Durability of the anti-demineralization effects of fluoride varnish on dental root sur-faces:An in vitro study
10.19723/j.issn.1671-167X.2025.01.011
- VernacularTitle:氟保护漆抗牙根面酸蚀脱矿的耐久性体外研究
- Author:
Hongyan TIAN
1
;
Xue CAI
;
Xiaoyan WANG
Author Information
1. 北京大学口腔医学院·口腔医院门诊部,国家口腔医学中心,国家口腔疾病临床医学研究中心,口腔生物材料和数字诊疗装备国家工程研究中心,北京 100081
- Publication Type:Journal Article
- Keywords:
Topical fluorides;
Duraphat;
Root caries;
Durability
- From:
Journal of Peking University(Health Sciences)
2025;57(1):73-77
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To study the durability of the anti-demineralization effects of fluoride varnish af-ter being applied to dental root surfaces.Methods:Coronal and radicular dentin samples were prepared from extracted human teeth.Duraphat?(DP)was applied to the dentine surfaces to form a protective film.The film-dentin interfaces were observed by scanning electron microscopy(SEM)and the fluoride element was analyzed with energy dispersive spectrometer(EDS).Thus,the differences between apply-ing DP on crowns and roots were compared.Radicular dentin samples were prepared and randomly divi-ded into four groups:(1)Blank:DP was not applied,and demineralized in acetic acid(pH 4.5)for 4 days;(2)Blank+aging:DP was not applied,the samples were put into deionized water for 14 days at room temperature,and then demineralized in acetic acid(pH 4.5)for 4 days;(3)DP:DP was applied and demineralized in acetic acid(pH 4.5)for 4 days;(4)DP+aging:DP was applied,the samples were put into deionized water for 14 days at room temperature,and then demineralized in acetic acid(pH 4.5)for 4 days.Finally,SEM observation and EDS analysis of fluoride content were performed on film-dentin interfaces to evaluate the degree of demineralization,the morphology of DP film,and the penetra-tion of fluorine.Results:The immediate penetration depth of fluoride element from DP was deeper in the coronal dentin than that in radicular dentin.The samples in the blank and blank+aging groups demine-ralized significantly after acid etching.The DP group did not undergo demineralization,and the fluorine element penetrated to(76.00±8.94)μm below the interfaces.The structure of the protective film in the DP+aging group was damaged,but the underneath dentin did not undergo demineralization.The fluorine element still remained at a depth of(5.00±3.53)μm below the interfaces.Conclusion:DP has an anti-demineralization effect on the root surface,and this effect can still be exerted for a period of time after losing the structure of protective film.It has the ability to prevent root caries and a certain du-rability.
