Persistent Discomfort After Root Canal Treatment: What to Do Next? - Dentistry

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Discomfort years after root canal treatment?


Hello, Doctor.
Last year, I visited a nearby dental clinic due to pain in my teeth and cheek.
I felt discomfort in my upper right molar, which had undergone root canal treatment about 15 years ago and had a post and crown placed.
The dentist at the clinic said there was no issue.
However, I found online that it could be sinusitis, so I went to the hospital for X-rays and a CT scan, which confirmed sinusitis.
I then underwent endoscopic surgery.
However, for the past six months post-surgery, I have been diligently rinsing my sinuses and using nasal allergy spray, but I still feel uncomfortable.
An ENT specialist reviewed my X-rays and said my sinuses were fine.
Recently, my tooth discomfort has returned, and I consulted a family dentist at a large hospital.
After examining the X-rays, he concluded that my teeth were fine and performed a pulp vitality test, which showed no sensation in the molar.
Yet, I still feel a dull discomfort in my tooth.
Should I seek a consultation with an endodontist for further evaluation?

Liu, 30~39 year old female. Ask Date: 2022/09/12

Dr. Lin Jiayong reply Dentistry


Hello: It is recommended to consult with the nearest medical center, specifically the Department of Endodontics or Oral Surgery, as it involves the sinuses, and it is essential to proceed with caution!

Reply Date: 2022/09/12

More Info


Persistent discomfort after root canal treatment can be quite distressing, especially when previous dental evaluations suggest that the tooth itself is not the source of the problem. Given your history of root canal treatment, the presence of a dental crown, and the recent sinus issues, it is understandable that you are seeking clarity on the next steps.

First, it’s important to recognize that discomfort following root canal therapy can occur for several reasons. One possibility is that the root canal treatment was not completely successful, which can happen if there are complexities in the tooth's anatomy, such as additional canals or variations in the shape of the existing canals that were not adequately treated. In such cases, bacteria can remain, leading to persistent inflammation and discomfort.

Another consideration is the possibility of referred pain. Since you mentioned having sinus issues, it’s plausible that the discomfort in your upper molar could be related to sinus pressure or inflammation, especially if the roots of the upper molars are close to the sinus cavity. This can sometimes lead to a sensation of tooth pain, even when the tooth itself is healthy. However, since you have undergone surgery for your sinus issues and have been following up with an ENT specialist, it seems that this avenue has been explored.

Given that your recent dental evaluations, including X-rays and nerve tests, did not reveal any issues with the tooth, it may be beneficial to consult with an endodontist, a specialist in root canal treatments. An endodontist can provide a more detailed examination and may utilize advanced imaging techniques to identify any underlying issues that may have been missed. They can also assess the condition of the root canal filling and determine if any further treatment is necessary, such as retreatment of the root canal or even surgical options like an apicoectomy if there is an infection at the root tip.

In addition to seeking a second opinion from an endodontist, consider discussing your symptoms in detail with your dentist or specialist. It’s important to communicate the nature of your discomfort—whether it’s sharp, dull, throbbing, or constant—as this can help in diagnosing the issue. You might also want to explore other potential causes of your discomfort, such as bruxism (teeth grinding), which can lead to tooth sensitivity and discomfort, or even issues related to the dental crown itself, such as improper fit or material sensitivity.

In the meantime, managing discomfort can involve over-the-counter pain relief medications, warm saltwater rinses, or topical analgesics. However, these are temporary solutions and should not replace a thorough evaluation by a dental professional.

In summary, while your recent evaluations have not indicated a problem with the tooth itself, the persistence of your discomfort warrants further investigation. Consulting with an endodontist could provide you with the answers you need and help determine the best course of action to alleviate your symptoms. Remember, it’s crucial to advocate for your health and seek out the care that addresses your concerns comprehensively.

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