What is a Porcelain Fused to Metal Crown?
Porcelain fused to metal (PFM) crowns are a popular type of dental crown that combines the durability of metal with the aesthetics of porcelain. They are commonly used to restore damaged teeth or teeth that have been treated with root canal therapy. In this blog post, we will explore the benefits and drawbacks of PFM crowns, how they are made, and how to care for them.
Benefits of Porcelain Fused to Metal Crowns
One of the primary benefits of PFM crowns is their strength and durability. The metal substructure provides a strong foundation for the porcelain, which is bonded to the metal using high-heat firing techniques. This makes PFM crowns less prone to fractures or chipping than all-porcelain crowns.
Another advantage of PFM crowns is their ability to mimic the natural shade and translucency of a patient's teeth. This makes them a great choice for restoring front teeth that are visible when smiling, as well as for teeth in the back of the mouth that require added strength due to grinding or clenching.
Drawbacks of Porcelain Fused to Metal Crowns
While PFM crowns have many advantages, they do have some drawbacks to consider. One common issue with PFM crowns is the appearance of a dark line at the gum line, which is caused by the metal substructure showing through the translucent porcelain. This can be a concern for patients who want a completely natural-looking restoration.
Additionally, some patients may experience sensitivity to hot or cold temperatures due to the metal component of the crown. This is because metals conduct temperatures more readily than porcelain. Some patients may also have an allergic reaction to the metal used in their PFM crown, which could result in discomfort or irritation.
How much does a PFM crown cost?
The price of a PFM crown is around $1,000 and $1,500 in the US.
However, in the case of porcelain fused to metal crowns an additional reason for the price difference is the metal in the crown.
Your best bet is to buy a crown that is fused to gold. This is considered to be the highest quality, even though this is the most expensive option.
As always, there can be huge differences in prices depending on your location, size of the crown, and the experience of the dentists.
Here is a rough estimate of PFM crown prices in various countries:
- United States: $1,000 – $1,500
- United Kingdom: £400 – £500
- Canada: $1,000 – $1,200
- Australia: $1,100 – $1,300
How are Porcelain Fused to Metal Crowns Made?
The process of making a PFM crown typically involves two visits to the dentist. At the first visit, the dentist will prepare the tooth by removing any decay or damaged tissue and shaping it to fit the crown. An impression of the prepared tooth is then taken, which is sent to a dental laboratory.
At the lab, a dental technician will create the metal substructure of the crown using gold, or a high-strength metal alloy such as cobalt-chromium or nickel-chromium. The porcelain is then carefully added to the metal substructure, layer by layer, and fired at a high temperature to create a strong bond.
Once the crown is complete, it is sent back to the dentist for final adjustments and placement. The dentist will check the fit and color of the crown to ensure it blends in with the patient's natural teeth before permanently bonding it in place.
Caring for Porcelain Fused to Metal Crowns
To ensure the longest lifespan for your newly placed PFM crown, it is important to practice good oral hygiene habits. This includes brushing twice a day with a soft-bristled brush and fluoride toothpaste, flossing daily, and visiting the dentist regularly for cleanings and checkups.
It is also important to avoid chewing on hard or crunchy foods, such as ice, hard candies, or popcorn kernels, as these can cause damage to the crown over time. Additionally, patients should avoid using their teeth as tools, such as opening packages or biting their nails, as this can also lead to damage.
In conclusion, PFM crowns offer many benefits for patients who want a strong and natural-looking restoration. However, they do have some drawbacks to consider, including the appearance of a dark line at the gum line and the potential for sensitivity or irritation. By practicing good oral hygiene habits and avoiding damaging habits, patients can enjoy their PFM crowns for years to come.