PFM crown is one of the crown types tremendously changed the era of teeth crowning to transfer it from being un esthetic metallic to esthetic and same tooth like.
PFM is being used now for the past 60 years and definitely proved to be durable and standing oral environment
PFM what is it made of?
As the name employs there are two parts, the porcelain part and metal (Alloy) part and based on the alloy precious metal content we categorize crowns in:
Non-Precious: Nobel metal content is less than 25%.
Semiprecious: Nobel metal content is 25%.
Precious: Nobel metal content 60% and above.
The Nobel metal can be white gold, platinum or Palladium and the non-precious part can be Nickel, Chromium or Cobalt.
Advantages of PFM:
- Strong, reliable and durable.
- Has been known for over 60 years.
- Can be used for single or even multiple units bridge with no consideration to length span.
Disadvantages of PFM:
- Aesthetics is still an issue specially for non-standard shades.
- Lakes the translucency due to presence of metal underneath.
- Metal margin (black or gray) at the gum line.