Why Are My Teeth Sensitive to Hot and Cold After Getting Crowns?

Regarding the issue of sensitivity to hot and cold water after getting braces?

I previously had a tooth extraction and needed a dental bridge, so the adjacent teeth (which had not undergone root canal treatment) were reduced in size to fit crowns.
At that time, I did not experience sensitivity to hot or cold water.
Recently, one of the crowns broke, so I had to remake three crowns.
During the impression process, the old crown was used, and I still did not have sensitivity to hot or cold water.
However, after the new crowns were placed (during which the teeth were slightly adjusted), I began to experience sensitivity to hot and cold water.
The dentist only mentioned that the X-rays showed the tooth structure was intact and suggested that my teeth might be overly sensitive.
Since the issue remains unresolved, the crowns are currently only temporarily cemented.
Generally, placing crowns should resolve sensitivity to hot and cold water.
Therefore, I would like to ask if the sensitivity to hot and cold water after getting crowns could be due to improper fit of the crowns, or could there be other reasons?

Ke, 40~49 year old female. Ask Date: 2016/01/19

Dr. Zeng Guanghui reply Dentistry

The original dental bridge was redone due to one of the crowns breaking, resulting in the fabrication of three new crowns, while the old crown was used as a temporary crown.
At this point, there was no sensitivity to hot or cold.
However, after placing the new crowns, sensitivity to temperature began.
X-rays show that the tooth structure is intact, and the crowns are still temporarily bonded.
If the symptoms persist, it may indicate that the tooth's nerve is inflamed, or there may be insufficient fit of the crowns, or the edges of the crowns may be pressing against the gum tissue.
It is recommended to consult a dentist for further evaluation.

Reply Date: 2016/01/19

More Info

To address your question regarding sensitivity to hot and cold after getting crowns, it's important to understand the underlying factors that can contribute to this condition. Sensitivity can arise from several reasons, particularly after dental procedures like crown placement.

Reasons for Sensitivity
1. Exposed Dentin: If the crown does not cover the tooth completely or if there is any gap between the crown and the tooth, the underlying dentin may be exposed. Dentin is more sensitive than enamel, and exposure can lead to heightened sensitivity to temperature changes.

2. Pulp Irritation: The process of preparing a tooth for a crown often involves some degree of tooth reduction, which can irritate the dental pulp. This irritation can manifest as sensitivity to hot and cold, even if the tooth has not undergone root canal treatment.

3. Cementation Issues: If the crown is not properly cemented, it may allow for microleakage, which can expose the tooth to temperature changes and lead to sensitivity. This can also happen if the cement used is not adequately sealing the crown.

4. Underlying Dental Issues: There may be pre-existing conditions such as decay or gum disease that were not fully addressed before the crown was placed. These conditions can contribute to sensitivity.

5. Bruxism: If you grind your teeth (bruxism), this can put additional pressure on the crowns and surrounding teeth, leading to discomfort and sensitivity.

6. Material Reaction: Some patients may have a sensitivity to the materials used in the crown itself, especially if they have allergies to certain metals or resins.

Recommendations for Management
1. Follow-Up with Your Dentist: Since the sensitivity persists, it’s crucial to return to your dentist for a thorough examination. They can check the fit of the crown, look for any signs of decay, and assess the health of the underlying tooth.

2. Desensitizing Toothpaste: Using a toothpaste specifically designed for sensitive teeth can help alleviate discomfort. These products contain compounds that block the transmission of sensation from the tooth surface to the nerve.

3. Fluoride Treatments: Your dentist may recommend fluoride varnishes or treatments to strengthen the enamel and reduce sensitivity.

4. Adjustments: If the crown is found to be too high or improperly aligned, your dentist can make adjustments to alleviate pressure and sensitivity.

5. Consider a Root Canal: If the sensitivity is severe and persistent, it may indicate that the pulp is inflamed or infected. In such cases, a root canal may be necessary to relieve the pain and sensitivity.

6. Avoid Extreme Temperatures: Until the sensitivity is resolved, it may be beneficial to avoid very hot or cold foods and drinks to minimize discomfort.

Conclusion
In summary, sensitivity to hot and cold after getting crowns can be attributed to several factors, including exposed dentin, pulp irritation, cementation issues, and underlying dental problems. It's essential to consult with your dentist to identify the specific cause of your sensitivity and to determine the appropriate treatment. Proper follow-up care is crucial to ensure that your dental work is functioning correctly and to maintain your overall oral health.

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