Why Is My Tooth Hurting After a Recent Filling? Dental Concerns Explained

The tooth that was filled two years ago is now painful when biting?

Two years ago, I had a lower molar filled, but recently I noticed that the tooth doesn't seem very healthy.
I went to the dentist because there was a small cavity at the edge of that molar, and the doctor filled the area next to it.
However, after the filling, I have been experiencing pain when biting down on that molar, and I also noticed some slight dark spots on it.
Should I ask my dentist to refill that tooth?

Luo, 10~19 year old female. Ask Date: 2015/10/28

Dr. Zeng Guanghui reply Dentistry

The above situation may indicate that the dental pulp nerve is already inflamed.
It is recommended to consult a dentist for further diagnosis and treatment, and to assess whether root canal therapy is necessary.

Reply Date: 2015/10/28

More Info

Experiencing pain in a tooth after a recent filling can be concerning and may arise from several factors. Understanding these factors can help you determine the best course of action regarding your dental health.

1. Post-Filling Sensitivity: It's common for teeth to be sensitive after a filling, especially if the filling is deep or if the tooth was previously decayed. This sensitivity can occur due to inflammation of the dental pulp, which is the innermost part of the tooth containing nerves and blood vessels. If the filling is close to the pulp, it can cause discomfort when chewing or when exposed to temperature changes.

2. Improper Fit of the Filling: If the filling is not properly contoured to match the natural shape of your tooth, it can create pressure points when biting down. This misalignment can lead to pain during chewing. If you notice that the filling feels higher than the surrounding teeth, it’s advisable to return to your dentist for an adjustment.

3. Recurrent Decay: The presence of black spots on the tooth may indicate recurrent decay, which can occur around the edges of a filling if bacteria infiltrate the area. This situation can lead to further decay and increased sensitivity or pain. If you suspect that there is new decay, it is essential to have your dentist evaluate the tooth and possibly replace the filling.

4. Cracked Tooth Syndrome: Sometimes, a tooth can develop cracks that are not visible but can cause pain when biting. This condition, known as cracked tooth syndrome, can lead to discomfort and may require more extensive treatment, such as a crown or root canal, depending on the severity.

5. Pulpitis: If the pain is severe or persistent, it could indicate pulpitis, an inflammation of the dental pulp. This condition can arise from deep decay or trauma to the tooth and may require root canal therapy if the pulp is irreversibly damaged.

6. Gum Issues: Sometimes, pain can be referred from gum problems, such as gingivitis or periodontal disease. If the gums around the tooth are inflamed or infected, this can cause discomfort that feels like it’s coming from the tooth itself.

Given your situation, where you have experienced pain after a filling and noticed black spots, it is advisable to contact your dentist as soon as possible. They can perform a thorough examination, possibly including X-rays, to assess the condition of the tooth and the surrounding structures. If recurrent decay is present, your dentist may recommend replacing the filling or other treatments to restore the tooth's health.

In summary, while some sensitivity after a filling can be normal, persistent or severe pain, especially accompanied by visible signs of decay, should not be ignored. Early intervention can prevent further complications and ensure that your dental health is maintained. Always communicate openly with your dentist about your symptoms and concerns, as they can provide the best guidance tailored to your specific situation.

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