Contraindicated when the patient has a metal allergy or when the size of the tooth pulp is negligibly smaller thus compromising the tooth preparation process. It is also contraindicated when the clinical tooth crown is very short and lacks the required stability including retention that is enough to provide the space for porcelain and metal.

The ideal preparation for PFMs is a chamfer margin preparation. If a porcelain labial margin is prescribed, then a shoulder margin preparation is required.

Feather-edge margin preparations are indicated for full-cast restorations.

Panavia 21 – tin plated

Glass ionomer cement (GC Fuji, GC America)

Zinc Phosphate Polycarboxylate

Resin Ionomer cement (RelyX, 3M ESPE)

 

If an adjustment is required on the ceramic, use a fine diamond with water and air to keep the crown cool. To contour the ceramic, polish with a pink rubber wheel and diamond polishing paste (Brasseler, Shofu, Vident).

D2750 Crown Porcelain fused to high noble

D2751 Crown Porcelain fused to non-precious

D2752 Crown Porcelain fused to semi-precious

D6750 Crown Porcelain fused to high noble (bridge units)

D6751 Crown Porcelain fused to non-precious (bridge units)

D6752 Crown Porcelain fused to semi-precious (bridge units)