Below are some signs that show you have a dead tooth.
Tooth color change
Continuous blood supply to your dental pulp helps keep your teeth white. If interrupted, your teeth will not receive the necessary nourishment and will discolor. Discoloration in a dead tooth is uniform, unlike that from regular staining. Also, the tooth cannot be easily whitened.
A dying tooth may appear yellow or light brown in the initial stages. But, the discoloration increases over time as the dental pulp tissues continue to die. Eventually, the tooth will become grey or black.
Tooth pain
This is a possible symptom of a dying or dead tooth caused by damaged or diseased tooth nerves. You may experience pain in the tooth when chewing or biting. The range of discomfort varies with the individual. Some feel intense pain, while others experience mild pain.