Caries inhibiting effect of ammonium fluoride varnish in vitro
Shi, S.T.
Zhonghua Kou Qiang Yi Xue Za Zhi 24(6): 353-355; 386
1989
ISSN/ISBN: 1002-0098 PMID: 2517827 Document Number: 335593
The reaction of incorporation of fluoride into tooth enamel from NH4F varnish, and Duaphat were measured using SEMq2 in vitro. Level of enamel uptake of fluoride was highest in teeth treated with NH4F varnish. Average depth of fluoride penetrated into enamel was more than 80 microns from the two varnishes. Prolonged coating duration from 24 hours to 1 week did not increase uptake and penetration of fluoride from both varnishes. The NH4F varnish was found to be superior to Duraphat in terms of inhibiting artificial caries lesion formation (P less than 0.001).