Abstract
The shear bond strength of the bonding agents, containing 2-succinoxyethyl methacrylate (2SEM) and three succinoxyethyl methacrylate derivatives (2SPrM, SPPM and Bis SGMA), to four polished dental alloys under dry and wet conditions was measured, in order to investigate the relationship between the chemical structure and the decrease of bond strength in water. The bond strength of most of bonding agents was higher than that of controls (BGDMA and acrylic resin) under dry conditions. The bond strength was reduced by immersion in water. The bond strength of most of bonding agents to nonprecious alloys under wet conditions was higher than that of the controls. The average bond strength of 100mol% 2SEM, 100mol% 2SPrM and 30mol% Bis SGMA bonding agents was superior to that of the others. The decrease in bond strength in water may be dependent upon the amount of water sorption of the bonding agents, as well as the magnitude of the stress at the resin-alloy interface. This interface stress may be altered by water sorption.
