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Does fluoride gel/foam application time affect enamel demineralization?

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    The Journal of the Tennessee Dental Association
    |September 23, 2014
    PubMed
    Summary
    This summary is machine-generated.

    A one-minute application of acidulated phosphate fluoride (APF) effectively reduces enamel demineralization, matching the efficacy of a four-minute application. This finding supports shorter fluoride treatment times for caries prevention.

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    Area of Science:

    • Dental Science
    • Cariology
    • Materials Science

    Background:

    • The American Dental Association recommends four-minute topical fluoride applications for caries reduction.
    • Some manufacturers suggest one-minute applications may be sufficient, creating a discrepancy in recommended treatment times.

    Purpose of the Study:

    • To evaluate if a one-minute application of acidulated phosphate fluoride (APF) gel or foam is equivalent to a four-minute application in reducing enamel demineralization.
    • To compare the anti-demineralization effects of different APF application durations in a laboratory setting.

    Main Methods:

    • Polished bovine enamel samples were treated with APF gel or foam for one or four minutes, with a control group receiving no fluoride.
    • Treated enamel samples were exposed to pooled human saliva and then subjected to lactic acid gel to simulate early caries.
    • Enamel hardness was measured before and after treatment, with the difference indicating demineralization; statistical analysis (ANOVA/Student-Newman-Keuls) was performed.

    Main Results:

    • All APF-treated groups showed significantly less enamel demineralization compared to the control group.
    • There was no statistically significant difference in enamel demineralization reduction between one-minute and four-minute APF applications.
    • Both APF gel and foam demonstrated efficacy in reducing enamel demineralization.

    Conclusions:

    • A one-minute application of APF gel or foam is as effective as a four-minute application in reducing enamel demineralization.
    • Shorter application times for professionally applied topical fluoride may be sufficient for caries prevention, aligning with clinical evidence for efficacy.