Oral Mucosal Swelling After Root Canal Treatment - Dentistry

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There is a mass on the buccal mucosa?


Hello doctor, I had my third tooth from the bottom left extracted seven years ago and had three crowns placed.
Last week, I experienced severe tooth sensitivity and went to see the dentist, only to find out that one of the crowns had come loose and caused the second-to-last tooth to decay.
The dentist performed a root canal treatment and administered several injections.
He temporarily placed my original crown back on and scheduled a follow-up appointment.

Five days after returning home, I noticed a swelling on the left side of the gum of the tooth that underwent root canal treatment, about 1 cm from the gum line.
There is a small lump (approximately 0.5 cm) that can only be felt by pressing with my thumb on the outside and my index finger on the inside.
It is not visible when I look in my mouth, and it is movable.
Pressing on it does not cause pain.
I am unsure if this is a result of the root canal treatment or if it has been there for a long time.
I am very worried that it might be something serious, so I immediately went back to the dentist for an examination.
The dentist said it is not a lymph node because it is too small and mentioned that something serious would typically be painful when pressed and would be fixed in place.
I asked him what to do if it doesn't go away, and he said we would plan further if it doesn't resolve.
I am really anxious about this.
What should I do?

Liang Xiansheng, 30~39 year old female. Ask Date: 2006/05/16

Dr. Wu Jinjun reply Dentistry


Hello: If you have recently noticed the appearance of a lump, it may be related to the tooth that underwent root canal treatment.
It should disappear after the treatment is completed; if it does not, a thorough examination is necessary to determine the underlying issue.

Reply Date: 2006/05/16

More Info


Understanding oral mucosal swelling after root canal treatment can be a source of concern for many patients, especially when they notice changes in their oral cavity following dental procedures. In your case, it appears that you have developed a small swelling in the buccal mucosa (the inner lining of the cheek) near the site of your recent root canal treatment. This can understandably cause anxiety, but let's break down the situation based on your description and the typical responses to such occurrences.

Firstly, it is important to recognize that swelling in the oral mucosa can occur for several reasons, particularly after dental procedures like root canal therapy. The procedure itself can cause inflammation in the surrounding tissues, leading to temporary swelling. This is often a normal response as the body heals from the trauma of the treatment. The fact that the swelling is movable and not painful upon pressure is a positive sign, suggesting that it may not be an abscess or a more serious condition.

Your dentist's assessment that the swelling is not a lymph node is reassuring. Lymph nodes typically become enlarged in response to infection or inflammation and are usually tender to the touch. Since your dentist indicated that the swelling is small and not fixed, it is likely a benign condition, possibly a mucosal cyst or a minor inflammatory response.

However, it is essential to monitor the swelling. If it persists beyond a few weeks, increases in size, or begins to cause discomfort, further evaluation may be warranted. In some cases, persistent swelling can indicate an underlying issue, such as an infection or a reaction to the dental materials used during the procedure.
In terms of management, here are some steps you can take:
1. Observation: Keep an eye on the swelling. If it remains stable or decreases in size, it is likely a temporary issue.
2. Oral Hygiene: Maintain excellent oral hygiene to prevent any potential infections. Gently brush your teeth and use an antiseptic mouthwash to keep the area clean.

3. Follow-Up: Schedule a follow-up appointment with your dentist. They may want to monitor the swelling over time or perform additional diagnostic tests, such as imaging, to ensure there are no complications.

4. Pain Management: If you experience any discomfort, over-the-counter pain relievers can help manage any mild pain or inflammation.

5. Dietary Adjustments: Avoid hard or crunchy foods that may irritate the area until the swelling resolves.

6. Seek a Specialist: If your dentist is unable to provide clarity or if the swelling does not improve, consider consulting an oral surgeon or a specialist in oral medicine for a second opinion.

In summary, while it is natural to feel anxious about changes in your oral health, the characteristics of the swelling you described suggest that it may not be a serious issue. However, continued observation and communication with your dental care provider are key to ensuring your oral health remains on track. If you have any further concerns or if the situation changes, do not hesitate to reach out to your dentist for guidance.

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