My left upper incisor has darkened right next to the gum, approximately 0.5 cm down from the gum.
Nothing hurts, I do not take any medication and there was no blow to the teeth or anything similar.
I would like to know what caused this darkening.
Thank you very much for your answer.
Eliabeta

Dear Sir/Madam!

Darkening of an incisor in the way you described is characteristic of non-vital (dead) teeth. Medications and other causes discolour teeth somewhat differently. The dark colour of dentine showing through at the neck of the tooth, where the enamel is thinner, raises suspicion of the diagnosis described above. The causes of tooth death can be very different, but most often the cause is trauma to the tooth, which may have occurred a long time ago. Trauma also includes minor blows that you may not even have noticed at the time. Preparing a tooth for a filling or deep caries are also common causes of this condition, but since you did not mention these in your question, I assume that the darkening is due to the cause described above.

Thank you and have a nice day!