A tooth broken in half without pain may be traumatized by the pulp temporarily unconscious, the affected tooth should be repositioned and fixed as soon as possible, and if the pulp has symptoms of inflammation or necrosis, root canal treatment should be done in a timely manner, otherwise it may lead to occlusal trauma, loosening of the affected tooth and other symptoms. The pulp may lose sensation when blood vessels and nerves are damaged during trauma, resulting in no pain response and no response to pulp vitality test, which usually occurs after 6~8 weeks. The tooth should be repositioned and immobilized in a timely manner after the trauma, followed by regular checkups and root canal treatment if inflammation or necrosis of the pulp is detected. If not treated in time, the affected tooth and the surrounding periodontal membrane and alveolar bone can not heal properly, which may lead to early contact and interference with the affected tooth, causing occlusal trauma, and in severe cases, loosening and falling off. It is recommended to go to the hospital in time to receive regular treatment as soon as possible.