Abstract
4-(3-Methacryloyloxypropoxycarbonyl)phthalic anhydride (MPRPA), 4-(4-Methacryloyloxybutoxycarbonyl)phthalic anhydride (MBPA), 4-(2-Methacryloyloxyethoxycarbonyl)phthalic anhydride (4-META) and 2-Benzoyloxyethyl methacrylate (BEMA) were synthesised and MMA-TBB type adhesives containing these monomers were prepared. Adhesive strength of these adhesives to the 5 kinds of dental alloys polished by emery paper was measured after a 2, 000-time thermal cycle test. Adhesive with MBPA showed the best adhesion to the alloys of all adhesives.
Adhesive strength was provided by cohesive failure area of the fracture surface in case of adhesion of alloys by MMA-TBB type resins. A 50 μm-thickness of adhesive showed better adhesive strength than that of 150 μm, and adhesive strength was increased by heating the adhered samples for 1 hour at 60℃.
