I believe everyone has heard the term “dental nerve” but can you guess what it looks like? Some people say it’s a white thing, and some people say it’s invisible to the naked eye. So why does the dentist have to extract your nerves? What is dental nerve? Dental nerve refers to the pulp in the root canal. The outer layer of human teeth is very hard and wear-resistant, but in the middle is a cavity with many blood vessels and nerves. This is the “weak heart” of the teeth. We call these weak internal tissues “pulp.” Why kill the nerves? The main goal of endodontic treatment is to maintain the integrity and health of the teeth and supporting tissues. The dental pulp is usually enclosed inside the crown and not in contact with the outside. When tooth decay or trauma causes the dental pulp to come into contact with external bacteria, infection may occur. At this time, the infected dental pulp must be removed to prevent the infection from spreading. When severe tooth decay damage to the pulp (leading to pulpitis) will cause severe pain, this situation requires nerve killing. There are other problems such as root inflammation and pulp exposure. What conditions need to kill nerves? For teeth with these symptoms, consider undergoing dead pulp treatment. For example, if the tooth defect is severely damaged, it will damage the nerve. After the nerve is inflamed, the pain is unbearable. In this case, you can only take the dental nerve. It disappears immediately and the effect is obvious. Apical abscesses, apical granulomas, and apical cysts are due to infection around the apex, causing tissue inflammation and involving the entire pulp. In this case, you can only take the dental nerve and make the entire tooth hollow to the root tip, release the root tip pressure, and open it for a few days. After anti-inflammatory, disinfection. After the pain is completely relieved, fill the tooth again. Exposed tooth roots are more common in the elderly. Due to atrophy of the gums and alveolar bone shrinkage, the roots are exposed. The roots are not protected by enamel. They are particularly sensitive and some may even cause pain. Like this, only the nerve killing treatment is used. It won’t hurt anymore. Here comes the point: Does killing nerves hurt? You can rest assured that the doctor will give you anesthetics before the treatment, which is generally not painful. Anesthetics may not be effective unless the inflammation is severe, but it is certain that the pain after treatment will be much lighter than your usual toothache.