Abstract
The experimental adhesive resins consisted of MMA, 4-META, PMMA, TBB-O (: same as Superbond C&B), and their tensile adhesive strengths to ceramics were investigated with and without silane coupling agents in comparison with Panavia-EX. As adherend, porcelain for metal-ceramics VITA VMK68 dentin, opaque and one of dental implants BIOCERAM (; single crystal of alumina, Kyocera Corp.) were used. Experimental resin and Panavia-EX adhered a little to those adherend. And expermental resin with 1% silane coupling agent showed higher adhesive strength to ceramics than the experimental resin without silane. But any adhesives was not considered to have enough stability for longterm Clinical application, because of the lack of endurance of tensile adhesive strength after long period water immersion. The experimental resin with 1% of silane coupling agent revealed the excellent adhesion to BIOCERAM (its adhesive strength was nearly 200kgf/cm2 after 1 month water immersion period). On the other hand, the tendency to failure of porcelains, whcih were adherend, was examined. Panavia-EX was apt to cause adherend-failure. But in the experimental resins such a phenomenon was not observed.
