In vitro fluoride uptake by enamel adjacent to a glass ionomer luting cement.

The release of fluoride from a glass ionomer luting agent used to cement an orthodontic band was shown to increase enamel fluoride levels of adjacent teeth in vitro. The fluoride uptake was statistically significant at gingival biopsy sites after one month. There was an inverse relationship between baseline fluoride levels of the biopsied teeth and the amount of fluoride taken up by the enamel.