Have been used successfully over the past 60 years, they are very reliable
There are different dental alloys used to create PFMs
Non-precious
Semi-precious
High Noble
They are known to last for 30 years
They are incredibly strong, however, it is time consuming to create an esthetically pleasing crown or bridge due to the metal structure and multiple manufacturing steps required
The margins of PFMs may also be an issue as it can become exposed over time as gum tissue recedes
Zirconia
Zirconia offers a more esthetically pleasing solution while also providing high strength
The margins are extremely accurate, and gum recession will not affect esthetics
Can create the most life-like restorations
Very compatible for patients with allergies to certain metals that can be found in PFMs
