Patient: Hello doctor, can I ask you about tooth pain without killing the nerve? Doctor: There are many different kinds of tooth pain, and it depends on the cause of the pain to decide whether to kill the nerve or not. Generally speaking, in cases of pulpitis, apical infection, etc., the nerve cannot be preserved, and then root canal treatment (nerve killing) is required. Patient: Is it very painful to kill the nerve? Doctor: Nowadays, the treatment technology is constantly improving, and the principle of painless treatment is generally used to carry out the treatment. Patient: How long does it take to kill the nerve and is it good for multiple treatments? Doctor: It depends on the condition to determine the length of time, the lighter the tooth condition, the less times. Patient: What else do I need to do after killing the nerve? Is it possible to fill the tooth directly? Doctor: It is generally recommended to wear a crown after treatment, so that the tooth will be preserved for a longer period of time after treatment. Patient: Is it very expensive to wear a crown? Doctor: There are many kinds of crowns, depending on the individual situation, the standard requirements, different materials, different manufacturing techniques (technicians), different manufacturing processes, the cost will also vary. Patient: Is it possible to wear a crown for life? Doctor: You can’t understand it like that. No one can predict how long our own teeth can follow us. It depends on the habits of the individual and his or her physical condition. With a crown, it is equivalent to giving an extra layer of protection to a tooth that has no nerve. Patient: Okay, I understand. You can think of it this way: if the nerve of the tooth is inflamed, it must be treated. Doctor: Yes