Initially, porcelain fused to metal (PFMs) restorations were the clinician’s standard choice of material, because they offered reliable treatment outcomes for the patient.
However, the opaque porcelain used to mask the metal substructure, particularly in the cervical third, frequently causes a light gray appearance at the cervical margin. The effect can worsen after a few years if gingival recession occurs. Now, the demand for increased aesthetics and more cosmetically pleasing restorations has risen exponentially, corresponding with a significant fall in demand for PFMs. PFMs have been replaced with more clinically and aesthetically acceptable all-ceramic restorations, the most popular of which is zirconia.