Embrasures should be as clear of excess resin as possible. Now place pressure on the restoration with your finger or an appropriate instrument. Polish with disks, cups, points, diamond polishing pastes and aluminum oxide polishing pastes for the final luster. The internal surface of PFM,s can be of several types. Sandblast the surfaces of all metal crowns, no matter the type of metal.
Tin plating improves the chemical adhesion of all metal crowns, particularly precious metal.
However, tin plating sometimes causes discoloration of the entire tooth structure being covered. You are now ready to proceed. Leave for no more than 15 seconds on the dentin and not more than 30 seconds on the enamel. Wash off for not less than 15 seconds. Dry very gently, do not dessicate the tooth surface.