Bond strengths of a porcelain material to different abutment substrates

The study evaluated the bond strength values of a single-unit all-porcelain material luted with an adhesive-resin cement to different abutment substra tes: amalgam, compomer, traditional glass ionomer cement, microhybrid resin composite, two resin composites for abutment buildup, gold, sandblasted go ld, dentin and enamel. Syntac enamel-dentin bonding system, in combination with IPS-Empress porcelain material, was used. After thermal cycling, the s amples were inserted into a Bencor jig device and sheared in a Controls tes ting machine. The statistical analysis of the differences between the bond strength values obtained was performed by ANOVA and the Student-Newman-Keul s multiple-comparison test. The type of failure at the interface was evalua ted using scanning electron microscopy. The type of failure, such as adhesi ve, cohesive and adhesive-cohesive, was correlated with bond strength value s. Enamel, dentin and the two resin composites for crown build-up showed th e highest bond strength values, while amalgam and gold samples showed the l owest.