Relative solubilities of hybrid ionomers and compomers by acid impingement

The purpose of this investigation was to determine the relative erosion/sol ubility for hybrid glass-ionomers and a compomer using the jet-impingement technique with lactic acid of various molarities. The materials studied inc luded Dyract(R), Duet(R), Vitremer(R), Advance(R), Fuji-II LC(R), and Fuji- I(R), Ketac Cem(R) and Modern Tenacino as the control. Data were analysed u sing ANOVA and Tukey's comparison test. Results indicated that depth of ero sion/solubility with hybrid glass-ionomers and compomers was not measurable by the normal procedure. Similarly, weight changes were not detectable at 0.002, 0.02 and 0.05 M (except for Advance(R) at 0.05 M). All glass-ionomer s materials and the compomer revealed weight changes at 0.1 M after 24 h, i n the following increasing order: Dyract(R) < Fuji-II LC(R) = Duet(R) < Adv ance(R) < Vitremer(R). It was concluded that weight loss is a better parame ter to characterize these new hybrids glassionomers and compomers for erosi on/solubility by jet-impingement. In addition, a lactic acid of minimum 0.1 M as a test solution is required to generate 24 h-data that can be measure d in most laboratories and thus used for statistical comparison.