Dental crowns serve as a versatile solution for a variety of dental issues ranging from cracked teeth to aesthetic improvements to restoring large cavities.
While several types of crowns are available, this article focuses specifically on Porcelain Fused to Metal (PFM) crowns. We'll explore why some might opt for this particular type, its composition, benefits, and potential drawbacks.
Quick Answer: What is a Porcelain Fused to Metal Crown?
A Porcelain Fused to Metal crown is essentially a hybrid between metal and porcelain crowns, offering both strength and aesthetic appeal. The base layer is a solid metal that is custom-made to fit your tooth, and the outer surface is a porcelain (tooth-colored) layer that is added to match the color and appearance of a natural tooth.
Keep reading to understand its makeup, advantages, disadvantages, and more.
Understanding Dental Crowns
A dental crown acts as a cap that encircles a tooth, providing structural support and improved aesthetics. Dentists often recommend crowns to protect a weak tooth, restore a damaged one, or cover discolored and misshapen teeth.
What is Porcelain Fused to Metal (PFM)?
Porcelain Fused to Metal crowns consist of a metal alloy base that provides strength, topped by a porcelain layer that gives a tooth-like appearance. These crowns are crafted using a blend of advanced dental technologies and traditional crown-making methods.
Advantages of PFM Crowns
PFM crowns come with several notable benefits:
Durability: These crowns are highly durable and can withstand chewing and biting for an extended period.
Aesthetics: The porcelain surface mimics the natural translucency of teeth, offering an appealing look.
Versatility: Because they are strong and aesthetically pleasing, they can be used for both front and back teeth.
Excellent fit: Unlike some of the newer crown milling technologies, a porcelain fused to metal crown is made of cast metal, and thus has a tight and intimate fit with the tooth it is cemented onto.
Drawbacks of PFM Crowns
However, they also have some limitations:
Cost: PFM crowns may be more expensive than some other types like all-metal or resin crowns.
Potential for Metal Allergies: Some individuals might experience allergic reactions to the metal base.
Aesthetic Limitations: While they look good, they may not offer the same level of natural appearance as all-ceramic crowns.
Risk of Porcelain Chipping: One common issue is that porcelain can chip when exposed to shearing forces. Though this won’t usually put the tooth’s health at risk, it can cause esthetic or comfort issues that necessitate replacement of the crown.
Alternatives to PFM Crowns
There are other options if PFM crowns don't suit your needs. These include all-metal crowns (known for their durability), all-ceramic crowns (celebrated for their aesthetics), and resin crowns (which are the most cost-effective).
Caring for Your PFM Crown
To extend the lifespan of your PFM crown, be sure to focus on the following:
Oral Hygiene: It's crucial to maintain good oral hygiene through regular brushing and flossing. Decay around the margins (edges) is a common cause of crown failure.
Regular Check-ups: Frequent dental exams can help in the early detection of issues and any necessary adjustments.
Final Thoughts
PFM crowns offer a balanced solution combining both strength and aesthetic appeal. However, they come with their own set of limitations such as higher costs and potential for porcelain chipping.
As always, consulting your dental professional is crucial to make an informed decision about the type of crown best suited to your needs.
FAQs
How long does a PFM crown last?
With proper care, a PFM crown can last many decades (sometimes an entire lifetime), but 10+ years is considered a “success.”
Is a PFM crown suitable for front teeth?
Yes, its aesthetic and durable features make it suitable for both front and back teeth.
Can I be allergic to my PFM crown?
While rare, allergic reactions to the metal base are possible.
* Though the author of this post is a licensed dentist in the state of Kansas, this information is provided for informational and educational purposes only. Please use your best judgment and contact emergency medical services in the event of an emergency.