title: Effects of added bioactive glass on the setting and mechanical properties of resin-modified glass ionomer cement.
abstract: In this study, the effects of added bioactive glass on the basic setting properties of a commercially available resin-modified glass ionomer cement were investigated with respect to setting time, mechanical strength, and setting mechanism. It was found to be clinically acceptable whether the setting time was extended or shortened depending on the type of bioactive glass added. The compressive strength of the set cement containing the bioactive glass decreased and was much higher when compared with the conventional type glass ionomer cement containing bioactive glass. The Fourier-transform infrared and 13C CP/MAS-NMR spectroscopies revealed that the extent of the acid-base reaction was larger in the cements containing bioactive glass than in the commercial resin-modified glass ionomer cement because of its high basicity in the bioactive glass. The 27Al MAS-NMR showed that crosslinking of the carboxylates in the polymeric acid by Al proceeded less in the cement containing the bioactive glass.
authors.affiliation: Department of Biomaterials, Faculty of Dental Science, Kyushu University, 3-1-1 Maidashi, Higashi-Ku, Fukuoka 812-8582, Japan. ikadewi@dent.kyushu-u.ac.jp
authors.forename: Ika Dewi
authors.initials: ID
authors.lastname: Ana
authors.forename: Shigeki
authors.initials: S
authors.lastname: Matsuya
authors.forename: Michio
authors.initials: M
authors.lastname: Ohta
authors.forename: Kunio
authors.initials: K
authors.lastname: Ishikawa
mesh_terms: D001672:Biocompatible Materials / Q000737:chemistry*; D002484:Cementation / Q000379:methods*; D019245:Compressive Strength; D005898:Glass / Q000737:chemistry*; D005899:Glass Ionomer Cements / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D008422:Materials Testing; D011208:Powders; D019279:Resin Cements / Q000737:chemistry*; D013499:Surface Properties; D014783:Viscosity
chemical_list: D001672:Biocompatible Materials; D005899:Glass Ionomer Cements; D011208:Powders; D019279:Resin Cements