Root Canal Treatment: What to Do When You Have a Cavity - Dentistry

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Root canal treatment


Hello, Doctor.
During my dental visit this week, the dentist told me that I have a cavity in my molar.
After drilling, he mentioned that my previous root canal was not done properly and needs to be redone.
However, he said that the procedure would take a long time, so it couldn't be done today.
He applied fluoride and asked his assistant to schedule my root canal treatment for the end of April.
When I got home and removed the fluoride paste, I realized that the cavity in my molar was not filled.
Now, I have to live with this large hole for almost two months before I can see the dentist for the root canal treatment.
Is this correct? Although the cavity doesn't hurt, shouldn't I have the dentist fill it first? I'm worried that food might get stuck in the hole, and if I can't brush my teeth right away, it could lead to a deeper cavity.

Miss Zhou, 20~29 year old female. Ask Date: 2023/02/18

Dr. Lin Jiayong reply Dentistry


Hello: It is recommended to have the original clinic's dentist fill it in first, and then reopen it in April.
Otherwise, with an additional two months of waiting time, there is a risk of fracture due to the cavity in the tooth.

Reply Date: 2023/02/18

More Info


When faced with a dental issue such as a cavity that requires root canal treatment, it’s essential to understand the implications of delaying treatment and the best practices for managing your oral health in the meantime. In your case, it seems that you have a cavity in your molar, and your dentist has indicated that a previous root canal procedure was not adequately performed, necessitating a redo of the treatment. You are understandably concerned about the large cavity left unfilled while you wait for your root canal appointment.

First and foremost, it is crucial to recognize that a cavity, especially one that has penetrated deep enough to affect the pulp of the tooth, can lead to significant complications if not addressed promptly. The pulp contains nerves and blood vessels, and if bacteria enter this area, it can lead to infection, pain, and even tooth loss. Therefore, while your dentist has recommended waiting for the root canal treatment, it is advisable to ensure that the cavity is adequately protected in the interim.

Here are some key points to consider regarding your situation:
1. Temporary Filling: It is generally advisable to have a temporary filling placed in the cavity if you have to wait an extended period before the root canal treatment. This can help prevent food particles from entering the cavity, reduce the risk of further decay, and protect the tooth from sensitivity and discomfort. If your dentist did not place a temporary filling, you should contact them to discuss this concern. It is better to have a temporary solution than to risk further complications.

2. Oral Hygiene: While you wait for your root canal treatment, maintaining excellent oral hygiene is crucial. Brush your teeth at least twice a day and floss daily, being careful around the affected area. If you are unable to brush immediately after eating, rinsing your mouth with water can help remove food particles and reduce the risk of further decay.

3. Dietary Considerations: Avoid hard, sticky, or sugary foods that could exacerbate the cavity or cause discomfort. Soft foods that require minimal chewing can be a safer choice while you wait for your treatment.

4. Pain Management: If you experience any discomfort, over-the-counter pain relievers such as ibuprofen or acetaminophen can help manage pain. However, consult your dentist before taking any medication, especially if you have any underlying health conditions or are taking other medications.

5. Follow-Up: If you notice any changes in your symptoms, such as increased pain, swelling, or sensitivity, contact your dentist immediately. These could be signs of infection or other complications that may require urgent care.

6. Understanding Root Canal Treatment: Root canal treatment involves removing the infected or damaged pulp from the tooth, cleaning and disinfecting the interior, and then sealing it to prevent future infection. It is a common procedure that can save a tooth that would otherwise need to be extracted. The process can take one or more visits, depending on the complexity of the case.

In summary, while waiting for your root canal treatment, it is essential to protect the cavity from further decay and manage your oral hygiene effectively. If your dentist did not provide a temporary filling, it is advisable to reach out to them for a solution. Your oral health is paramount, and taking proactive steps can help ensure that you do not face additional complications before your scheduled treatment.

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