1.Why do I need root canal treatment? The most simple and direct answer is: to preserve your tooth! 2.There is no nerve in the tooth, it is “dead”, how can it be preserved? How long can you keep it? The blood supply of the tooth does not only depend on the pulp tissue inside the tooth, but also on the periodontal tissue around the tooth, which means that the tooth still has a peripheral nutritional supply, as long as the root canal treatment is done in time to protect the tooth, in general, the tooth will be fine until old age. 3.How does root canal treatment work? Root canal treatment starts with clarifying the root canal situation, then root canal preparation, root canal disinfection and root canal filling. The ultimate goal is to clean up the infected and necrotic materials inside the root canal to prevent reinfection.