Just sandblast the inner surface of the crowns, ultrasonic wash and dry, and then apply PANAVIA 21. The paste of PANAVIA 21 bonds directly to base metal. There is no need to apply ED Primer to the metal surface. PANAVIA cements are self-adhering to metal and amalgam. On the other hand, in cases of semi or precious metals, you should apply Alloy Primer on the inside surface of the restoration. Do not use etching gel inside the restoration.
