Duration of Cariostatic Effect with 250ppmF⁻ of Fluoride Mouth Rinsing Solution : New DMFT after Fluoride Mouth Rinsing
| Jazyk: | japonština |
|---|---|
| Rok vydání: | 2002 |
| Předmět: | |
| Zdroj: | 岐阜歯科学会雑誌 = The journal of Gifu Dental Society. 29(1):1-11 |
| ISSN: | 0385-0072 |
| Popis: | 本研究は、小学校において6年間フッ素濃度250ppmのフッ化物洗口法を実施した児童の小学校卒業後のう蝕発生状況を検索する目的で、小学校卒業時の健全歯と卒業後の新萌出歯について中学3年生までのコホート調査を行った。中学3年生まで新う蝕発生のない者は対照群に比較して男子3.5〜4.5倍、女子1.5〜2.5倍であり、う蝕予防効果の持続性が確認された。第二大臼歯については、卒業時健全歯より卒業後新萌出歯の方がう蝕発生は少ないことが示されたが、いずれもフッ化物洗口群において有意の差でう蝕予防効果が認められた。このことから、フッ素濃度250ppmのフッ化物洗口法終了3年後においても、う蝕予防効果の持続性が期待できることが確認された。 We studied the duration of the caries prevention effect of fluoride mouth rinsing in subjects that used a 250ppmF solution for 6 years, from first grade through sixth grade. This was a cohort study that followed subjects from elementary school graduation to the third year of junior high school. The subjects were 685 children attending four different elementary schools. In the fluoride group, there were 529 children at three schools, and in the control group, there were 156 children at one school. The results of oral examinations in junior high school were analyzed by the distribution of DMFT and the new DMFT rate for each tooth type (existing second molars in elementary school and newly erupted second molars in junior high school). Second molars erupted in some subjects while they were in elementary school. These second molars were affected by the fluoride rinse, but those that erupted after the subjects left elementary school were not affected by the rinse. We compared these two groups to determine whether there was a difference in caries development. Subjects in the fluoride group without new caries development were compared with the control group during the third year of junior high school. In the fluoride group, there was no new caries development in 3.5-4.5 times more boys and 1.5-2.5 times more girls than in the control group. Second molars were used for reference in both groups, and the DMFT rate was significantly lower in the fluoride group. When the DMFT rate for second molars in the fluoride group was divided by existing teeth and newly erupted teeth and the results were analyzed, the DMFT coefficient for newly erupted teeth was lower than that for existing teeth in both groups. From these findings, we conclude that there is a prolonged cariostatic effect in junior high school children that have performed fluoride mouth rinsing for 6 years in elementary school. |
| Databáze: | OpenAIRE |
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