A tooth broken in half cannot grow back naturally, and a tooth broken in half needs to be treated. Whether it is a permanent tooth or a milk tooth, after breaking half of it can not grow back naturally, milk teeth, permanent teeth do not have the ability to regenerate, the crown, the root of the tooth has been growing, eruption, due to trauma and other reasons after breaking half of it, such as not to deal with it will remain half of the tooth. If a baby tooth is broken in half, you can wait for the baby tooth to fall out and replace the permanent tooth, and then grow a normal tooth again. If half of the tooth is a permanent tooth, the permanent tooth does not have the ability to replace or regenerate, we need to see if the remaining half of the tooth can be retained, if it can be retained, we can carry out root canal treatment, and then restored through the pile crowns, full crowns; if it can not be retained, it needs to be extracted and then restored through dental implants. After the tooth is broken in half, you can go to the stomatology department of the regular hospital in time, and be handled by a professional doctor.