Fluoride release from newly formulated resin-modified and conventional glass ionomer cements

الملخص EN

Background: Glass ionomer cement has been used as a restorative material for its chemical bonding to tooth structure and fluoride release to the surrounding tooth structure.

The aim of this study was to see if increasing the fluoride contents in the cement powder increases the amounts of fluoride released from the set cement.

Materials and Methods: Two types of cements were prepared with increased fluoride contents: cement (1) as light-cured resin-modified and cement (2) as chemical-cured conventional glass ionomer cements.

Two commercial cements were used for comparison, cement (3) was light-cured (Vivaglass), and cement (4) was chemically-cured (Nikang).

Five specimens for each type of cement were used as discs of 6mm diameter * 3mm height.

The specimens were immersed in artificial saliva solution for 1 day, lweek, 2 weeks, 1 month and 2 months.

The amount of fluoride ions released in the saliva solution was then measured using fluoride ion specific electrode connected to an ion- analyzer.

Results: The experimental cements (1 'and 2) showed increased amounts of fluoride release than commercial cements (3 and 4).

The total amount of fluoride release from the resin-modified cement (1) was more than that of conventional cement J2) through the time of test.

Conclusion: Fluoride release of prepared cements was higher than that of commercial cements.

Increasing fluoride contents within the cement formula led to increased fluoride release of the set cement.