Khalid Al Hezaimi, Abdul Salam Al Malik, Shahid Mahmood, Arham Chohan, Amjad Wyne.
Fluoride release from a glass-ionomer cement and a compomer: An in-vitro preliminary study.
J Pak Dent Assoc Jan ;11(1):9-14.

OBJECTIVE: The aim of the study was to launch a preliminary study to compare the amount and pattern of fluoride release from two fluoride containing restorative materials namely the Ketac-Molar (a self cured glassionomer) and Dyract (a light cured compomer). MATERIALS AND METHODS: Four cylindrical specimens were prepared for each material utilizing Teflon molds. The specimens were suspended in separate vials containing artificial saliva and demineralized acidic solutions, and kept in an incubator at 37 degree centigrade. The fluoride release was measured at daily intervals for 14 days. To ensure an accurate fluoride concentration, the specimens were removed from the test vials after each measurement, rinsed with deionized water and shifted to a new set of vials containing the artificial saliva and demineralized acidic solution. An equal volume (10 ml) of buffered solution was also added to the vials. The ion spectrophotometer (HICK - USA) was used to measure the fluoride release, which was recorded as part per million (ppm). RESULTS: The results were analysed using ANOVA (Analysis of variance) and Tukey`s Multiple Variance Test. There was no significant difference (P = 0.481) between the two materials in terms of cumulative fluoride release. However, comparison within the media showed a significantly high (P < 0.001) cumulative fluoride release in artificial saliva. CONCLUSIONS: The study concludes that there was no significant difference between the two materials in cumulative fluoride release over two weeks period in the two media respectively. But, there was a difference in the cumulative fluoride release in terms of the medium used.

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