The Fluoride Release from Fluoride Releasing Resins and the Effect of the Fluoride on the Apatite Pellet

Abstract

The aim of this study was to estimate three kinds of fluoride (F) releasing resins, compared with one kind of glassionomer cement. The F releasing materials used were: light cured F releasing bonding agent for orthodontic treatment(FB), light cured F releasing composite resin (FE), light cured F releasing resin for fissure sealant (TF) and glassionomer cement (HY). The amount of F released from these materials was measured for 30 days. The uptake of F with the apatite pellet, which was immersed in distilled water for 30 days in contact with F releasing materials, was determined.
The apatite pellet was characterised by X-ray diffraction study. The results obtained were as follows.
1. The amount of F released was the greatest with FB, followed by HY, FE and TF.
2. The greater the F released, the more the F uptake with apatite pellet was. The amount of F released from each F releasing material was similar to its F uptake with apatite.
3. The X-ray diffraction analysis could not reveal any formation of CaF2 in the apatite pellet in contact with the F releasing materials.