Common Causes
The top or crown of a tooth is covered by enamel, which is protective to the underlying, more sensitive layer of dentin. The root also has underlying dentin that is covered with a protective layer of cementum. A little break in the enamel can lead to sensitivity. The cause of this break can be a tooth cavity, a fractured tooth structure, or even worn-away enamel from grinding your teeth at night. In this case, treatment for sensitivity will require repairing the tooth.
Gum problems can also lead to teeth developing sensitivity. Receding gums allow the root of the tooth to become exposed and, eventually, covered with plaque and tartar. With a thorough cleaning by your dentist and improving your personal oral hygiene, the sensitivity will improve. Nonetheless, the natural exposure of the neck of the tooth – below the end of the enamel – can still lead to this problem without initial decay or gum problems.
After your dentist has ruled out some of these causes, he or she can provide a treatment regimen. It may be both an in-office and at-home approach.