The effects of fluoride toothpaste and fluoride varnish on enamel remineralization and acid resistance:An in vitro study
10.3969/j.issn.1001-3733.2014.05.05
- VernacularTitle:含氟涂料和含氟牙膏对釉面再矿化和抗酸作用的实验研究
- Author:
Bowen YAO
;
Haokun XU
;
Shengchao WANG
- Publication Type:Journal Article
- Keywords:
Enamel;
Remineralization;
Fluoride toothpaste;
Fluoride varnish;
Acid resistance
- From:
Journal of Practical Stomatology
2014;(5):611-615
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To investigate the ability of fluoride toothpaste and fluoride varnish on enamel remineralization and acid resist-ance.Methods:Enamel specimens were prepared from bovine incisors,and were randomly divided into 4 groups(n=3)after acid-etching by 37%phosphoric acid.Specimens in group A(control)was processed daily with normal saline;those in group B and C were treated once with Duraphat varnish and Fluor Protector varnish respectively;in group D was daily processed with fluoride toothpaste. All specimens were incubated in artificial saliva for 2 weeks.Then all specimens received acid-etching again.Micro-hardness test, SEM observation and image analysis were performed before and after each step.Results:After 2 weeks of processing,no remineraliza-tion was found in group A.Varnish layers were observed on the surface of specimens in group B and C.In group D remineralization was detected on the enamel surface.After re-etching,micro-hardness decreased in group A and D.Fluoride varnish layers in group B and C showed strong resistance to acid-etching.After re-etching,area of micro-holes in group A and D increased(P<0.05 ),but that in group D was smaller than in the control(P<0.05).No micro-hole was observed in group B and group C.Conclusion:Protec-tive layer formed on the enamel surface by fluoride varnish is resistant to acid-etching and promotes enamel remineralization.Fluoride toothpaste application can promote enamel remineralization,but with less resistance to acid.
