著者

山根 勇

出版者

一般社団法人 日本口腔衛生学会

雑誌

口腔衛生学会雑誌 (ISSN:00232831)

巻号頁・発行日

vol.37, no.3, pp.319-341, 1987 (Released:2010-10-27)

参考文献数

48

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The purpose of this study was to compare the cariostatic effect of the daily use of three concentrations of fluoride mouth rinse. The subjects of this study were 487 (257 boys and 230 girls) school children at 6 years of age, who practiced mouth-rinsing with acid-acidified NaF solution containing 500ppm of F (pH 5.0), 250ppm of F (pH 5.0) and 100ppm F (pH 5.0) 5 times a week for 5 years. The experimental periods and number of subjects were as follows: 500ppm group: 1979-1984, 146 school children (76 boys and 70 girls) 250ppm group: 1981-1986, 166 school children (91 boys and 75 girls) 100ppm group: 1980-1985, 175 school children (90 boys and 85 girls) control group: 1984, 1985, 946 school children (470 boys and 476 girls). DMFT index and DMFT rate for each tooth type were calculated using cohort analysis for 5 years in the fluoride groups and a cross-sectional study in the control group.The three fluoride groups showed higher DMFT indexes than the control group at the start of the treatment. However, since the increment of DMFT indexes in the fluoride groups was reduced, a signi ficantly high cariostatic effect was obtained in the 6th grade. The 100ppm and 250ppm groups showed a tendency toward more effective caries prevention than the 500ppm group; girls especially showed a statistically significant difference in the DMFT index in the 4th, 5th, and 6th grades. The eru pted tooth rate was similar in each group and there was significant difference between the fluoride groups and the control group in the DMFT rate in 1, 2, 4, 6, and T.These facts indicate that three applications result an effective caries prevention and fluoride mouth rinses of 100ppmF and 250ppmF give the same or higher cariostatic effect as the use of 500ppmF mouth rinse.