title: Relative solubilities of hybrid ionomers and compomers by acid impingement.
abstract: The purpose of this investigation was to determine the relative erosion/solubility for hybrid glass-ionomers and a compomer using the jet-impingement technique with lactic acid of various molarities. The materials studied included Dyract, Duet, Vitremer, Advance, Fuji-II LC, and Fuji-I, Ketac Cem and Modern Tenacin as the control. Data were analysed using ANOVA and Tukey's comparison test. Results indicated that depth of erosion/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 at 0. 05 M). All glass-ionomers materials and the compomer revealed weight changes at 0.1 M after 24 h, in the following increasing order: Dyract < Fuji-II LC=Duet < Advance < Vitremer. It was concluded that weight loss is a better parameter to characterize these new hybrids glass-ionomers and compomers for erosion/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 measured in most laboratories and thus used for statistical comparison.
authors.affiliation: University of Illinois College of Dentistry, Chicago 60612-7210, USA. bapnam@uic.edu
authors.forename: M S
authors.initials: MS
authors.lastname: Bapna
authors.forename: H J
authors.initials: HJ
authors.lastname: Mueller1
mesh_terms: D000704:Analysis of Variance; D020770:Compomers / Q000737:chemistry*; D004305:Dose-Response Relationship, Drug; D004347:Drug Interactions; D005899:Glass Ionomer Cements / Q000737:chemistry*; D019344:Lactic Acid / Q000494:pharmacology*; D008422:Materials Testing / Q000379:methods / Q000706:statistics & numerical data; D019279:Resin Cements / Q000737:chemistry*; D012995:Solubility; D013997:Time Factors
chemical_list: D020770:Compomers; D005899:Glass Ionomer Cements; D019279:Resin Cements; D019344:Lactic Acid