Journal of Dental Research, Vol 69, 849-851, Copyright © 1990 by International & American Associations for Dental Research Online Journals
Monomer composition and bond strength of light-cured 4-META opaque resin
K. Yoshida, H. Matsumura and M. Atsuta
Department of Fixed Prosthodontics, Nagasaki University School of Dentistry, Japan.
A light-cured opaque resin was prepared with
4-(2-methacryloxyethoxycarbonyl) phthalic anhydride (4-META), bifunctional
methacrylates, and titanium dioxide (TiO2). The relation between monomer
composition and bond strength was examined with seven methacrylate
monomers. Methyl methacrylate (MMA) was useful as a solvent of 4-META.
However, it was not sufficiently cured by photo-initiator. The bond
strength of a triethyleneglycol dimethacrylate (TEGDMA)-based composition
was superior to other monomer-based compositions after repeated
thermocycles.
1,6-bis(methacryloxy-2-ethoxycarbonyl-amino)-2,4,4-trimethylhex ane (UDMA)
effectively provided viscosity to the composition. The prepared opaque
resin consisted of 4-META/MMA-TEGDMA primer, TEGDMA-UDMA-based monomer, and
titanium dioxide. This opaque resin bonded strongly to alumina-blasted
cobalt-chromium alloy. The light-cured 4-META opaque resin may be useful
for bonding prosthodontic composite to metal frameworks.
