Why Does My Tooth Feel Sour After a Filling? Common Dental Concerns

After getting a dental filling for a cavity, it is still common to experience a sour taste in the mouth?

Hello, Dr.
Huang.
I have a question.
I used to feel a slight sensitivity in one of my teeth when rinsing my mouth, but I didn't notice any visible damage.
After visiting the dentist, he mentioned that I had a large cavity and suggested a filling.
He said that if the nerve was affected, I might need a root canal, but he didn't mention anything about needing one at that time.
However, after returning home, I still experience a slight sensitivity when rinsing my mouth, although I don't feel anything during normal activities or when eating.
Is this sensitivity when rinsing an indication that I might need a root canal, or is this considered normal?

Xiao Hua, 30~39 year old female. Ask Date: 2018/12/26

Dr. Huang Tingfang reply Dentistry

Dear Miss Xiaohua,
Hello! As mentioned, it is still necessary to observe.
If you experience pain when consuming hot food, or if the pain lasts for more than an hour continuously, or if there is pain during biting, please seek medical treatment! Please communicate more with your physician.
Thank you! Wishing you safety!
Sincerely,
Dr.
Huang Tingfang, Dentistry

Reply Date: 2018/12/26

More Info

After receiving a dental filling, experiencing sensitivity or a sour feeling in the tooth can be concerning. This sensation, particularly when rinsing your mouth, may arise from several factors related to the filling procedure and the condition of the tooth itself.

Firstly, it’s important to understand that dental fillings are designed to restore teeth that have been damaged by decay. If the cavity was extensive, as your dentist indicated, the filling may have been placed close to the nerve of the tooth. This proximity can lead to temporary sensitivity, especially to temperature changes or pressure. The sensitivity you feel when rinsing could be a sign that the nerve is still reacting to the filling, which is not uncommon.
In some cases, the material used for the filling can also contribute to sensitivity. For instance, composite resin fillings can sometimes cause a reaction in the tooth, leading to a sour or uncomfortable feeling. If the filling was placed under less-than-ideal conditions, such as moisture contamination or if the tooth was not adequately dried before the filling was applied, this could also lead to sensitivity.

Another possibility is that the tooth may have underlying issues that were not fully addressed during the filling procedure. For example, if there is still decay present or if the tooth has a crack, this could lead to ongoing discomfort. Additionally, if the filling is too high, it may cause discomfort when biting down, which could also contribute to a sour sensation when rinsing.

Regarding your concern about needing a root canal, it’s essential to monitor your symptoms. If the sensitivity persists or worsens, or if you begin to experience pain when biting or a lingering ache, these could be signs that the nerve is affected, and a root canal may be necessary. However, if the sensitivity is mild and only occurs during rinsing, it may simply be a temporary reaction to the filling.

It’s advisable to follow up with your dentist to discuss your symptoms. They may recommend a bite adjustment or further evaluation to ensure that the filling is not causing undue pressure on the tooth. If the sensitivity continues, they might suggest additional treatments or monitoring to determine if a root canal is warranted.

In summary, while some sensitivity after a filling can be normal, especially if the cavity was deep, it’s crucial to keep an eye on your symptoms. Regular communication with your dentist will help ensure that any potential issues are addressed promptly, allowing you to maintain your oral health effectively. If you have any concerns about the sensations you’re experiencing, don’t hesitate to reach out to your dental professional for further evaluation and peace of mind.

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