THE EFFECT OF GLAZE ON RESTORATIVE GLASS-IONOMER CEMENTS - EVALUATIONOF ENVIRONMENTAL DURABILITY IN LACTIC-ACID SOLUTION

The surface texture changes of three kinds of glass-ionomer cements we re compared with glazed and polished cement surfaces after thermal cyc ling in a storage media [lactic acid solution (pH 4.0)]. The changes w ere measured with regard to the surface roughness, colour-change, glos s, hardness, toothbrush wear, and SEM (scanning electron microscope) o bservation in the laboratory. The glazed cement surface was not affect ed after thermal cycling in the lactic acid solution.