EROSION AND COMPRESSIVE STRENGTH OF HYBRID GLASS IONOMER CEMENTS WHENLIGHT ACTIVATED OR CHEMICALLY SET

It is claimed that light-activated hybrid glass ionomer cements offer advantages over the conventional glass ionomer lining materials. The c ompressive strengths and erosion rates of two hybrid glass ionomer lin ing cements, when light activated and chemically set, were compared wi th conventional glass ionomer cements. The results demonstrated that t he erosion rates of the light-activated materials were comparable with those of the conventional materials. The conventional material, Ketac -Bond(R), was stronger than the light-activated hybrids. When the hybr id materials were allowed to set chemically alone, their performance w as inferior to the conventional glass ionomer lining cements.