Porcelain Fused to Metal (PFM) crown is a type of dental crown that combines the strength of metal with the aesthetics of porcelain. This dental restoration is commonly used to restore and enhance the appearance of a tooth that has been significantly damaged, decayed, or undergone root canal treatment.
Key Features of Porcelain Fused to Metal Crowns
Multiple factors of Porcelain Fused to Metal (PFM):
1). STRUCTURE
PFM crowns consist of two main components: Metal substructure and an outer layer of Porcelain.
2). METAL SUBSTRUCTURE
The underlying structure of the crown is made of a metal alloy, often containing a combination of metals like nickel, chromium, or cobalt. This metal provides durability and strength to withstand the forces of biting and chewing.
3). PORCELAIN OUTER LAYER
The metal substructure is covered with a layer of tooth-colored porcelain. This porcelain layer is carefully shaped and shaded to closely resemble the natural color and translucency of adjacent teeth.
4). AESTHETICS
The metal substructure gives PFM crowns strength and durability, making them suitable for use in posterior teeth (molars and premolars) where biting forces are greater.
5). STRENGTH AND DURABILITY
The porcelain outer layer makes PFM crowns more aesthetically pleasing compared to full-metal crowns. The color and appearance of the crown can be customized to match the patient's natural teeth.
6). VERSATILITY
PFM crowns are versatile and can be used for both front and back teeth. The choice of metal alloy may vary depending on the location of the tooth and specific requirements.
7). PREPARATION AND PLACEMENT
The process of getting a PFM crown typically involves two visits to the dentist. During the first visit, the tooth is prepared by removing the damaged or decayed portion, and an impression is taken. A temporary crown may be placed while the permanent crown is being fabricated. In the second visit, the permanent crown is cemented into place.
8). BIOCOMPATIBILITY
While the metal substructure may contain alloys that some individuals may be allergic to (such as nickel), advancements in materials have led to the development of more biocompatible options to reduce the risk of allergic reactions.
Benefits of PFM Crowns
NATURAL-LOOKING APPEARANCE:
PFM crowns can be made to look very natural, and they can be matched to the color of your other teeth. This makes them a good choice for teeth that are visible when you smile.
STRENGTH AND DURABILITY:
PFM crowns are very strong and durable, and they can withstand a lot of wear and tear. This makes them a good choice for teeth that are subjected to a lot of force, such as molars.
LONG LASTING:
PFM crowns can last for many years with proper care.
Cost of PFM Crowns:
PFM crowns are often more affordable than all-ceramic crowns but may be more expensive than full-metal crowns. The cost can vary based on factors such as the choice of metal alloy and the complexity of the restoration.