Enamel Damage and Tooth Sensitivity: A Dental Guide - Dentistry

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Enamel damage and dental caries?


Hello, Doctor.
I have two questions I would like to ask:
1.
I had a dental check-up yesterday, and the dentist found that the inner root of my upper left second molar is sensitive.
The dentist determined that it was due to excessive brushing causing enamel wear, and I experienced sharp pain when consuming cold items.
I received a desensitizing treatment, but now, instead of just pain from cold drinks, I feel some discomfort when chewing.
Could this be an adjustment period? There is no cavity reaching the nerve, so why is this happening?
2.
My upper left premolar had a deep cavity filled two years ago, but it has been persistently sensitive.
Recently, I have experienced pain when biting down, and I also feel particularly uncomfortable and sensitive during my menstrual period.
The dentist suggested that the filling might be too close to the nerve and recommended a root canal followed by a crown, but I do not have any spontaneous pain.
Is it necessary to undergo a root canal and get a crown? Thank you, Doctor, for taking the time to respond.

Xiao Mei, 30~39 year old female. Ask Date: 2021/02/10

Dr. Zeng Guanghui reply Dentistry


Hello Xiaomei: 1.
It is possible that despite having a deep cavity filled, the dental pulp may still be inflamed.
It is recommended to return for a check-up with the dentist.
2.
If the cavity is very deep and has been filled, it may still cause recurrent inflammation of the dental pulp.
It is advisable to return for an evaluation to determine if a root canal treatment is necessary.
Dr.
Tseng Guang-Hui, Department of Dentistry, Nantou Hospital.

Reply Date: 2021/02/10

More Info


Tooth sensitivity and enamel damage are common dental issues that can arise from various factors, including aggressive brushing, enamel erosion, and dental decay. Understanding these conditions is crucial for effective management and treatment. Let's address your two questions regarding tooth sensitivity and the need for root canal treatment.


1. Sensitivity After Applying a Desensitizing Agent
You mentioned that after your recent dental visit, where a desensitizing agent was applied to your left upper second molar due to sensitivity, you are now experiencing pain when eating, particularly with cold or acidic foods. This situation can be perplexing, especially since your dentist indicated that there was no decay reaching the nerve.

The initial sensitivity you experienced was likely due to enamel wear, which can expose the underlying dentin layer of the tooth. Dentin contains microscopic tubules that lead to the nerve endings, making it sensitive to temperature changes and certain foods. When a desensitizing agent is applied, it works by blocking these tubules or by creating a protective layer over the exposed dentin. However, it is not uncommon for patients to experience a temporary increase in sensitivity or discomfort after such treatments. This could be due to several reasons:
- Adjustment Period: Your teeth may need time to adjust to the desensitizing treatment. The sensitivity might diminish as your teeth acclimate.

- Underlying Issues: If there is any microfracture or additional enamel erosion that was not previously identified, it could contribute to the sensitivity.

- Technique Sensitivity: Sometimes, the application of a desensitizing agent can cause temporary irritation to the gums or surrounding tissues, leading to discomfort.

If the pain persists or worsens, it is essential to follow up with your dentist for further evaluation. They may consider additional treatments or adjustments to your dental care routine.


2. Need for Root Canal Treatment on the Left Upper Premolar
Regarding your left upper premolar that has a history of deep decay and ongoing sensitivity, your dentist's recommendation for a root canal may be warranted, even in the absence of spontaneous pain. Here are some considerations:
- Proximity to the Nerve: If the filling is close to the pulp (nerve) of the tooth, it can lead to increased sensitivity and discomfort, especially when biting or chewing. This is because the pulp can become inflamed (pulpitis) due to the irritation from the filling material or the decay itself.

- Chronic Sensitivity: Persistent sensitivity, especially when biting, can indicate that the nerve is under stress. While spontaneous pain is a classic sign of needing a root canal, many patients experience sensitivity and discomfort without it being severe enough to cause constant pain.

- Risk of Infection: If the nerve becomes irreversibly damaged, it can lead to infection, which may require more extensive treatment later on. Addressing the issue proactively with a root canal can prevent complications.

In summary, while the absence of spontaneous pain might make you hesitant about undergoing a root canal, the ongoing sensitivity and the dentist's assessment suggest that it may be a necessary step to preserve the tooth and prevent further complications. It is always best to discuss your concerns with your dentist, who can provide personalized advice based on your specific situation.


Conclusion
Tooth sensitivity and enamel damage can significantly impact your quality of life, but with appropriate dental care and treatment, these issues can often be managed effectively. Regular dental check-ups, proper brushing techniques, and the use of desensitizing agents can help mitigate sensitivity. If you have ongoing concerns about your dental health, do not hesitate to seek further evaluation from your dentist. They can provide tailored recommendations and treatment options to ensure your oral health remains optimal.

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