Can You Undergo Orthodontics After Root Canal Treatment? - Dentistry

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Can orthodontic treatment be performed after root canal therapy?


Hello, Doctor.
Recently, I've been experiencing pain in my lower left tooth (radiating to the gums).
After visiting the dentist, I was told that it's a cavity in my third molar.
However, tapping on it doesn't cause pain; instead, tapping on the first molar does.
The dentist first filled the third molar and mentioned that if the tooth still hurts, I would need a root canal.
I would like to ask:
1.
Why does tapping on the decayed tooth not cause pain, while another tooth does? Could the first molar also have an issue? (Sometimes, the first and second molars also hurt.)
2.
I read that after a root canal, a temporary crown is placed before orthodontic treatment.
If I don’t plan to start orthodontics (traditional or Invisalign) immediately after the root canal, will I still use a temporary crown, or will it be a porcelain crown, and then switch to a temporary crown when I start orthodontics?
3.
I have a small question...
Isn't a root canal meant to stabilize the tooth in its position? Is it possible to move a tooth that has been stabilized through orthodontics?
Thank you, Doctor! I appreciate your help.

Zhenzhen, 20~29 year old female. Ask Date: 2021/11/21

Dr. Lin Jiayong reply Dentistry


Hello: 1.
An X-ray is required to diagnose whether the first molar also has lesions.
2.
If the tooth undergoing root canal treatment has intact dental structure, a temporary crown is not necessary.
3.
Yes, if the surrounding tissues of the tooth are healthy, orthodontic treatment can proceed.
Sincerely, Lin Chia-Yung, Department of Dentistry, Taichung Hospital, Ministry of Health and Welfare.

Reply Date: 2021/11/21

More Info


When considering orthodontic treatment after root canal therapy, there are several important factors to take into account. Your situation, where you are experiencing pain in your teeth, particularly with the third molar (wisdom tooth) and the first molar, raises some pertinent questions. Let's address your concerns step by step.

1. Pain Response in Teeth: The phenomenon of experiencing pain in one tooth while another seemingly affected tooth does not respond to percussion can be perplexing. The reason you might not feel pain when tapping on the third molar (the one that has decay) could be due to several factors. It’s possible that the decay has not yet reached the nerve of that tooth, or the nerve may be dead or in a state of necrosis, which can happen with deep cavities. On the other hand, the first molar may have a different issue, such as pulpitis or an abscess, which could explain the pain when you tap on it. It’s crucial to have both teeth evaluated thoroughly, as untreated issues can lead to more significant problems down the line.

2. Temporary vs. Permanent Crowns After Root Canal Treatment: After a root canal, it is generally recommended to place a crown on the treated tooth to protect it from fracture and restore its function. If you are not planning to undergo orthodontic treatment immediately after the root canal, your dentist may suggest placing a temporary crown initially. This temporary crown can protect the tooth while you decide on your orthodontic plan. If you plan to start orthodontic treatment later, your orthodontist will typically work with your dentist to determine the best timing for placing a permanent crown. In some cases, a full porcelain crown may be placed initially, but it’s essential to discuss this with your dental care team to ensure it aligns with your orthodontic goals.

3. Orthodontics and Fixed Teeth: You are correct in thinking that root canal treatment stabilizes a tooth by removing the nerve and cleaning out the canal. However, orthodontics can still move teeth that have undergone root canal therapy. The roots of the teeth are anchored in the bone, and orthodontic treatment involves applying controlled forces to the teeth, which can cause them to move within the bone. This movement is achieved through the use of braces or clear aligners, which exert pressure on the teeth over time. The key is that the tooth must be healthy and stable enough to withstand the forces applied during orthodontic treatment. Your orthodontist will assess the condition of your root canal-treated teeth to ensure they are suitable for movement.

In summary, it is indeed possible to undergo orthodontic treatment after root canal therapy, but careful planning and collaboration between your dentist and orthodontist are essential. If you have any lingering pain or concerns about your teeth, it is crucial to address these issues before starting orthodontic treatment. This will ensure that your teeth are healthy and ready for the adjustments that orthodontics will bring. Always feel free to seek a second opinion if you feel uncertain about the treatment plan proposed by your dental care provider. Your oral health is paramount, and understanding your treatment options will empower you to make informed decisions.

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