Adhesive properties of modified glass-ionomer cements.
The incorporation of water-soluble polymers and/or vinyl monomers into glass-ionomer cements can yield toughened "hybrid cement-composites". This study compared a commercial water-hardening glass-ionomer cement and seven experimental hybrids in their bonding to both dentin and Silar composite. The cements were sanded and phosphoric-acid-etched or left with an unaltered matrix-formed surface when adhesion to composite was tested. The seven hybrids included: 15% 2-hydroxyethyl methacrylate (HEMA) with appropriate initiators/activators, 29% HEMA, 27% HEMA + 0.5% polyacrylic acid (PAA), 0.5% PAA, 1.5% PAA, 2.5% polyvinyl alcohol, and 2.5% gelatin. Acceptable bond strengths to applied composite and to dentin were observed for most of the modified hybrid cements. There were higher bond strengths with composite when the hybrids were left unetched. Bonding of some unetched, HEMA-containing cements achieved bond strengths (29% HEMA, 10.09 MPa) significantly higher than those of the unmodified cement (4.92 MPa). Resin-modified cements may promote better bonding by improved interaction and compatibility with the resin component of the composite.
Rusz
J E
JE
Naval Dental School, Bethesda, MD.
Antonucci
J M
JM
Eichmiller
F
F
Anderson
M H
MH
D000134:Acid Etching, Dental; D000180:Acrylic Resins / Q000737:chemistry; D000268:Adhesiveness; D000704:Analysis of Variance; D001585:Benzoyl Peroxide / Q000737:chemistry; D017438:Bisphenol A-Glycidyl Methacrylate; D003188:Composite Resins / Q000737:chemistry*; D001840:Dental Bonding / Q000379:methods*; D003804:Dentin; D005780:Gelatin / Q000737:chemistry; D005899:Glass Ionomer Cements / Q000737:chemistry*; D006801:Humans; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D011092:Polyethylene Glycols / Q000737:chemistry; D011109:Polymethacrylic Acids / Q000737:chemistry; D011142:Polyvinyl Alcohol / Q000737:chemistry; D012823:Silicate Cement / Q000737:chemistry; D013718:Tensile Strength; D014050:Toluene / Q000737:chemistry
D000180:Acrylic Resins; D003188:Composite Resins; D005899:Glass Ionomer Cements; D008689:Methacrylates; D011109:Polymethacrylic Acids; C054101:ChemFil II; D012823:Silicate Cement; C020946:triethylene glycol dimethacrylate; D014050:Toluene; D011092:Polyethylene Glycols; D017438:Bisphenol A-Glycidyl Methacrylate; C006903:carbopol 940; C005044:hydroxyethyl methacrylate; D005780:Gelatin; D011142:Polyvinyl Alcohol; D001585:Benzoyl Peroxide