solubility to decrease. In the experiments of topical application, a large amount of CaF2 was formed, which was washed out in distilled water.

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