Journal of Dental Research, Vol 68, 813-818, Copyright © 1989 by International & American Associations for Dental Research Online Journals
A new porcelain repair system with a silane coupler, ferric chloride, and adhesive opaque resin
H. Matsumura, M. Kawahara, T. Tanaka and M. Atsuta
Department of Fixed Prosthodontics, Nagasaki University School of Dentistry, Japan.
A new porcelain repair system was developed which uses a two-liquid primer,
self-cured opaque resin, and light-cured composite. The primer consisted of
two liquids. One component was 4% 3-trimethoxysilylpropyl methacrylate in
methyl methacrylate, and the other component was 0.5% ferric chloride in
ethanol. A self-curing opaque resin, 4-META/MMA-TBB opaque resin, was used
as an adhesive to bind the porcelain and the composite. Adhesive opaque
resin was applied on the roughened and primed porcelain. Light-cured
composite was placed over the 4-META opaque layer. A shear test was
performed for investigation of the strength and durability of the bonding.
The result was that for all specimens after 20,000 thermocycles, fracture
or crack propagation during the shear test occurred in the porcelain,
rather than in the bond. This system may be used to repair fractured
porcelain facings without removal of prostheses.
