Patient: Hello Dr. Jiang: Thank you for reading my letter in your busy schedule. My teeth are not good since childhood, the front bottom incisors are a little small, because the teeth often lose scum, a little nerve leakage, then I was introduced by a friend in a private place to do porcelain teeth, I did three, but these three are installed in a crown, after doing a very swollen, especially in the afternoon and evening, I want to remove and do it again, I do not know if it is possible? Is it painful to remove them? I am very sensitive to dental pain and I am very afraid of it. I would like to ask you about my confusion and hope to get your help! Beijing University Stomatology Hospital, Department of Prosthodontics Jiang Ting: Removal of porcelain crowns itself will not be very painful, in general a few minutes to remove a crown. Then repair according to the situation, it is best to repair each tooth individually. As for the need to remove and redo, how to repair after removal, can only answer after examination.