Fluoride release from aesthetic dental materials

The objective of the study was to compare the amounts of fluoride released by two glass-ionomer cements, a resin-modified glass-ionomer cement, a comp omer and a fluoride-containing composite into deionized water and artificia l saliva. Disc samples of each of the materials were fabricated and placed in either water or artificial saliva. Fluoride analysis of the media was pe rformed periodically over 64 days. The data were analysed to show the rate of fluoride release per cm(2) per hour for each material. The results showe d that the fluoride release rate for all the materials in both solutions de creased dramatically after 24 h. The release rate in artificial saliva was significantly less than in water (P<0.001). The resin-modified glass-ionome r cement consistently displayed the highest fluoride release rate per hour into both media.