Effect of Increased Fluoride Contents on Fluoride Release from Glass Ionomer Cements.

Abstract

Monadle R. Hadi.

Background: Because of chemical bonding and fluoride release to the surrounding tooth structure, glass ionomer cement has been used as a restorative material for its. This study aims to investigate if boosting fluoride contents in cement powder can increase the fluoride that is released from the set cement.
MATERIALS & METHODOLGY: Two types of cements have been prepared with the excess fluoride contents: cement (1) as the conventional chemical-cured, and cement (2) as the light-cured resin-modified glass ionomer cement. Two commercial cements were used for comparison, cement (3) has been chemically-cured (RIVA), and cement (4) has been light-cured (RIVA). For each type of cement, there were five specimens used in the shape of discs with 6mm diameter and 3mm height. The specimens were submerged in artificial saliva solution for periods of 1 day, 1week, 2 weeks, 1 month and 2 months. The number of fluoride ions, which were released in the saliva solution has been measured by a specific fluoride ion electrode connected to an ion- analyzer.
RESULTS: The test components (1 and 2) have indicated that fluoride release is more than the commercial cements (3 and 4). The whole amount of fluoride release from the resin-modified cement (2) was more than the conventional cement (1) throughout the test period.
CONCLUSSION: The prepared cements’ fluoride release was higher than the commercial cements. Increasing fluoride percentage within the cement formula has led to increase fluoride release of the set cement.