Can Cracked Metal-Ceramic Crowns Be Repaired or Need Replacement?

Q: Can Cracked Metal-Ceramic Crowns Be Repaired or Need Replacement?

Hello： When considering porcelain fractures, two issues need to be addressed. <br>First, excessive occlusal forces can lead to cracks; identifying and alleviating the underlying cause is essential to prevent future porcelain fractures. <br>Common causes include a tendency to chew

Metal-ceramic crown fracture?

Hello, Doctor.
I have the following questions I would like to ask, thank you.
1.
My fixed dental prosthesis is a metal-ceramic crown, but shortly after it was completed, a small hole appeared, revealing the metal underneath.
Can this type of dental prosthesis be repaired, or does it need to be redone?
2.
The small hole seems to have gotten larger over the past year, exposing more of the metal.
In this case of a fracture, will the hole continue to grow larger over time?
3.
If left untreated, aside from being less aesthetically pleasing, what other effects might there be? Can I wait until half of the porcelain is broken before addressing this dental prosthesis?
Thank you very much for your response to these questions.

Ms. Chen, 20~29 year old female. Ask Date: 2023/08/22

Dr. Lin Jiayong reply Dentistry

Hello: When considering porcelain fractures, two issues need to be addressed.
First, excessive occlusal forces can lead to cracks; identifying and alleviating the underlying cause is essential to prevent future porcelain fractures.
Common causes include a tendency to chew hard objects, bruxism (teeth grinding), clenching due to stress, or unstable occlusion on both sides.
Secondly, if aesthetics are a concern, one might consider switching to all-ceramic crowns to avoid metal exposure after a fracture!

Reply Date: 2023/08/22

More Info

When it comes to cracked metal-ceramic crowns, there are several important considerations to keep in mind regarding repair and replacement.
1. Can Cracked Metal-Ceramic Crowns Be Repaired?
Unfortunately, once a metal-ceramic crown has developed a crack, it is generally not possible to repair it effectively. Metal-ceramic crowns are typically constructed as a single unit, and any damage to the porcelain layer or the metal substructure compromises the integrity of the crown. In most cases, the best course of action is to replace the crown entirely. This is because attempting to repair a cracked crown may not yield satisfactory results, and the repaired area could be weaker than the original structure, leading to further issues down the line.

2. Will the Crack Worsen Over Time?
Yes, it is likely that the crack will continue to grow larger over time, especially if the crown is subjected to normal chewing forces. The porcelain layer is not only aesthetic but also serves to protect the underlying metal. As the porcelain cracks and chips away, more of the metal will be exposed, which can lead to further deterioration of the crown. Additionally, the exposed metal can lead to aesthetic concerns, as it may become more visible and detract from the overall appearance of your smile.

3. What Are the Consequences of Not Addressing the Issue?
If left untreated, a cracked crown can lead to several complications beyond just cosmetic concerns. The exposed metal can accumulate plaque and bacteria, increasing the risk of decay or gum disease in the surrounding teeth and gums. Furthermore, the structural integrity of the crown is compromised, which may lead to further fractures or even complete failure of the crown. If the crown fails, it may necessitate more extensive dental work, including potential root canal treatment if the underlying tooth becomes compromised.

4. Can I Wait Until the Crown is More Damaged to Address It?
While it may be tempting to wait until the crown is more damaged before seeking treatment, this is not advisable. The longer you wait, the greater the risk of complications, including potential damage to the underlying tooth structure. It is always best to address dental issues sooner rather than later to avoid more extensive and costly treatments in the future.

In summary, if you have a cracked metal-ceramic crown, it is advisable to consult with your dentist as soon as possible to discuss replacement options. They can provide you with a thorough examination and recommend the best course of action based on the current state of your dental health. Additionally, if you are considering alternatives, such as all-ceramic crowns or other materials, your dentist can help you weigh the pros and cons based on your specific needs and preferences. Remember, maintaining your dental health is crucial, and addressing issues promptly can save you time, money, and discomfort in the long run.

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