Dental Issues: Root Canal Treatment vs. Extraction for Upper Molars - Dentistry

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Recently, I have experienced swelling and pain when biting down on my upper second premolar prosthesis (which has been in use for 10 years).
There is also pain when pressing on the buccal gingiva.
An X-ray shows a shadow between the prosthesis and the molar.
The dentist has suggested either a second root canal treatment or extraction of the tooth root for orthodontic correction, as the positioning of the prosthesis is not ideal and is tilted towards the tongue.
I have a few questions: 1.
Was the first root canal treatment not done properly? 2.
Could it be that bacteria from decay have caused inflammation over time? 3.
Is it a periodontal issue? Periodontal disease? Is the problem related to the tooth or the gums? 4.
Is a second root canal treatment advisable? I understand there is a risk of failure.
5.
Could there be other underlying issues? I am 37 years old and do not intend to pursue orthodontic treatment.
Thank you, doctor.
Here are the links to the X-ray images: https://drive.google.com/file/d/1kn1_yVt7LdGehh28PQLj4q3ZpHjs8i_d/view?usp=drive_link https://drive.google.com/file/d/1WyYl_PYtwmYbpWi1yzgxiKWkjO-9RsPT/view?usp=sharing

JEFF, 30~39 year old female. Ask Date: 2023/11/02

Dr. Lin Jiayong reply Dentistry


Hello: 1/2 It is suggested to change your perspective.
The originally problematic tooth has been preserved for an additional 10 years due to root canal treatment and the protection of a crown.
3/4 If you want to confirm the success rate of a second root canal, it is advisable to obtain a dental cone beam computed tomography (CBCT) scan.
If you do not wish to undergo orthodontic treatment, you can directly inform your dentist.
If there is no discomfort, continuous observation is also an option.
You may also consider consulting a specialist in endodontics at a medical center for a second opinion.

Reply Date: 2023/11/02

More Info


When it comes to dental issues, particularly concerning root canal treatments and the potential need for extraction, there are several factors to consider. Based on your description, it seems you are experiencing pain and discomfort in your upper second premolar, which has a history of being treated with a dental prosthesis for about ten years. The presence of shadows on the X-ray suggests possible complications that could stem from various sources, including the initial root canal treatment, bacterial infection, or periodontal disease.

1. Initial Root Canal Treatment: It is possible that the initial root canal treatment was not entirely successful. Root canals can sometimes leave behind infected tissue or fail to adequately seal the canal, allowing bacteria to persist and cause reinfection. This could lead to the symptoms you are experiencing, such as pain when pressure is applied to the gums.

2. Bacterial Infection: Over time, bacteria can infiltrate the tooth structure, especially if there are any cracks or if the crown or filling has deteriorated. This can lead to secondary infections, which may manifest as pain and swelling. If the tooth has been compromised, it may require retreatment to eliminate the infection.

3. Periodontal Disease: Another possibility is that you may be experiencing periodontal disease, which affects the gums and the supporting structures of the teeth. This condition can lead to gum inflammation, pain, and even tooth mobility if left untreated. If the periodontal disease is significant, it could necessitate more extensive treatment, including potential extraction.

4. Retreatment Considerations: The suggestion for a second root canal treatment (retreatment) is a common approach when there is evidence of reinfection. However, it is essential to understand that retreatment does carry a risk of failure, and the success rates can vary depending on the complexity of the case and the condition of the tooth. Factors such as the anatomy of the root canals and the presence of any additional complications will influence the outcome.

5. Extraction vs. Retreatment: If the tooth is deemed non-restorable or if the prognosis after retreatment is poor, extraction may be the best option. This is especially true if the tooth is causing significant pain or if there is a risk of further complications. Additionally, if you are considering orthodontic treatment in the future, extracting the tooth may provide better alignment options.

Given your age and the fact that you are not currently considering orthodontic treatment, it is crucial to weigh the benefits and risks of both options. If you choose to pursue retreatment, ensure that you have a thorough discussion with your dentist about the procedure, potential outcomes, and any alternative treatments available.

In conclusion, the decision between retreatment and extraction should be made based on a comprehensive evaluation of your dental health, the condition of the tooth, and your personal preferences. Consulting with a specialist in endodontics or periodontics may provide additional insights and help you make an informed decision. It is also advisable to seek a second opinion if you feel uncertain about the proposed treatment plan.

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