Glyceryl Methacrylate Asa Dentin Primer

The eMcacy of pretreatment on the dentin surface with an aqueous solution of glycery1 methacrylate {GM) was examined by measuring the wall-to-wall polymerization centraction of a light activated composite in a cylindrical dentin cavity, and by measuring the tensile bondi strength to a flat dentin surface. All of the tested dentin surfaces were cleaned with neutralized O.5M EDTA and treated with experimental primers, followed by a marketed dentin bonding agent and composite. The contraction gap forination of the composite was completely prevented by the application of the GM solution at concentrations of 25 and 35% in water. In contrast, half of the specimens treated with 35% HEMA and 35% HEMA containing 5% glutaraldehyde showed gap forrnation, Furthermore, a considerably high tensile bond strength of more than 18MPa was observecl in the above described entin bonding system.