If you’ve noticed your tooth is black after your crown has fallen off, you’re not alone. This issue can be concerning, but in most cases, it is nothing to worry about. It’s important to understand what could be causing this black discolouration and what you can do about it. In this article, we’ll break down the possible causes of a black tooth after a crown has fallen off, the potential risks, and the steps you should take to fix the problem.
What Is a Dental Crown?
A dental crown is a cap that fits over your tooth. It is used to protect a tooth that’s been weakened by decay, injury, or a root canal treatment. Crowns can be made from various materials, including porcelain, metal, or a combination of both. They help restore the strength, function, and appearance of the tooth. However, sometimes a crown may fall off, and this can reveal an underlying issue, like a blackened tooth.
Can Your Tooth Reject a Crown?
Why Is My Tooth Black After My Crown Fell Off?
There are several reasons why your tooth might appear black after a crown falls off. It could be due to natural discolouration or the result of an underlying dental issue. Let’s take a closer look at some of the most common causes.
1. Tooth Decay
One of the most common causes of a black tooth under a crown is tooth decay. Even though a crown covers the tooth, it doesn’t stop bacteria from reaching the tooth underneath. Over time, bacteria can cause decay, which may lead to discolouration. The black colour is often the result of severe decay.
If you notice that the blackness is accompanied by a soft or mushy feeling when you touch the tooth, it could be a sign of decay. In this case, it’s essential to see a dentist as soon as possible. Left untreated, decay can spread and cause more severe problems.
2. Root Canal Treatment
If your tooth had a root canal treatment before the crown was placed, it’s possible that the tooth may become discoloured over time. After a root canal, the blood supply to the tooth is removed, which can cause the tooth to darken. This process can take several years, and the discolouration may only become noticeable once the crown falls off.
While this discolouration is not harmful, it can affect the appearance of your smile. If you don’t mind the colour change, you may not need to do anything. However, if you’re concerned about the appearance, you may want to discuss whitening or other cosmetic options with your dentist.
3. Necrotic Tooth (Dead Tooth)
A dead tooth, or necrotic tooth, can also turn black under a crown. If the tooth’s pulp (the soft tissue inside the tooth) dies, it can cause the tooth to discolour. This often happens if the tooth was damaged and the nerve was removed, such as during a root canal procedure.
A necrotic tooth is not dangerous, but it can lead to infection if left untreated. If your tooth appears black and feels sensitive or painful, it’s important to visit a dentist to rule out any potential infections or complications.
4. Amalgam Staining
In some cases, the black discolouration might be caused by an old amalgam filling underneath the crown. Amalgam is a silver-coloured material used in fillings, but over time, it can cause the surrounding tooth structure to darken. If you had an amalgam filling before getting the crown, this might be the reason for the black tooth.
While amalgam staining is not harmful, it can make your tooth appear dark. If this is the case, your dentist might suggest replacing the crown to improve the appearance.
5. Intrinsic Staining
Intrinsic staining occurs when the stain develops inside the tooth, rather than on the surface. This type of staining can happen after a crown is placed, especially if the tooth has been treated for decay or a root canal. Intrinsic staining can cause the tooth to look darker or black.
This type of staining is difficult to remove with traditional teeth whitening methods. However, your dentist may suggest options like veneers or crowns to cover the stained tooth and restore its appearance.
What to Do If Your Tooth Is Black After Your Crown Falls Off
If your crown falls off and you notice a black tooth underneath, it’s important to take action right away. Here are some steps you can follow:
- Make an Appointment with Your Dentist
The first thing you should do is schedule an appointment with your dentist. Your dentist will examine the tooth and determine the cause of the discolouration. Depending on the cause, the dentist will recommend the appropriate treatment. - Re-cement the Crown
If the black tooth is caused by a root canal or amalgam staining, and there is no decay, your dentist may simply re-cement the crown. This will restore the function and appearance of your tooth. - Treat the Decay
If the blackness is caused by tooth decay, your dentist will need to remove the decay and place a new crown. In some cases, the tooth may need additional treatment, such as a filling or root canal, depending on the severity of the decay. - Consider Cosmetic Options
If the discolouration is cosmetic and not related to any serious dental issue, your dentist may offer options like whitening, veneers, or a new crown to improve the appearance of your tooth.
What is the Difference Between a Cap and a Crown?
How to Prevent Your Tooth from Turning Black Under a Crown
There are several steps you can take to prevent tooth discolouration under a crown:
- Brush and Floss Regularly: Good oral hygiene helps prevent decay and staining. Brush your teeth twice a day and floss daily to remove plaque and food particles.
- Attend Regular Dental Check-ups: Regular check-ups allow your dentist to spot any potential issues early and prevent problems like decay or infection.
- Avoid Hard Foods: Hard foods can put extra pressure on your crowns, which could lead to damage or dislodgement. Try to avoid hard or sticky foods that could loosen your crown.
- Use a Nightguard: If you grind your teeth at night, a nightguard can help protect your crowns and prevent unnecessary pressure.
Conclusion
A black tooth under a crown is usually a result of tooth decay, a previous root canal, or other dental issues. While it can be alarming, it is not always a sign of a serious problem. The best thing to do is see your dentist as soon as possible to determine the cause and explore treatment options. Taking good care of your teeth and attending regular dental check-ups can help prevent discolouration and keep your smile healthy.
Frequently Asked Question
Can a black tooth under a crown be fixed?
Yes, a black tooth under a crown can be fixed. Treatment depends on the cause. If it’s due to decay, your dentist will remove the decay and place a new crown. If it’s from a root canal or staining, the crown may just be re-cemented or replaced.
Will my crown stay on if my tooth is black underneath?
It depends on the underlying issue. If your tooth is decayed, the crown might not stay securely on until the decay is treated. If it’s simply discoloured due to a root canal or staining, re-cementing the crown can often restore it without further issues.
How long can I wait before seeing a dentist if my crown fell off?
It’s best to see a dentist as soon as possible if your crown falls off. Delaying treatment can lead to tooth movement, making it harder for the crown to fit properly. Additionally, exposed teeth are more vulnerable to further decay or damage without the crown in place.
Can I clean a black tooth under a crown myself?
While good oral hygiene is important, you should avoid trying to clean a black tooth under a crown on your own. If decay or infection is present, it requires professional treatment. Regular brushing and flossing can help prevent further issues, but only a dentist can address the cause of discolouration.
How can I prevent a tooth from turning black under a crown?
To prevent discolouration, practice good oral hygiene by brushing and flossing regularly. Avoid hard or sticky foods that could damage the crown. Wear a nightguard if you grind your teeth. Regular dental check-ups can also help spot early signs of decay or other issues before they worsen.
