Abstract
The aim of this study was to obtain stable adhesive durability of facing resins to dental metal. The effect of differences in the coefficient of thermal expansion between facing resins and dental metals on adhesive durability was examined. Ag-Pd-Au alloy (AgPd) was treated with primer or electrodeposition with 4-MET and bonded with Estenia (ES), having an approximate value of coefficient of thermal expansion compared with that of AgPd. In the other case, AgPd was bonded with Gradia (GR), having a larger value of coefficient of thermal expansion in comparison with AgPd. Following that, shear bond strength was measured after the thermal cycle test and the adhesive durability was estimated. The adhesive durability of ES was found to be superior to that of GR and both the shear bond strength and adhesive durability after treatment by electrodeposition with 4-MET were superior to those after primer treatment.
