Basic Porcelain Fused To Metal (PFM)
Porcelain fused metal dental crowns, or PFMs as they are commonly referred to, consist of a layer of metal alloy at the base topped by porcelain.
PFM crowns and bridges are widely used as the restorations offer strength, aesthetics, marginal integrity, predictability and excellent value for money.
A wide range of alloys are available to suit every possible case scenario. Hypersensitive or allergic patients can have the choice of Titanium, Nickel and Beryllium-free or noble or high-noble alloy copings(Gold).
Benefits
- High bond strength between metal and porcelain
- Strength for long-span bridges.
- Marginal integrity
- Biocompatible.
- Aesthetics.
- Ability to block out discoloured underlying tooth structure.
- Can incorporate precision attachments where clinically appropriate
- Currently used more sparingly for anterior teeth given that more aesthetic options are available
- Aesthetics (Inadequate tooth preparation can affect aesthetics)
- Long-term colour stability (become lighter over time)
- Exposure of restoration margins over time
- Metal sensitivity
