Patient: Description of the condition (onset time, main symptoms, hospital visited, etc.): 2011.10.29 at 11:46 pm, the incisor knocked on the iron plant, at that time, I thought the incisor was gone, and then I cleaned it myself, only to find that a corner was missing, at that time, it should have been knocked numb. No I am now 20 years old, if I have my teeth pulled out, I don’t know if they can grow back, if not what should I do? Zhuang Peilin, Department of Stomatology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University: It is recommended to visit the stomatology department as soon as possible. If there is no obvious pain, you can consider filling or crown restoration. In case of root fracture, the clinician needs to examine the tooth carefully and decide whether to keep the affected tooth or not. Patient: First of all, thank you for taking time out of your busy schedule to answer my question. I have been feeling a little sensitive since I broke my tooth yesterday, but otherwise I have no other symptoms like toothache or bleeding. I will follow your advice, and I may have to ask you again if I need to. Chuang Pei-Lin, Department of Stomatology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University: You are advised to avoid stimulating the affected tooth during this period, and consider filling or crown restoration if there is no discomfort. No damage to the root means that the root is in good condition and the affected tooth can be retained without extraction. You need to take pictures to check whether the root is damaged or not. You should try not to pull the tooth, your current tooth does not have to be replaced, pull it out and it is gone.