I saw my dentist for sensitivity to heat, cold, and pressure in an upper left molar tooth in late December. My dentist placed a crown over the tooth. But a few days later, the symptoms increased. I returned to my dentist, who said she would adjust the crown. I even asked her if I needed a root canal, but she said it was unnecessary. She told me that the tooth should settle down within three weeks. The tooth did not settle down, so I took Advil. Now the tooth is still slightly sensitive. I have not decided if I will return to my dentist or switch dentists because I was supposed to start Invisalign last month but cannot because my dentist has not resolved the issue with my crown. I am concerned that I might lose the tooth and need a dental implant. How can I tell if the problem is with the crown or my tooth? – Nate from San Diego
Nate,
Thank you for your question
We recommend that you ask another dentist to x-ray your tooth. It is unusual for a dentist to use a dental crown to resolve tooth sensitivity without checking for infection.
What Causes Tooth Sensitivity?
A tooth is sensitive to heat, cold, or pressure due to irritation. Irritation may increase when a dentist prepares a tooth for a crown, reducing tooth structure on all sides. If you have tooth decay or an old filling, removing it first and applying bonding or a glass ionomer might relieve the irritation and allow for a dental crown. But if the irritation persists or increases, you need root canal treatment and a dental crown.
When Sensitivity Decreases without Intervention

The only way to confirm the status of your tooth is with an x-ray. If you are not confident that your dentist can resolve the issue, please get a second opinion. Although tooth infection can spread and result in tooth loss, prompt care can prevent the need for tooth extraction and a dental implant. Although it is disappointing to delay Invisalign treatment, it is best to resolve your concerns now rather than interrupt it due to a flare-up later.
Dr. Brian LeSage, a Beverly Hills accredited Fellow of cosmetic dentistry, sponsors this post.