A dead tooth is a tooth with a necrotic pulp. The pulp is the nerve inside the tooth, which normally plays a role in blood circulation and nutrient supply, as well as the sensory function of the tooth. If a tooth has been struck by an external force, or if it is decayed, this can lead to necrosis of the nerve, which is also known as pulp necrosis. This situation is also called dead pulp teeth, and dead pulp teeth need to carry out root canal treatment, root canal treatment, the tooth will be bleached, you can put oxide inside the tooth, which can promote the color of the tooth has changed. This can promote the color change of the tooth and achieve a certain effect. Later on, the tooth can be restored with a ceramic dental sleeve, or an all-ceramic crown, which will ensure that the tooth is resistant to fracture. In addition, if the dead pulp tooth is split, you can directly extract the tooth, and observe for about three months, and then repair the denture.