A tooth broken in half needs to go to the hospital to check whether the fractured part of the pulp cavity is exposed, if it is not yet exposed can be used to repair the shape of the tooth with resin or crowns; if the pulp is exposed also need to carry out root canal treatment after the crown repair. 1. The pulp cavity is not exposed. If a tooth is broken in half, and after examination, if it is broken only from the dentin surface, and the pulp cavity has not been exposed, desensitizing drugs such as strontium chloride can be used to desensitize the tooth, and then resin can be used to fill the tooth or crown restoration to restore the shape of the tooth. 2. The pulp cavity has been exposed. If the pulp cavity of a broken tooth is exposed, the pulp is usually infected, and root canal treatment is needed to remove the infected pulp, and then consider dental crown restoration. If the tooth is broken in half, it is recommended to go to the hospital for examination and treatment in time, so as to avoid inflammation or the expansion of inflammation to aggravate the pain.