INFLUENCE OF PROTECTING AGENTS ON THE SOLUBILITY OF GLASS IONOMERS

Purpose: To evaluate the influence of protective agents (varnish and g laze-resin resin) on water solubility of two glass ionomer restorative cements (Chelon-Fil and Vidrion-R), with the graviometrical test (A.D .A. Specification No 9). Materials ann Methods: Fifteen samples of eac h restorative cement were obtained and divided in one control and two experimental groups: (a) control, no protection; (b) protected with va rnish; (c) protected with glaze-resin. On the two experimental groups, after the initial gelification reaction, the specimens were protected and immersed in distilled water for the period of 1 and 24 hours. Res ults: The two glass ionomer restorative cements tested required surfac e protection to avoid the early solubility. Among the protective mater ials evaluated, the varnish was the most effective agent.