Moisture susceptibility of resin-modified glass-ionomer materials.
The purposes of this experiment were to determine if resin-modified glass-ionomer cements are less sensitive to moisture than are conventional glass-ionomer cements, to investigate the effects of barrier coatings, and to study the effects of different setting environments. Discoid specimens of a variety of resin-modified glass-ionomer materials and a conventional glass-ionomer cement control were stored in different environments and were protected with different barrier coatings. The diametral tensile strengths of the specimens were determined and analyzed with three-way analysis of variance. Resin-modified glass-ionomer cements are less sensitive to moisture than is the conventional glass-ionomer cement control. Drier environments produced stronger resin-modified glass-ionomer specimens. Use of a fissure sealant as a barrier coating increased overall specimen strength, and the individual materials differed in strength.
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Department of Pediatric Dentistry, University of Southern California, School of Dentistry, Los Angeles, California, USA.
Kopel
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White
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D000042:Absorption; D000180:Acrylic Resins / Q000737:chemistry; D000704:Analysis of Variance; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry; D004356:Drug Storage; D005899:Glass Ionomer Cements / Q000737:chemistry*; D016018:Least-Squares Analysis; D008422:Materials Testing; D010895:Pit and Fissure Sealants; D012117:Resins, Synthetic / Q000737:chemistry; D013718:Tensile Strength; D014867:Water
D000180:Acrylic Resins; D003188:Composite Resins; C079765:Fuji II LC cement; C074933:Geristore; D005899:Glass Ionomer Cements; D010895:Pit and Fissure Sealants; D012117:Resins, Synthetic; C081982:VariGlass VLC; D014867:Water; C061499:Ketac-Bond; C067790:Vitrabond; D017438:Bisphenol A-Glycidyl Methacrylate