A. Is root canal treatment not “nerve extraction”? Root canal therapy, also known as endodontic treatment, is currently the most effective method of treating endodontic and periapical diseases in the world. What is the relationship between “root canal treatment” and “nerve extraction” and “nerve killing”? Generally speaking, root canal treatment is the professional term for “extraction of dental nerve”. However, modern root canal treatment technology is far from being as simple as “extracting the nerve”, so “extracting the nerve” is not the same as “root canal treatment”. In fact, as people’s standard of living has improved and their knowledge of oral health care has increased, many toothache patients know that they need to see their dentist and that their tooth may need a “root canal”. This is a great step forward! May more people know that root canal treatment is an important way to preserve our own teeth and to appreciate and care for them more. Second, why do doctors sometimes ask for root canal treatment instead of filling? Some patients come to the doctor and ask for a filling straight away. However, sometimes the doctor will tell him that “root canal is needed” after examination. Do you understand this? The doctor will check and evaluate the vitality of the pulp, take X-ray to determine the depth of the caries and the distance from the pulp, and judge whether there is inflammation at the tip of the tooth. 1.For those medium caries and clear deep caries, the doctor will give filling treatment; 2.For clear pulpitis, pulp necrosis, various types of periapical inflammation (such as pulpitis caused by caries, hidden fissure, overconsumption, pulp penetration, etc. and pulp necrosis can not preserve the living pulp) and the tooth has the value of preservation, the doctor will give root canal treatment; 3.For some difficult to specify whether there is irreversible 3.For some deep carious teeth that are difficult to specify whether there is irreducible pulpitis, the doctor will generally conservatively preserve the living pulp for observation; 4.For some teeth that have no preservation value, the doctor will suggest the patient to choose extraction.