Tetracycline teeth are the result of tetracycline drugs taken during your mother’s pregnancy and when you were a child. The characteristics of tetracycline teeth are 1, is yellow, in the sunlight tetracycline teeth under the bright yellow fluorescence, and then gradually from yellow to brown or dark gray. 2, the front teeth than the back teeth coloring obvious; milk teeth coloring and more obvious than permanent teeth, because the enamel of milk teeth is thinner, more transparent, not easy to cover the color of the tetracycline bond in the dentin. 3, the degree of tooth coloring with the type of tetracycline, dose and the number of dosing. 4, tetracycline caused tooth coloring and enamel dysplasia, both only in the tooth development period to give the drug to show. Generally speaking, after the age of 6 to 7 years old, the drug will not cause striking tooth discoloration. I don’t know how the twisting of your tooth is, but if the twisting is not very strong, you can get a common in place without killing the nerve, if the twisting is heavy, you need to do porcelain tooth after root canal treatment by adjusting the tooth or after pile core restoration. If you are not in a hurry to repair, I see that your age is 27 years old, you can first orthodontic treatment to align the teeth before restoration.