This study was performed to find the most effective surface treatment for obtaining the maximum adhesion between Panavia-EX, a new adhesive resin cement, and three types of dental casting alloys. The surface treatments of metals:sandblasting, EZ-Oxisor (electrical etching) and Kura-Ace (Sn-electro deposition) were used separately or in combination. Tensile bond strength of the cement to the metals after treatment was determined.
Sandblasting considerably increased the strength with Ni-Cr alloy and 20 K gold alloy, but decreased it with Au-Ag-Pd alloy. Kura-Ace extremely increased the strength with all types of alloys tested. EZ-Oxisor proved to be ineffective for improving the bond.
When the new resin cement is usid, the following procedures are recommended. The surfaces of 20 K gold alloy and Au-Ag-Pd alloy should be treated with Kura-Ace before cementing. The surface of Ni-Cr alloy must be subjected to Kura-Ace after sandblasting.