PFM
Porcelain Fused to Metal (PFM)
Porcelain-Fused-to-Metal (PFM) crowns are a common choice in modern dentistry, combining the strength of metal with the aesthetic appeal of porcelain. Let’s explore the key aspects of PFMs:
Composition
PFMs consist of two layers:
- Metal Core : The inner layer is made of a metal alloy (usually titanium or cobalt-chromium). This metal provides durability and strength.
- Porcelain Layer : The outer layer is a thin veneer of porcelain. It mimics the natural appearance of teeth.
Considerations:
- Aesthetics: While PFMs offer natural-looking results, the metal core may cause slight grayish discoloration at the gumline.
- Placement: PFMs are commonly used for back teeth (molars and premolars) due to their strength.
Benefits of PFMs:
- Durability and Strength:
- PFMs are known for their longevity. With proper care, they can last for many years.
- The metal core offers resistance to fracture and wear, making them suitable for molars that endure heavy biting forces.
- Aesthetic Appeal:
- The porcelain layer can be customized to match the color and translucency of adjacent natural teeth.
- PFMs blend seamlessly with the natural dental arch, enhancing smile aesthetics.
- Versatility:
- Besides crowns, PFMs are used for bridges, implant abutments, and other restorative needs.
- They adapt well to various clinical situations, including severe tooth decay and structural damage.
- Biocompatibility:
- The metals used in PFMs are generally biocompatible, posing a low risk of allergic reactions.
- They are well-tolerated by surrounding gum and mouth tissues.
- Functionality:
- PFMs restore effective chewing function and improve speech patterns.
- They provide a secure fit when cemented onto the tooth.
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