Pain After Root Canal Treatment and Crown Placement - Dentistry

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Pain after crown placement following root canal treatment?


Hello, doctor! Recently, after undergoing root canal treatment and having a crown and post placed, I have been experiencing pain while eating.
I also feel pain when biting down, even with normal pressure.
Could this be due to incomplete root canal treatment or another issue? If it is incomplete root canal treatment, will I need to remove the crown to undergo retreatment?

Eason, 20~29 year old female. Ask Date: 2016/01/13

Dr. Zeng Guanghui reply Dentistry


The above situation may be due to inflammation at the root apex after root canal treatment, or there may be a crack in the root itself.
It is also possible that the dental crown is exerting pressure on the gum tissue at its margins, or that the occlusal height of the crown is too high.
It is recommended to consult a dentist for further examination and treatment.

Reply Date: 2016/01/13

More Info


After undergoing root canal treatment and having a crown placed, experiencing pain while eating or during normal biting can be concerning. It’s essential to understand that some discomfort is expected after such procedures, but persistent or severe pain may indicate underlying issues that need to be addressed.

Firstly, it’s important to recognize that root canal treatment involves cleaning and disinfecting the interior of the tooth, followed by sealing it to prevent reinfection. After this procedure, the tooth may be sensitive for a few days to a week as the tissues heal. However, if the pain persists beyond this period or intensifies, it could suggest that the root canal treatment was not entirely successful. This might be due to several factors, including:
1. Incomplete Cleaning: Sometimes, the root canals can have complex anatomy that is difficult to clean thoroughly. If any infected tissue remains, it can lead to ongoing pain and discomfort.

2. Reinfection: If bacteria manage to re-enter the tooth after the procedure, it can cause reinfection, leading to pain and inflammation.

3. Crown Fit Issues: If the crown is not properly fitted, it can alter your bite, causing discomfort when chewing. This misalignment can lead to pain in the tooth as well as in the surrounding muscles and joints.

4. Periapical Inflammation: Inflammation at the tip of the root (periapical area) can occur if the infection was not fully resolved during the initial treatment. This can lead to pain that may feel like it’s coming from the tooth itself.

5. Other Dental Issues: Sometimes, pain can be referred from other dental problems, such as gum disease or issues with adjacent teeth.

Given these possibilities, it’s crucial to follow up with your dentist. They may recommend taking X-rays to evaluate the status of the root canal and the surrounding bone. If there is evidence of infection or if the root canal was not adequately completed, retreatment may be necessary. This could involve removing the crown, cleaning the canals again, and resealing the tooth.

In the meantime, managing pain can be done through over-the-counter pain relievers like ibuprofen or acetaminophen, as directed. Applying a cold compress to the outside of your cheek can also help reduce swelling and discomfort. However, if the pain is severe or accompanied by swelling, fever, or drainage, it’s essential to seek immediate dental care.

In summary, while some discomfort is normal after root canal treatment and crown placement, persistent pain should not be ignored. It’s vital to communicate openly with your dentist about your symptoms, as they can provide the necessary evaluations and treatments to ensure your dental health is restored.

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